2
votes
1answer
255 views

What is the maximum number of connections to pipes?

Does anyone have a table of the maximum number of connections that drain/vent pipes can have for a given size?
1
vote
1answer
1k views

How do I find out if Air Admittance Valves (AAVs) are allowed in my municipality? [closed]

I saw Richard Trethewey of Ask This Old House install an AAV as part of a kitchen island sink system. I thought I might be able to use one for the water line for my washing machine. I'd like to ...