07:21AM | 04/01/07
Member Since: 03/31/07
2 lifetime posts
Do vent pipes always need to work there way up vertically?

I am adding a new bathroom in my basement and the vent for the shower will run up, then run parallel between two ceiling joists. When i reach the wall i will have to 90 down and then 90 back parallel along the adjacent wall. Will this affect my venting when i 90 down?


10:21AM | 04/01/07
Member Since: 01/24/06
1626 lifetime posts
Me office1
Vents pitch AWAY from the fixtures being served so any condensation will flow back to the drain line being vented.

A vent can run horizontal

BUT if you jump down some codes to ask for a drip leg to remove the condensation that will build up over a period of time.

Depending on fixture units and developed length you possibly cause use an 11/2 pipe and in many cases will allow a much smaller box in effect rather then jumping down


11:01AM | 04/01/07
Member Since: 03/31/07
2 lifetime posts
what do you mean by a 11/2 pipe?
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