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Plumbing - lavatory drains Ray K 05-29-2008
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Posted by Ray K on May 29, 2008, 4:43 pm
I have two back-to-back bathrooms. Their lavatories are also
back-to-back, and the same distance from the side wall. If I run the
faucet in bathroom A while the P-trap in bathroom B is open (waiting for
a repair part), the water from sink A will run out of the open trap in
bathroom B. Is this normal?



Posted by EXT on May 29, 2008, 5:00 pm
If they are installed with a "cross" or "X" fitting in the wall, likely
water will gush across the opening and come out the open trap on the other
side of the wall.

>I have two back-to-back bathrooms. Their lavatories are also back-to-back,
>and the same distance from the side wall. If I run the faucet in bathroom A
>while the P-trap in bathroom B is open (waiting for a repair part), the
>water from sink A will run out of the open trap in bathroom B. Is this
>normal?
>
>


Posted by evodawg on May 29, 2008, 5:11 pm
Ray K wrote:

> I have two back-to-back bathrooms. Their lavatories are also
> back-to-back, and the same distance from the side wall. If I run the
> faucet in bathroom A while the P-trap in bathroom B is open (waiting for
> a repair part), the water from sink A will run out of the open trap in
> bathroom B. Is this normal?
yes
--
"You can lead them to LINUX
but you can't make them THINK"
Running Mandriva release 2008.0 free-i586 using KDE on i586

Posted by Speedy Jim on May 29, 2008, 5:22 pm
Ray K wrote:
> I have two back-to-back bathrooms. Their lavatories are also
> back-to-back, and the same distance from the side wall. If I run the
> faucet in bathroom A while the P-trap in bathroom B is open (waiting for
> a repair part), the water from sink A will run out of the open trap in
> bathroom B. Is this normal?
>
>

Back-to-back fixtures are plumbed into a
Double Sanitary Tee, like this one:
http://tinyurl.com/44wyvs

(not necessarily this size one...)

Under low flow conditions, waste might not
cross over, but a sudden draining of the basin
might spill some out.



Jim

Posted by Wayne Whitney on May 29, 2008, 6:32 pm

> Back-to-back fixtures are plumbed into a Double Sanitary Tee, like
> this one:
>
>
http://www.drillspot.com/products/287050/Mueller_Industries_52820_3X3X2X2_Double_San_Tee

I thought they had to use a "double fixture fitting", slightly
different than a double sanitary tee. Like this one:

http://www.drillspot.com/products/364227/Approved_Vendor_02247G_Double_Fixture_Tee

Cheers, Wayne


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