Do I need to upgrade my 3" main drain to 4"?
Asked Mar 7, 2010, 03:01 PM
I am putting in a new bathroom and am wondering if my 3" main drain can handle the extra fixtures
Before the bathroom this is everything that drains to main....
What I will be adding
I just hate to put it all in and find out later I should have put in a 4" pipe, it still will be a pain in the a$$ because I have cut studs along the wall to accommodate the 3", but still better to ask this question now before walls are finished.