Tub/Shower Combo Drain

tfratzel · Jan 20, 2005

I'm replacing my existing tub (with tiled walls for shower combo). The existing drain and trap are 1 1/2". Should I keep the 1 1/2" or replace both with 2" horizontal drain and trap?

Thanks in advance for all the great help everyone has given me so far.

hj · Jan 20, 2005

tub

2" would be better because it is almost twice as large as 1 1/2", but how would you increase the size of the fitting where it connects to the main system? You cannot reduce back down to 1 1/2" at that point, the connection would have to be increased to 2" also.

Sponsor · 2022-01-29T12:20:58-0800

tfratzel · Jan 20, 2005

Right now the 1 1/2" drain connects with a wye to a 2" horizontal that goes into the main vertical stack. Sounds like i should just replace the old 1 1/2" with 2" into the 2" horizontal.

Plumber2000 · Jan 20, 2005

Go with 2"

Tub/Shower Combo Drain

tfratzel

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hj

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tfratzel

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Plumber2000

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