Latest Discussions : Plumbing


09:39AM | 03/16/04
Member Since: 01/27/04
4 lifetime posts
I live in CT. I am putting a 2nd floor addition on my house and I am adding 1 Full and 1 half bath on the 2nd floor right above the current bathroom on the 1st floor. The

venting system from the basement to the roof,

I am told, is a stack vent, which has my first floor toilet and bathroom sink that drains into it. The toilet drains approx.

6", my bathroom sink drains approx. 16" into

it. My question is can I put my second floor

2 toilets, 1 washer,1 jaccuzzi and 3 sinks

into the same stack vent and be up to code and pass inspection. If not what will I need to do to use that stack vent. The building inspector won't provide us with any information. There is really no room to go through the walls and add 3" piping on the 7' wall with all the existing plumbing.

Thank you in advance


plumber Tom

07:30AM | 03/17/04
Member Since: 05/10/03
801 lifetime posts
Gino, retros are alway's hard to conceal a new stack if you needed to add one. And a 3" stack might not be big enough. Each plumbing fixture is assigned a value called a "fixture unit" The units are then toataled and this determines the diameter of the stack. When your plumber applies for a permit he must list the fixture units on the permit. That in turn determines the price of the permit. Your building inspector might just be giving you a hard time because you have no permit. Try getting a few estimates from plumber's in your area. 3 is the norm, so you can compare prices. Ask each individual plumber about the best way to conceal the stack.

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