It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.

On Jun 5, 6:16*am, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...-gallon-rain-b...

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.

do you have a lid on one but not the other?

Barrels set a different heights?

Harry K

dgk wrote:

So I guess the height of water in two dissimilar barrels, connected
by a hose, will not be the same but will vary depending on the
diameter or width of the barrels?

No.

They will reach equal height - with respect to a common reference
point.

This is assuming there is no air in the connecting hose, or the
connecting hose does not rise higher at any point in it's run between
barrels than the initial water level in either barrel.

The cross-sectional area of the barrels will not play any role in this.

On 6/5/2012 8:16 AM, dgk wrote:
....

... One is an actual rainbarrel, with faucet already installed:

....
... I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.
....

Eventually, it should definitely reach the same level. Since the one
only I presume is connected to the downspout the differential filling
will be pronounced in its favor and apparently there's sufficient
pressure drop/friction loss to add a significant head on the one side
relative to the other. But, that's a dynamic loss that eventually
gravity equal pressure external should overcome and the levels will
equalize. Unless there's a cover that's building a pressure dome over
one side or other interfering issue.

There's a wikipedia article on water columns I just looked at to refer
you to altho I forgot to copy the link, sorry, it wasn't hard to find...

--

On Tue, 5 Jun 2012 06:42:58 -0700 (PDT), Harry K
wrote:

On Jun 5, 6:16*am, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...-gallon-rain-b...

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.

do you have a lid on one but not the other?

Barrels set a different heights?

Harry K

The original is mostly sealed but has two screened areas. The
Rubbermaid has no top but I have sealed it with a screen and wooden
planks to keep stray critters from falling in and drowning. Air
pressure is unlikely to be a factor.

Both are on a couple of cinderblocks so the base is at the same height
off the ground. The Rubbermaid is about 8" taller.

On Tue, 05 Jun 2012 09:08:12 -0500, dpb wrote:

On 6/5/2012 8:16 AM, dgk wrote:
...

... One is an actual rainbarrel, with faucet already installed:

...
... I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.
...

Eventually, it should definitely reach the same level. Since the one
only I presume is connected to the downspout the differential filling
will be pronounced in its favor and apparently there's sufficient
pressure drop/friction loss to add a significant head on the one side
relative to the other. But, that's a dynamic loss that eventually
gravity equal pressure external should overcome and the levels will
equalize. Unless there's a cover that's building a pressure dome over
one side or other interfering issue.

There's a wikipedia article on water columns I just looked at to refer
you to altho I forgot to copy the link, sorry, it wasn't hard to find...

I was really puzzled because I would have bet that they'd end up the
same height. Maybe they will equalize after some time.

On Tue, 05 Jun 2012 09:43:13 -0400, Home Guy wrote:

dgk wrote:

So I guess the height of water in two dissimilar barrels, connected
by a hose, will not be the same but will vary depending on the
diameter or width of the barrels?

No.

They will reach equal height - with respect to a common reference
point.

This is assuming there is no air in the connecting hose, or the
connecting hose does not rise higher at any point in it's run between
barrels than the initial water level in either barrel.

The cross-sectional area of the barrels will not play any role in this.

Nope, the hose dips between the two, below the bottom of the barrels.
I guess there could be some air in the hose, but one of my checks was
to turn off the faucet on the rubbermaid and leave both valves open on
the splitter. Water came out so it was clearly still coming from the
first barrel. I'm hoping that it will equalize when I'm not watching
it.

On 6/5/2012 8:16 AM, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.





if they are not the same diameter, the levels will not be the same.

--
Steve Barker
remove the "not" from my address to email

On 6/5/2012 10:22 AM, Steve Barker wrote:
On 6/5/2012 8:16 AM, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html


I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.





if they are not the same diameter, the levels will not be the same.


strike that. I am thinking of something else. (don't know what).

--
Steve Barker
remove the "not" from my address to email

Steve Barker wrote:

On 6/5/2012 10:22 AM, Steve Barker wrote:

-snip-

if they are not the same diameter, the levels will not be the same.


strike that. I am thinking of something else. (don't know what).

Same thing I'm thinking of, most likely. Something to do with
gravity & such. We can't both be wrong, can we?

Jim

"dgk" wrote in message
...
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.


Water seeks it's own level. The size or shape of the two barrels/buckets
doesn't make any difference-----so under normal circumstances the water
levels would be at the same height ( the volume of water in each container
can be significantly different). One factor that would result in different
heights would be if the tops of one of them (or both) are sealed-air tight.
Another would be if the connection between the containers is restricted
limiting the flow between them--in this case the levels would eventually be
equal so long as there is a flow between the containers. If the full
container has it's top sealed than the amount of water leaving it would be
very small --think finger on the end of a straw Again, if the top is not
completely air tight then there will be a transfer of water but at a very
slow rate. Overall, the water levels between the two containers would be
governed by a force balance---Look up how a manometer works.
MLD

dgk,


Both are on a couple of cinderblocks so the base is at the same height
off the ground. The Rubbermaid is about 8" taller.

This seems to avoid Harry K's point. If I put a barrel on top of 2
cinderblocks at the bottom of a hill and then put a barrel on top of 2
cinderblocks at the top of the very same hill, the fact that each barrel is
only 2 cinderblocks up from the ground is not especially relevant.
The water columns should be the same height from the Earth's center of
mass (or whatever) when they equalize. I'm having a hard time believing that
the resistance through the various faucets would be enough to slow the
equalization markedly.

On Tue, 05 Jun 2012 09:16:25 -0400, dgk wrote:

It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.



Unless there is a strange restriction the levels WILL be equal in both
barrels.

What is the interior diameter of the connecting hose?

A water level is a hose, with water, and a vertical guage at each end
of the hose, used for leveling or determining the level of a surface.
I have one 75' long, with a hose of 1/2" interior diameter hose.

Your connecting hose can not have an interior diameter of 3/8" or
less, or, like a water level, it will not work properly by leveling
itself off. Air pockets are most likely to get trapped and affect a
water level when using a tube or hose of 3/8" or less (in interior
diameter), also, and that is why water level hoses must have an
interior diameter of greater than 3/8". Osmotic pressure!!!

Sonny

On Tue, 05 Jun 2012 10:22:08 -0500, Steve Barker
wrote:

On 6/5/2012 8:16 AM, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.





if they are not the same diameter, the levels will not be the same.
Yes they will. One could be an inch in diameter, and the other 6
feet, and the level in both will be the same if they are connected.
Note, it will be the LEVEL, not the distance from either the top or
bottom of the container.

The hose from the bottom will be full to the level of the water in the
barrel if the valve is left open and the end of the hose is higher
than the water level in the barrel.

On Jun 5, 8:16*am, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...-gallon-rain-b...

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.

How different are the water levels?

And how are you measuring it? The barrels are some distance apart,
probably one's taller than the other; you sure it's not a trick of the
eye?

Chip C
Toronto

From what I remember of school, the water SHOULD reach the same height, in
both barrels. The fact it's not, well, who can tell? Do you have the barrels
on a slope, so one is lower than the other?

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"dgk" wrote in message
...
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.

The old saw about "water seeks its own level" doesn't depend on the diameter
of the barrel. If it did, you couldn't read a coffee pot with a tube up the
side. Or a holding tank on a farm, or... or... or.....

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"Steve Barker" wrote in message
...

if they are not the same diameter, the levels will not be the same.

--
Steve Barker
remove the "not" from my address to email

Whack! Consider yourself struck.

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"Steve Barker" wrote in message
...

if they are not the same diameter, the levels will not be the same.


strike that. I am thinking of something else. (don't know what).

--
Steve Barker
remove the "not" from my address to email

On 6/5/2012 4:48 PM, Stormin Mormon wrote:
Whack! Consider yourself struck.

Christopher A. Young
Learn more about Jesus
www.lds.org
.

"Steve wrote in message
...

if they are not the same diameter, the levels will not be the same.


strike that. I am thinking of something else. (don't know what).


the bad thing about usenet or email. You can't delete them when you
mess up. VBG

--
Steve Barker
remove the "not" from my address to email

That's for sure. I've done at least a few dumb
bunny stunts, over the years. Mostly when I'm
tired, and dehydrated.

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"Steve Barker" wrote in message
...

the bad thing about usenet or email. You can't delete them when you
mess up. VBG

--
Steve Barker
remove the "not" from my address to email

Any chance there might be some kind of anti-backup valve built into
the either of these faucets? Unless they're connected with aquarium
tubing, they should have equalized quickly and a little air in the
hose would not have mattered. How much of a difference is there? Are
we talking millimeters or inches?

On Jun 5, 9:27*am, dgk wrote:
On Tue, 05 Jun 2012 09:08:12 -0500, dpb wrote:
On 6/5/2012 8:16 AM, dgk wrote:
...

... One is an actual rainbarrel, with faucet already installed:

...
... I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.
...

Eventually, it should definitely reach the same level. *Since the one
only I presume is connected to the downspout the differential filling
will be pronounced in its favor and apparently there's sufficient
pressure drop/friction loss to add a significant head on the one side
relative to the other. *But, that's a dynamic loss that eventually
gravity equal pressure external should overcome and the levels will
equalize. *Unless there's a cover that's building a pressure dome over
one side or other interfering issue.

There's a wikipedia article on water columns I just looked at to refer
you to altho I forgot to copy the link, sorry, it wasn't hard to find...

I was really puzzled because I would have bet that they'd end up the
same height. Maybe they will equalize after some time.- Hide quoted text -

- Show quoted text -

You have to make sure the ground itself is reeally level!!!

On Jun 5, 7:08*am, dpb wrote:
On 6/5/2012 8:16 AM, dgk wrote:
...





... One is an actual rainbarrel, with faucet already installed:

...
... I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

...

Eventually, it should definitely reach the same level. *Since the one
only I presume is connected to the downspout the differential filling
will be pronounced in its favor and apparently there's sufficient
pressure drop/friction loss to add a significant head on the one side
relative to the other. *But, that's a dynamic loss that eventually
gravity equal pressure external should overcome and the levels will
equalize. *Unless there's a cover that's building a pressure dome over
one side or other interfering issue.

There's a wikipedia article on water columns I just looked at to refer
you to altho I forgot to copy the link, sorry, it wasn't hard to find...

--

One way they could differ but it would take laboratory grade/accurate
instuments to see it.

One barrel in the sun, the other in the shade.

That is another way to screw up using a water level. Because the
water level uses very small diameter tubing, the effect is enought to
be noticeable.

Harry K

Harry K

Steve Barker wrote:
On 6/5/2012 10:22 AM, Steve Barker wrote:
On 6/5/2012 8:16 AM, dgk wrote:
It's too long since I took physics but I thought that the height
would be equal. One is an actual rainbarrel, with faucet already
installed:
http://www.rainbarrelstorage.com/goo...40-p-7851.html


I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up
so fast that I figured I'd add another barrel to double the
capacity. I took an old Rubbermaid plastic garbage can, installed a
faucet near the bottom, used a Y adapter on each faucet, and a
female-female hose to link the two barrels, leaving one tap
available on each one for a hose. Both barrels are raised on
cinderblocks to the same height. Once I turned on the connecting hose,
the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but
again, the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected
by a hose, will not be the same but will vary depending on the
diameter or width of the barrels? Not what I remember, but that
wouldn't be the first time.





if they are not the same diameter, the levels will not be the same.


strike that. I am thinking of something else. (don't know what).

Neither does anyone else

--

dadiOH
____________________________

dadiOH's dandies v3.06...
....a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico

On Tue, 5 Jun 2012 12:14:53 -0400, "Dave M."
wrote:

dgk,


Both are on a couple of cinderblocks so the base is at the same height
off the ground. The Rubbermaid is about 8" taller.

This seems to avoid Harry K's point. If I put a barrel on top of 2
cinderblocks at the bottom of a hill and then put a barrel on top of 2
cinderblocks at the top of the very same hill, the fact that each barrel is
only 2 cinderblocks up from the ground is not especially relevant.
The water columns should be the same height from the Earth's center of
mass (or whatever) when they equalize. I'm having a hard time believing that
the resistance through the various faucets would be enough to slow the
equalization markedly.

Good point, but they're right next to each other so they're both at
the same height off the ground.

On Tue, 5 Jun 2012 09:52:53 -0700 (PDT), Sonny
wrote:

What is the interior diameter of the connecting hose?

A water level is a hose, with water, and a vertical guage at each end
of the hose, used for leveling or determining the level of a surface.
I have one 75' long, with a hose of 1/2" interior diameter hose.

Your connecting hose can not have an interior diameter of 3/8" or
less, or, like a water level, it will not work properly by leveling
itself off. Air pockets are most likely to get trapped and affect a
water level when using a tube or hose of 3/8" or less (in interior
diameter), also, and that is why water level hoses must have an
interior diameter of greater than 3/8". Osmotic pressure!!!

Sonny

Connecting hose is pretty cheap garden hose, maybe 3/4" outside
diameter. There could be some narrowing because I cut off the male end
and used a plastic female adapter.

On Tue, 5 Jun 2012 21:24:20 -0700 (PDT), Harry K
wrote:

On Jun 5, 7:08*am, dpb wrote:
On 6/5/2012 8:16 AM, dgk wrote:
...





... One is an actual rainbarrel, with faucet already installed:

...
... I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

...

Eventually, it should definitely reach the same level. *Since the one
only I presume is connected to the downspout the differential filling
will be pronounced in its favor and apparently there's sufficient
pressure drop/friction loss to add a significant head on the one side
relative to the other. *But, that's a dynamic loss that eventually
gravity equal pressure external should overcome and the levels will
equalize. *Unless there's a cover that's building a pressure dome over
one side or other interfering issue.

There's a wikipedia article on water columns I just looked at to refer
you to altho I forgot to copy the link, sorry, it wasn't hard to find...

--

One way they could differ but it would take laboratory grade/accurate
instuments to see it.

One barrel in the sun, the other in the shade.

That is another way to screw up using a water level. Because the
water level uses very small diameter tubing, the effect is enought to
be noticeable.


Maybe it's sort of an optical illusion. When I get home today I'm
going to stick a ruler down each one and see just how high the water
is.

On Tue, 5 Jun 2012 11:02:07 -0700 (PDT), Chip C
wrote:

On Jun 5, 8:16*am, dgk wrote:
It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...-gallon-rain-b...

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.

How different are the water levels?

And how are you measuring it? The barrels are some distance apart,
probably one's taller than the other; you sure it's not a trick of the
eye?

Chip C
Toronto

They are next to each other but I was just using the old eye, and the
eye is getting old. At first there was a large difference but it
looked much smaller yesterday. When I get home I'm going to stick a
ruler and and know for sure.

On Tue, 5 Jun 2012 17:19:53 -0700 (PDT), Larry Fishel
wrote:

Any chance there might be some kind of anti-backup valve built into
the either of these faucets? Unless they're connected with aquarium
tubing, they should have equalized quickly and a little air in the
hose would not have mattered. How much of a difference is there? Are
we talking millimeters or inches?

Inches, but I'll check exactly tonight.

dgk wrote:


Maybe it's sort of an optical illusion. When I get home today I'm
going to stick a ruler down each one and see just how high the water
is.

Observation: That won't work if the bottoms are not even with each other.

"HeyBub" wrote in message
m...
dgk wrote:


Maybe it's sort of an optical illusion. When I get home today I'm
going to stick a ruler down each one and see just how high the water
is.

Observation: That won't work if the bottoms are not even with each other.


The bottoms don't need to be even with each other
He has only to define a baseline ABOVE the barrels and measure down to the
water level to verify.
Eg Put a 2x4 on top of the taller barrel, so that it overhangs the other
one, and then measure down from the 2x4

On Tuesday, June 5, 2012 10:27:28 AM UTC-4, dgk wrote:
I was really puzzled because I would have bet that they'd end up the
same height. Maybe they will equalize after some time.

Nope, the level should have equalized fairly quickly. Speed only dependent on how fast the water could flow from barrel to barrel.

You are using the wrong point of reference for your measurement of height.

The water levels must be measured using the SAME point of reference.

I bet if you take an 8' bubble level, and suspend it over both barrels such that it is level, and measure from that level to the surface of the water in each barrel, the levels will be the same on both barrels.

On Thu, 07 Jun 2012 10:42:07 -0500, Atila Iskander wrote:
The bottoms don't need to be even with each other He has only to define
a baseline ABOVE the barrels and measure down to the water level to
verify.
Eg Put a 2x4 on top of the taller barrel, so that it overhangs the
other one, and then measure down from the 2x4

.... just not a 2x4 from HD, because theirs are usually banana-shaped :-)

On Jun 7, 6:23*am, dgk wrote:
On Tue, 5 Jun 2012 17:19:53 -0700 (PDT), Larry Fishel

wrote:
Any chance there might be some kind of anti-backup valve built into
the either of these faucets? Unless they're connected with aquarium
tubing, they should have equalized quickly and a little air in the
hose would not have mattered. How much of a difference is there? Are
we talking millimeters or inches?

Inches, but I'll check exactly tonight.

Be sure, I mean _really_ sure, that the barrels are at the identical
height or betyter, put a 2/xv or other straight edge from one to the
other and level it, then measure from the straight edge.

Basically if you are positive the level is different in the barrels
after
measureing from a level item you will be famous. Physicists from all
over the coutnry will be pouring into your place.

Harry K

On Thu, 7 Jun 2012 10:42:07 -0500, "Atila Iskander"
wrote:


"HeyBub" wrote in message
om...
dgk wrote:


Maybe it's sort of an optical illusion. When I get home today I'm
going to stick a ruler down each one and see just how high the water
is.

Observation: That won't work if the bottoms are not even with each other.


The bottoms don't need to be even with each other
He has only to define a baseline ABOVE the barrels and measure down to the
water level to verify.
Eg Put a 2x4 on top of the taller barrel, so that it overhangs the other
one, and then measure down from the 2x4

OK if he uses a level instead of his "old eyes"

OK if he uses a level instead of his "old eyes"- Hide quoted text -

- Show quoted text -

He stated he use "the old eye", i.e., singular. Hence, he has only
one old eye. Maybe he should use his other younger eye and the level.

This concept is taught in 3rd grade Physics. Some of you need to take a
refresher class. Sheeeeeeeesh!

On Tue, 05 Jun 2012 09:16:25 -0400, dgk wrote:

It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.



Many years ago I had a similar problem while using a "water level."
Here is the trick to using a water level, and possibly, the reason to
your dilemma.

1. Fill a long enough length of clear tubing to successfully conduct
the test (probably more than a minimum of 10 feet).

2. Hold both ends up next to a wall and make a mark where the water
level is. Both ends will have an equal height.

3. Do not move one end (we'll call that the "fixed" end) from where
the mark was made but move the other end (we'll call that the
"moveable" end) to another wall (or whatever) where you want to find
an equal height to the fixed end.

4. Unless you are extremely lucky where you place the moveable end
you will notice the fixed end water level has changed from it's
initial location. Move the moveable end of the tube either up or down
to "correct" the water level of the fixed end. Once the water level
of the fixed end is again even with the initial reference mark the
water level at the moveable end will be at the same height.

On 6/7/2012 3:29 PM, Gordon Shumway wrote:
On Tue, 05 Jun 2012 09:16:25 -0400, wrote:

It's too long since I took physics but I thought that the height would
be equal. One is an actual rainbarrel, with faucet already installed:

http://www.rainbarrelstorage.com/goo...40-p-7851.html

I paid a lot less than that but still more than a barrel should cost
even though it comes with a faucet already installed. It filled up so
fast that I figured I'd add another barrel to double the capacity. I
took an old Rubbermaid plastic garbage can, installed a faucet near
the bottom, used a Y adapter on each faucet, and a female-female hose
to link the two barrels, leaving one tap available on each one for a
hose. Both barrels are raised on cinderblocks to the same height.

Once I turned on the connecting hose, the water did flow from the
original one to the Rubbermaid, but stopped before the water heights
equalized. I checked the connection but there was no blockage. I
walked away puzzled.

It rained some yesterday, and both barrels are much fuller, but again,
the water heights are not identical.

So I guess the height of water in two dissimilar barrels, connected by
a hose, will not be the same but will vary depending on the diameter
or width of the barrels? Not what I remember, but that wouldn't be the
first time.



Many years ago I had a similar problem while using a "water level."
Here is the trick to using a water level, and possibly, the reason to
your dilemma.

1. Fill a long enough length of clear tubing to successfully conduct
the test (probably more than a minimum of 10 feet).

2. Hold both ends up next to a wall and make a mark where the water
level is. Both ends will have an equal height.

3. Do not move one end (we'll call that the "fixed" end) from where
the mark was made but move the other end (we'll call that the
"moveable" end) to another wall (or whatever) where you want to find
an equal height to the fixed end.

4. Unless you are extremely lucky where you place the moveable end
you will notice the fixed end water level has changed from it's
initial location. Move the moveable end of the tube either up or down
to "correct" the water level of the fixed end. Once the water level
of the fixed end is again even with the initial reference mark the
water level at the moveable end will be at the same height.

You can mitigate this problem by putting a reservoir at the stationary
end so small changes in volume don't change the level much.