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tregg
06-20-2010, 01:05 PM
I'm remodeling my kitchen. In the basement the washer drains into a vertical 2 1/2" pipe that stands about 4 feet tall. Is there a problem with running the new kitchen sink drain into that also? I can put a Y on top. Thanks!

Terry
06-20-2010, 01:15 PM
You can't dump an upstairs fixture into the top of the downstairs fixture.
It siphons the p-trap.

Any would would need to come in below the tee and p-trap.
The vent for the downstairs fixture would need to tie into the vent above at 42" above the floor.

http://terrylove.com/images/dwv_b2.jpg