Home Girl
New Member
I am reading that the tub drain should be 1 1/2" while a shower drain should be 2". If a tub/shower combo is installed, can a standard tub drain be used, or does that require a larger shower drain?
Drain size for tub/shower combination
- Thread starter Home Girl
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FloridaOrange
Plumbing Designer
What do you mean by tub/shower combo? Tub with a shower head? If so the 1-1/2" drain will work. The idea is that the tub can provide holding space for water if the drain is slow, a shower doesn't offer much if any holding before you overflow the curb.
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Geniescience
Homeowner
The smaller size drain works.
It also works for showers too, and that used to be the size required by "Code" too. I think that bigger houses and longer distances are the reasons why its size was increased to 2".
It also works for showers too, and that used to be the size required by "Code" too. I think that bigger houses and longer distances are the reasons why its size was increased to 2".
Inspektor Ludwig
Journeyman/Inspector
Yes, you can have an 1 1/2 drain for tub/shower combo.
hj
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1 1/2"
You are too young to remember when a shower was permitted to have a 1 1/2" drain. I am also.
You are too young to remember when a shower was permitted to have a 1 1/2" drain. I am also.
FloridaOrange
Plumbing Designer
