Cubey
New Member
Every drain requires a vent... having one vent for all of them is called a wet vent and is likely not done legally in your situation.
Pretty sure that's not 100% true. My roof would be badly littered with vent pipes for 2 toilets, 2 showers, a bath tub, 3 bathroom sinks, kitchen sink plus washing machine drain. That's 10 vent pipes!! Imagine an apartment building. It's entire roof would be vent pipes. I haven't counted the air vents on my roof but I know it's maybe 5-6 total. Usually a bathroom gets one air vent for the entire bathroom except in the case of my master bathroom where the tub and toilet are on an opposite, far away wall from the sink and shower. I think it has two.
All of my drains work perfectly with no backing and no slow drains. And My house was totally remodeled/added on to (nearly rebuilt) in 1997. The original section of the house dates back to 1910. I doubt it even had plumbing or electricity when it was built here in Southern Arkansas in 1910. It has a modern breaker box, modern plumbing, everything. There's really nothing 1910 about it. Just pointing this out because this house must be up to 1997 plumbing code since that's when it was completely redone. And the way it's done, it shares vent pipes between more than one drain.
This is how a typical small bathroom gets plumbed:
My mother's house built around the 60's I'd guess has 3 vent pipes. One for the bathroom, one for the kitchen sink and one for the washing machine drain. She'd have 5 if we go by your logic.. one for every drain. (Toilet, tub, bathroom sink, kitchen sink, washer drain).
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