Only One AAV in Master Bathroom (2 Sinks/1 Shower/1 Toilet)

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Johndoejohndoes

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I have one plumbing vent coming out of my roof by the laundry room which ties into the drain going out to the sewer. Everything else connects underground to that drain going out to the sewer…but I notice in every bathroom (under every sink) there is an AAV.

In the master bathroom, I have two sinks and they only did one AAV under one sink.

Sink 1 - No AAV

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Sink 2 - AAV

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Here’s a before and after (Shower, Sink 1, Sink 2, Toilet) showing how it’s all tied into the main pipe going out to the sewer. Does there need to be another AAV on the other sink? Is it okay that there’s only one AAV on Sink 2?

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IMG_9070.jpeg


Any advice would be appreciated as I want to make sure my setup is correct.
 

Jeff H Young

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Needs a vent where Im from. but you can get by with an AAV youve got neither from what I see unless they did something inside the wall
 

wwhitney

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To amplify Jeff's comment, every trap needs a vent connection before its drain turns downward. The last picture in the OP shows the sink drains turn downward immediately inside the wall. So both sinks needs an AAV outside the wall.

Cheers, Wayne
 
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Tuttles Revenge

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x3 that both sinks are required to have at least an AAV.

Since the bathroom is horizontal wet vented the AAV is the vent for that entire bathroom group and should be sized for the number of Drainage Fixture Units combined. It probably is, but should be verified.

Technically both of those elbows should also be long sweeps as well. Transitioning from Vertical to Horizontal and Horizontal to Horizontal require the use of long sweeps.
 

Jeff H Young

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Im trying to overlook things , not great work definately needs the aav but other wise mostly cosmeticaly unappealing plus disregard on those sweeps shouldnt really have issues once the vent is fixed
 
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