Adding AAV ?

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lennyk

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Hello,

I have a situation with no venting, shower and sink connected to same waste line.

The shower drains slowly due to no venting and air lock caused by sink trap.

Would adding a Studor AAV(green) in location on drawing help ?

Thanks,

L

dia.jpg
 

Reach4

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huge3.png How about this? There would be a minimum and maximum on drain pipe 1.
There is probably some minimum on drain pipe 2.
You want a sanitary tee, I think at 3.
 

Terry

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There should also be a p-trap on the shower.

The AAV goes above the trap arm, not below. The trap arm is the horizontal portion downhill of the p-trap.
Adding the AAV as shown in the second picture should also vent the shower p-trap.
 

hj

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if the system is "air bound" an AAV will be completely useless to cure it. AND, if it is air bound, you have a more serious problem somewhere which is causing it to be air bound.
 

Terry

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hj's point, is that even with systems that can use an AAV, there needs to be at least on vent through the roof that allows the system to breathe.
There will be positive and negative air pressure, and the vent allows that. An AAV only allows intake.
 

lennyk

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As suspected, the line was clogged further down, snaked and all is well now.

Aav was still put in there is a kitchen drain further down the line and no vent until after there.
Line is also under sized at 1.5" which i am unable to do anything about.
 
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