The Family Handyman on MSN10 个月
How To Repair a Plumbing Vent in the Attic
First of all, going from 3-in. pipe to 4-in. is unusual, although it may be required by your local plumbing code. Sometimes ...
Safely, climb onto the roof and locate your plumbing vent; it's usually located above the bathroom. If the vent has a cap, ...