For a pumped CH system, is it better (where clearance allows) to bend pipes
than to use soldered couplers?

Ta

Pete

PM wrote:
For a pumped CH system, is it better (where clearance allows) to bend
pipes than to use soldered couplers?

Ta

Pete

Where its permissable its always best to bend rather than joint, the less
joints you have the less chance of an upset later. ;-)
--
Sir Benjamin Middlethwaite

For a pumped CH system, is it better (where clearance allows) to bend
pipes
than to use soldered couplers?

It is always best to bend rather then elbow if it is possible. This applies
to any plumbing system. It reduces flow resistance and noise.

Christian.

Christian McArdle wrote:


It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and noise.

Christian.

I'm confused?

--
Sir Benjamin Middlethwaite

The3rd Earl Of Derby wrote:
Christian McArdle wrote:


It is always best to bend rather then elbow if it is possible.
This applies to any plumbing system. It reduces flow resistance
and noise.

Christian.

I'm confused?

turbulence, presumably.

It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and noise.

I'm confused?

How so?

Christian.

Christian McArdle wrote:
It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and
noise.

I'm confused?

How so?

Christian.

How you can say using elbows restricts flow rate and causes noise in the
system?

When the pipe is butted up into the elbow it makes contact with the ridge
in the elbow and is a perfect join providing the solder has made a good
airless joint.

--
Sir Benjamin Middlethwaite

When the pipe is butted up into the elbow it makes contact with the ridge
in the elbow and is a perfect join providing the solder has made a good
airless joint.

There are several noises associated.

1. The rapid change of direction of the water when using high flow rates
causes a hissing noise as there is lots of turbulence. A gradual bend does
not upset the flow of water or invoke turbulence.

2. When there is a rapid change in flow rate, such as when a modern tap or
toilet valve shuts off, the elbow gives a bigger jolt to the length of
pipework, so often makes louder bangings or scrapings, particularly when the
pipework is not firmly attached. A gradual bend doesn't provide any local
obstruction for a hammer to act against. The gradual bend can also flex
slightly, disipating any energy that does get expressed.

Christian.

The3rd Earl Of Derby wrote:
Christian McArdle wrote:
It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and
noise.

How you can say using elbows restricts flow rate and causes noise in the
system?

Because it does! Use swept bends.

"The3rd Earl Of Derby" wrote in message
k...
Christian McArdle wrote:
It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and
noise.

I'm confused?

How so?

Christian.

How you can say using elbows restricts flow rate and causes noise in the
system?

When the pipe is butted up into the elbow it makes contact with the ridge
in the elbow and is a perfect join providing the solder has made a good
airless joint.

However, that is entirely irrelevant. Elbows cause the fluid to change
direction much more abruptly than bends, which is what causes the
restriction in flow. The larger the bend radius the better, with the best
being a bend of infinite radius: i.e. a straight pipe.

Colin Bignell

Christian McArdle wrote:
It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and noise.
I'm confused?

How so?

Christian.



Can you drive faster and smoother round a sharp or wide bend?

Broadback wrote:
Christian McArdle wrote:
It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and
noise. I'm confused?

How so?

Christian.



Can you drive faster and smoother round a sharp or wide bend?

Thats irrelevent to the question.

--
Sir Benjamin Middlethwaite

The3rd Earl Of Derby wrote in message
k...
Christian McArdle wrote:


It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and noise.

Christian.

I'm confused?
Sir Benjamin Middlethwaite

i have noticed this




-

Mark wrote:
The3rd Earl Of Derby wrote in message
k...
Christian McArdle wrote:


It is always best to bend rather then elbow if it is possible. This
applies to any plumbing system. It reduces flow resistance and
noise.

Christian.

I'm confused?
Sir Benjamin Middlethwaite

i have noticed this




-

Go find you're snorkel gear.

--
Sir Benjamin Middlethwaite

PM wrote:
For a pumped CH system, is it better (where clearance allows) to bend pipes
than to use soldered couplers?


Bends are better.

I've just bought the 15/22mm pipe bending tool from toolstation
( http://www.toolstation.com/search.ht...tr=pipe+bender )
and although at first it feels like trying to put an octopus into a
tank (protrusions
going everywhere) the finished job looks pretty nifty.

Admittedly, I won't use the tool every day, but it's still a neat bit
of kit!

Mungo

Admittedly, I won't use the tool every day, but it's still a neat bit
of kit!

Yes, I wouldn't dream of using copper pipe without a bender handy. With a
bit of forethought (and a small dent on the pipe) you can made 180 degree
bends, too!

Christian.

"Christian McArdle" wrote in message
.. .
Admittedly, I won't use the tool every day, but it's still a neat bit
of kit!

Yes, I wouldn't dream of using copper pipe without a bender handy. With a
bit of forethought (and a small dent on the pipe) you can made 180 degree
bends, too!

I tried bending 22mm with a bending spring. Could only just bend it enough
to make the pipe wobble when rolled.
Got a pipe bender now - easy peasy!

PM wrote:
I tried bending 22mm with a bending spring. Could only just bend it enough
to make the pipe wobble when rolled.

If you anneal the pipe first, it's easy to bend with a spring, but...


Got a pipe bender now - easy peasy!

These do make it easy. A still spring has uses, though.

Another key advantage of swept/pulled bends is that they are less likely to
form a settling point for crud.
Having inherited a neglected 1970s installation with enough magnetite to
block some recently installed (not by me) plastic pipe, I know that every
little bit helps in flushing/cleaning operations. The reduced resistance to
flow in a swept bend will not just aid water flow, but will also help crud
to drain away too!

Phil

"TheScullster" wrote in message
...
Another key advantage of swept/pulled bends is that they are less likely
to form a settling point for crud.
Having inherited a neglected 1970s installation with enough magnetite to
block some recently installed (not by me) plastic pipe, I know that every
little bit helps in flushing/cleaning operations. The reduced resistance
to flow in a swept bend will not just aid water flow, but will also help
crud to drain away too!

Crud collects at the inserts of plastic piping, another poor point of this
system. There is a gap between the inside pipe wall and the insert. This is
the chamfer to aid slipping on the pipe.