Wayne Whitney wrote:
On 2008-05-29, Speedy Jim wrote:


Back-to-back fixtures are plumbed into a Double Sanitary Tee, like
this one:

http://www.drillspot.com/products/28...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/36...le_Fixture_Tee

Cheers, Wayne

That would certainly prevent the problem. The house was built in 1969,
so maybe it wasn't required back then.

In response to others, the water flowed out the open trap even with
modest amounts of water running in the other sink from simply turning on
one faucet. In other words, I didn't fill one sink then try to empty it
quickly by raising the popup suddenly.

Now that the p-trap is reconnected, all is working properly.

Thanks to all who responded.

Ray