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John Larkin September 17th 07 03:09 AM

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1 Attachment(s)
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John




Martin Riddle September 17th 07 03:42 AM

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"John Larkin" wrote in message
...
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John




LOL
Yes, Public works dollars at work.

Cheers




PhattyMo September 17th 07 10:23 AM

new mouse pad - MousePad.JPG
 
John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John



Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*

John Larkin September 17th 07 03:04 PM

new mouse pad - MousePad.JPG
 
On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
wrote:

John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John



Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


I've always thought it interesting that, under every city, there's
another set of structures we never see: foundations, caissons,
transformer vaults, pumping stations, subway tunnels, water and gas
distribution, wire and fiberoptics communications, and one or often
two separate wastewater systems, all sorts of things. I'm an
electrical engineer, but civil engineering really impresses me.

OK, some people don't think of stuff like this, and would rather watch
reruns of "Gunsmoke" without thinking about the cable distribution
system underneath the streets.

John


Tom2000 September 17th 07 04:42 PM

new mouse pad - MousePad.JPG
 
On Sun, 16 Sep 2007 19:09:54 -0700, John Larkin
wrote:

We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John


Cool!

In the '80s, a student of mine got a job working there. She was doing
all sorts of interesting instrumentation projects. I visited her at
work once, and was very impressed.

Sounds like, in the time since then and now, they've built themselves
a PR department. DVD? That's a surprise!

Be careful how you use that compost. I don't know how it is now, but
there used to be a problem with heavy metal contamination of that
stuff.

Tom


Al September 17th 07 04:49 PM

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On Mon, 17 Sep 2007 07:04:24 -0700, John Larkin wrote:

On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
wrote:

John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John



Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


I've always thought it interesting that, under every city, there's
another set of structures we never see: foundations, caissons,
transformer vaults, pumping stations, subway tunnels, water and gas
distribution, wire and fiberoptics communications, and one or often
two separate wastewater systems, all sorts of things. I'm an
electrical engineer, but civil engineering really impresses me.

OK, some people don't think of stuff like this, and would rather watch
reruns of "Gunsmoke" without thinking about the cable distribution
system underneath the streets.

John


Check this out:

http://www.geocities.com/thslone/sewer.html

Just do a google on sewer tours.

Al

Al

Joel Kolstad September 17th 07 05:07 PM

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"BobW" wrote in message
...
Not to mention all those Morlocks living down there...


No, no, it's clearly... http://www.imdb.com/title/tt0087015/



qrk September 17th 07 08:07 PM

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On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
wrote:

John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John



Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


Why in the world would you pass up such an interesting tour unless
you're the type that sits around watching Oprah for all your
informational needs. Large industrial/civil processes are quite
interesting.

PhattyMo September 17th 07 08:43 PM

new mouse pad - MousePad.JPG
 
qrk wrote:
On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
wrote:

John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John


Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


Why in the world would you pass up such an interesting tour unless
you're the type that sits around watching Oprah for all your
informational needs. Large industrial/civil processes are quite
interesting.


Don't get me wrong,I find it interesting too...I'm fascinated by the
local water system,it comes to town in giant pipes,and is collected in
various tanks,some *in* a big hill behind my house..

Sewers and lift pumps,etc. are interesting too...

But not interesting enough to crawl into them....EWW!

Rich Grise September 17th 07 09:29 PM

new mouse pad - MousePad.JPG
 
On Mon, 17 Sep 2007 19:07:27 +0000, qrk wrote:
On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.


Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


Why in the world would you pass up such an interesting tour unless
you're the type that sits around watching Oprah for all your
informational needs. Large industrial/civil processes are quite
interesting.


When I went skydiving in Baldwin, WI fifteen or twenty years ago, the
drop zone had a big huge sewage treatment thing next to it, which
they called the "turd swirl". They recommended that if your main
chute and backup both malfunction, to aim for it, because it would
be softer than the ground. =:-O

Interestingly, there was no noticeable odor from it.

Cheers!
Rich


Rich Grise September 17th 07 09:30 PM

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On Sun, 16 Sep 2007 19:09:54 -0700, John Larkin wrote:

We went by the Southeast sewage treatment plant and picked up six free
sacks of compost.


Did they call it "Milorganite?" My Dad used to buy that stuff for the
garden.

Thanks!
Rich


Jim Thompson September 17th 07 11:33 PM

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On Mon, 17 Sep 2007 19:07:27 GMT, qrk wrote:

On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
wrote:

John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John



Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


Why in the world would you pass up such an interesting tour unless
you're the type that sits around watching Oprah for all your
informational needs. Large industrial/civil processes are quite
interesting.


Yep. When I was scouting out universities while I was still in high
school there was a demonstration at the University of Cincinnati of a
sewer mechanism to handle low flow neighborhoods.... a cistern filled
up with sewage and water until it reached a certain critical level,
then flushed itself... no moving parts.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

John B[_2_] September 17th 07 11:52 PM

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On 17/09/2007 John Larkin wrote:

On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
wrote:

John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six

free sacks of compost. They loaded them into the car for us, gave
us their DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done

the Sewers of Paris tour, so it will be interesting to compare.

John



Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


I've always thought it interesting that, under every city, there's
another set of structures we never see: foundations, caissons,
transformer vaults, pumping stations, subway tunnels, water and gas
distribution, wire and fiberoptics communications, and one or often
two separate wastewater systems, all sorts of things. I'm an
electrical engineer, but civil engineering really impresses me.

OK, some people don't think of stuff like this, and would rather watch
reruns of "Gunsmoke" without thinking about the cable distribution
system underneath the streets.

John


Underneath parts of Edinburgh, there are complete streets which have
been built over and are now open to tourists.

http://www.edinburgh.gov.uk/internet...o_Edinburgh/Ed
inburgh%20facts/CEC_hidden_edinburgh

--
John B

Joel Kolstad September 18th 07 01:23 AM

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"John B" wrote in message
t...
Underneath parts of Edinburgh, there are complete streets which have
been built over and are now open to tourists.


This is true in some U.S. cities as well, such as Seattle that was re-built at
least once (I believe it's actually been rebuilt several times -- fire did it
in once too) after severe flooding in the city's early days. The original
"street level" is something like 10' below the current "street level."

It is really cool to see all these old underground "ghost" towns.



John Larkin September 18th 07 04:11 AM

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On Mon, 17 Sep 2007 08:42:18 -0700, Tom2000
wrote:

On Sun, 16 Sep 2007 19:09:54 -0700, John Larkin
wrote:

We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John


Cool!

In the '80s, a student of mine got a job working there. She was doing
all sorts of interesting instrumentation projects. I visited her at
work once, and was very impressed.

Sounds like, in the time since then and now, they've built themselves
a PR department. DVD? That's a surprise!

Be careful how you use that compost. I don't know how it is now, but
there used to be a problem with heavy metal contamination of that
stuff.

Tom



Tom Del Rosso September 18th 07 05:15 AM

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"Jim Thompson" wrote
in message

Yep. When I was scouting out universities while I was still in high
school there was a demonstration at the University of Cincinnati of a
sewer mechanism to handle low flow neighborhoods.... a cistern filled
up with sewage and water until it reached a certain critical level,
then flushed itself... no moving parts.


How did it retain and release the sewage with no moving parts?


--

Reply in group, but if emailing add another
zero, and remove the last word.



Sjouke Burry[_2_] September 18th 07 05:20 AM

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John Larkin wrote:
On Mon, 17 Sep 2007 08:42:18 -0700, Tom2000
wrote:

On Sun, 16 Sep 2007 19:09:54 -0700, John Larkin
wrote:

We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

John

Cool!

In the '80s, a student of mine got a job working there. She was doing
all sorts of interesting instrumentation projects. I visited her at
work once, and was very impressed.

Sounds like, in the time since then and now, they've built themselves
a PR department. DVD? That's a surprise!

Be careful how you use that compost. I don't know how it is now, but
there used to be a problem with heavy metal contamination of that
stuff.

Tom


As long as you dont eat what you grow, there is no problem.....

Jim Thompson September 18th 07 05:49 AM

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On Tue, 18 Sep 2007 00:15:13 -0400, "Tom Del Rosso"
wrote:

"Jim Thompson" wrote
in message

Yep. When I was scouting out universities while I was still in high
school there was a demonstration at the University of Cincinnati of a
sewer mechanism to handle low flow neighborhoods.... a cistern filled
up with sewage and water until it reached a certain critical level,
then flushed itself... no moving parts.


How did it retain and release the sewage with no moving parts?


Just like a toilet does when you exceed a certain water level in the
bowl.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

Tom Del Rosso September 18th 07 06:13 AM

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"Jim Thompson" wrote
in message
On Tue, 18 Sep 2007 00:15:13 -0400, "Tom Del Rosso"
wrote:

"Jim Thompson" wrote
in message

Yep. When I was scouting out universities while I was still in high
school there was a demonstration at the University of Cincinnati of
a sewer mechanism to handle low flow neighborhoods.... a cistern
filled up with sewage and water until it reached a certain critical
level, then flushed itself... no moving parts.


How did it retain and release the sewage with no moving parts?


Just like a toilet does when you exceed a certain water level in the
bowl.


Ok, but a toilet only works if the level increases rapidly. If you let
water trickle into it slowly, then it just flows over the bend without
creating suction.


--

Reply in group, but if emailing add another
zero, and remove the last word.



Chuck Harris September 18th 07 02:23 PM

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Tom Del Rosso wrote:
"Jim Thompson" wrote
in message
Yep. When I was scouting out universities while I was still in high
school there was a demonstration at the University of Cincinnati of a
sewer mechanism to handle low flow neighborhoods.... a cistern filled
up with sewage and water until it reached a certain critical level,
then flushed itself... no moving parts.


How did it retain and release the sewage with no moving parts?


This is a common technique used in some septic tanks to give the drainage
field a break. The tank is broken into two chambers. The first chamber
holds the nasty stuff, and overflows into the second chamber. The second
chamber has a pipe that comes up from its bottom, and performs an upside
down "U" bend that goes back to the bottom (inlet). When the tank fills
enough to make the water fall over the top of the "U" bend, it forms a
siphon which draws all of the water out of the chamber.

In the case of a septic tank, the pipe that forms the "U" bend has to be
sized small enough that a toilet flush will cause it to fill completely
and start the siphon. This is not a problem, because the second chamber
has nothing but water in it. For a municipal sewage system, the bend would
have to be sized based on the usual usual flow surges that occur in the
sewer lines.

-Chuck


Jim Thompson September 18th 07 03:15 PM

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On Tue, 18 Sep 2007 01:13:34 -0400, "Tom Del Rosso"
wrote:

"Jim Thompson" wrote
in message
On Tue, 18 Sep 2007 00:15:13 -0400, "Tom Del Rosso"
wrote:

"Jim Thompson" wrote
in message

Yep. When I was scouting out universities while I was still in high
school there was a demonstration at the University of Cincinnati of
a sewer mechanism to handle low flow neighborhoods.... a cistern
filled up with sewage and water until it reached a certain critical
level, then flushed itself... no moving parts.

How did it retain and release the sewage with no moving parts?


Just like a toilet does when you exceed a certain water level in the
bowl.


Ok, but a toilet only works if the level increases rapidly. If you let
water trickle into it slowly, then it just flows over the bend without
creating suction.


I've been scratching my head all night trying to remember... this was
the Fall of 1957 ;-) I do remember a rather significant siphon, and
watching the trickle stream entering and then who-o-o-osh!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

Tom Del Rosso September 18th 07 04:03 PM

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"Chuck Harris" wrote in message


This is a common technique used in some septic tanks to give the
drainage field a break. The tank is broken into two chambers. The
first chamber holds the nasty stuff, and overflows into the second
chamber. The second chamber has a pipe that comes up from its
bottom, and performs an upside down "U" bend that goes back to the
bottom (inlet). When the tank fills enough to make the water fall
over the top of the "U" bend, it forms a siphon which draws all of
the water out of the chamber.

In the case of a septic tank, the pipe that forms the "U" bend has to
be sized small enough that a toilet flush will cause it to fill
completely and start the siphon.


So those low-flush toilets that people are forced to use might make their
tanks obsolete.


This is not a problem, because the
second chamber has nothing but water in it. For a municipal sewage
system, the bend would have to be sized based on the usual usual flow
surges that occur in the sewer lines.

-Chuck


Tanks.

(The pun was accidental but I decided to leave it.)

--

Reply in group, but if emailing add another
zero, and remove the last word.



Ecnerwal September 18th 07 04:09 PM

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In article ,
Jim Thompson wrote:

On Tue, 18 Sep 2007 01:13:34 -0400, "Tom Del Rosso"
wrote:
Ok, but a toilet only works if the level increases rapidly. If you let
water trickle into it slowly, then it just flows over the bend without
creating suction.


I've been scratching my head all night trying to remember... this was
the Fall of 1957 ;-) I do remember a rather significant siphon, and
watching the trickle stream entering and then who-o-o-osh!


Google is overwhelmed with beer and wine autosiphons, but the type in
question is a common septic device - pulsing effluent into a drain field
is much better than trickling it in. They work by using an "air bell" of
an engineered size which prevents the start of siphoning until enough
water has built up for a good run, and then makes for a strong flow -
but explaining without refreshing my memory and having a good diagram is
not working too well.

Here's a site with a pretty good diagram and explanation:

http://www.siphons.com/operation.html

--
Cats, coffee, chocolate...vices to live by

Jim Thompson September 18th 07 04:13 PM

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On Tue, 18 Sep 2007 15:09:33 GMT, Ecnerwal
wrote:

In article ,
Jim Thompson wrote:

On Tue, 18 Sep 2007 01:13:34 -0400, "Tom Del Rosso"
wrote:
Ok, but a toilet only works if the level increases rapidly. If you let
water trickle into it slowly, then it just flows over the bend without
creating suction.


I've been scratching my head all night trying to remember... this was
the Fall of 1957 ;-) I do remember a rather significant siphon, and
watching the trickle stream entering and then who-o-o-osh!


Google is overwhelmed with beer and wine autosiphons, but the type in
question is a common septic device - pulsing effluent into a drain field
is much better than trickling it in. They work by using an "air bell" of
an engineered size which prevents the start of siphoning until enough
water has built up for a good run, and then makes for a strong flow -
but explaining without refreshing my memory and having a good diagram is
not working too well.

Here's a site with a pretty good diagram and explanation:

http://www.siphons.com/operation.html


Thanks! That's a good link!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

Jim Thompson September 18th 07 04:15 PM

new mouse pad - MousePad.JPG
 
On Tue, 18 Sep 2007 11:03:03 -0400, "Tom Del Rosso"
wrote:

"Chuck Harris" wrote in message


This is a common technique used in some septic tanks to give the
drainage field a break. The tank is broken into two chambers. The
first chamber holds the nasty stuff, and overflows into the second
chamber. The second chamber has a pipe that comes up from its
bottom, and performs an upside down "U" bend that goes back to the
bottom (inlet). When the tank fills enough to make the water fall
over the top of the "U" bend, it forms a siphon which draws all of
the water out of the chamber.

In the case of a septic tank, the pipe that forms the "U" bend has to
be sized small enough that a toilet flush will cause it to fill
completely and start the siphon.


So those low-flush toilets that people are forced to use might make their
tanks obsolete.


This is not a problem, because the
second chamber has nothing but water in it. For a municipal sewage
system, the bend would have to be sized based on the usual usual flow
surges that occur in the sewer lines.

-Chuck


Tanks.

(The pun was accidental but I decided to leave it.)


Sno-o-o-ort!

I'm like the felon in Massachusetts, I flush twice ;-)

I'm about to install "air-flush" units... a bit noisy, but never stop
up.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

Rich Grise September 18th 07 06:32 PM

new mouse pad - MousePad.JPG
 
On Mon, 17 Sep 2007 08:35:03 -0700, BobW wrote:
"John Larkin" wrote in message
On Mon, 17 Sep 2007 02:23:47 -0700, PhattyMo
John Larkin wrote:
We went by the Southeast sewage treatment plant and picked up six free
sacks of compost. They loaded them into the car for us, gave us their
DVD "The Sewers of San Francisco", and a free mouse pad!

They have real tours, too; we'll have to schedule one. I've done the
Sewers of Paris tour, so it will be interesting to compare.

Why in the world would you subject yourself to a tour of a SEWER?
*Baffled*


I've always thought it interesting that, under every city, there's
another set of structures we never see: foundations, caissons,
transformer vaults, pumping stations, subway tunnels, water and gas
distribution, wire and fiberoptics communications, and one or often
two separate wastewater systems, all sorts of things. I'm an
electrical engineer, but civil engineering really impresses me.

OK, some people don't think of stuff like this, and would rather watch
reruns of "Gunsmoke" without thinking about the cable distribution
system underneath the streets.


Not to mention all those Morlocks living down there...

http://www.imdb.com/gallery/mptv/136...hint=tt0054387


Heck, with all those giant alligators, who needs Morlocks? ;-)
http://www.google.com/search?hl=en&q...lligator+sewer

Cheers!
Rich



Rich Grise September 18th 07 06:36 PM

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On Mon, 17 Sep 2007 17:23:08 -0700, Joel Kolstad wrote:

"John B" wrote in message
t...
Underneath parts of Edinburgh, there are complete streets which have
been built over and are now open to tourists.


This is true in some U.S. cities as well, such as Seattle that was re-built at
least once (I believe it's actually been rebuilt several times -- fire did it
in once too) after severe flooding in the city's early days. The original
"street level" is something like 10' below the current "street level."

It is really cool to see all these old underground "ghost" towns.


Back at the Univ. of Minn., there was a legend that there were "steam
tunnels", and supposedly, you could get to them through the dorm basement,
and follow them to the basements of the girls' dorms, and go on panty
raids and stuff.

I never actually saw one, however. )-; (or a panty raid! D-; )

Thanks!
Rich



Richard The Dreaded Libertarian September 18th 07 06:42 PM

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On Tue, 18 Sep 2007 11:03:03 -0400, Tom Del Rosso wrote:
"Chuck Harris" wrote in message

This is a common technique used in some septic tanks to give the
drainage field a break. The tank is broken into two chambers. The
first chamber holds the nasty stuff, and overflows into the second
chamber. The second chamber has a pipe that comes up from its
bottom, and performs an upside down "U" bend that goes back to the
bottom (inlet). When the tank fills enough to make the water fall
over the top of the "U" bend, it forms a siphon which draws all of
the water out of the chamber.

In the case of a septic tank, the pipe that forms the "U" bend has to
be sized small enough that a toilet flush will cause it to fill
completely and start the siphon.


So those low-flush toilets that people are forced to use might make their
tanks obsolete.


"Low-flush" toilets are a joke. They never flush properly, so you have
to flush them two or three times, so the net result is that they waste
_more_ water! I had an apartment in San Pedro, where they had modified
the ball valve/flapper valve, such that it would sink when the tank
got about half-empty. It didn't flush completely, so I got into the
habit of holding down the flush lever until it finished, which of course
defeated the purpose of the "water-saving" feature.

Cheers!
Rich


Joel Kolstad September 18th 07 07:17 PM

new mouse pad - MousePad.JPG
 
"Rich Grise" wrote in message
...
Back at the Univ. of Minn., there was a legend that there were "steam
tunnels", and supposedly, you could get to them through the dorm basement,
and follow them to the basements of the girls' dorms, and go on panty
raids and stuff.


The Univ. of Wisconsin has steam tunnels as well, but by the time I was there
the rumor was they were pretty well-monitored security-wise with door switches
and motion detectors... and that you could get into some pretty serious
trouble if you were caught. Apparently people still went anyway, but just
kept the durations particular short. (And supposedly a lot of the security
was due to there being a fair amount of danger down there if you didn't know
what you were doing or were inebriated... I have a former co-worker who'd been
a submariner and had various chilling tales about what high-pressure steam
could do to you...)

UW article: http://www.news.wisc.edu/3486 -- I'm not sure I believe the part
that, "there's only one way into the tunnels." I would believe, "there's only
one way you're *supposed* to enter the tunnels..."




Jim Thompson September 18th 07 07:21 PM

new mouse pad - MousePad.JPG
 
On Tue, 18 Sep 2007 11:17:16 -0700, "Joel Kolstad"
wrote:

"Rich Grise" wrote in message
.. .
Back at the Univ. of Minn., there was a legend that there were "steam
tunnels", and supposedly, you could get to them through the dorm basement,
and follow them to the basements of the girls' dorms, and go on panty
raids and stuff.


The Univ. of Wisconsin has steam tunnels as well, but by the time I was there
the rumor was they were pretty well-monitored security-wise with door switches
and motion detectors... and that you could get into some pretty serious
trouble if you were caught. Apparently people still went anyway, but just
kept the durations particular short. (And supposedly a lot of the security
was due to there being a fair amount of danger down there if you didn't know
what you were doing or were inebriated... I have a former co-worker who'd been
a submariner and had various chilling tales about what high-pressure steam
could do to you...)

UW article: http://www.news.wisc.edu/3486 -- I'm not sure I believe the part
that, "there's only one way into the tunnels." I would believe, "there's only
one way you're *supposed* to enter the tunnels..."



At MIT we used to go from building to building thru the steam tunnels
during bad snow storms.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

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