[Shipswake]

All,

I have a second floor bath which I am remodeling. There is an existing 3" stack through the roof.

I have a 2" line from the stack with a 1.5" lav drain and a 1.5" vent to the attic.

I also have a 2" line from the stack with a 2" shower drain and a 2" vent to the attic.

I am adding a tub

My question is:

Can I drain the tub on the lav line with the 1.5" vent? (I believe it should be a 2" vent)

Can I drain the tub on the 2" shower line?

Is there some combination that will work?

[massplumber2008]

Hi Shipswake...

Drain the tub into the 2" shower drain with the 2" vent. Here, the 2" vent/drain from the shower will be perfect to WET VENT the tub... ;)

If wet venting isn't allowed in your area then you will need to install a 2" x 1.5" wye into the shower drain (after the 2" vent connection) and run 1.5" over to the tub and then run 1.5" tub vent and connect into another vent at a minimum of 42" off the finish floor.

I'm betting you can wet vent the tub! Check with any local plumbing inspector and just ask if wet venting a tub with a 2"shower drain/2"vent is OK... it is in most states.

Let us know if you need more info...

MARK

[Shipswake]

Hi Shipswake....

Drain the tub into the 2" shower drain with the 2" vent. Here, the 2" vent/drain from the shower will be perfect to WET VENT the tub...;)

If wet venting isn't allowed in your area then you will need to install a 2" x 1.5" wye into the shower drain (after the 2" vent connection) and run 1.5" over to the tub and then run 1.5" tub vent and connect into another vent at a minimum of 42" off the finish floor.

I'm betting you can wet vent the tub! Check with any local plumbing inspector and just ask if wet venting a tub with a 2"shower drain/2"vent is OK...it is in most states.

Let us know if you need more info...

MARK

Thanks for the reply Mark

I am also in Ma, so I assume wet venting is OK.

[massplumber2008]

Absolutely OK here...

Connect into the shower drain... should be all set!