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 Oatey sure vent problem
Author: waukeshaplumbing (WI)

house is 1900's farm house
kitchen sink never had a vent
on slab
i did a kitchen remodel and Oatey Sure Vented it
its been 6 months

Got a call back that the dishwasher is leaking out of the air gap.
sent the customer to my drain cleaning friend
He found some minor grease, but nothing major...all clean
He notices an issue with the AAV...sink still drains slow, remove the AAV and it drains well.

I go there and sure enough the Surevent isnt letting air in..when i remove it you hear a sucking noise and the drain goes right down.

in install a 2nd one, 3rd one....no change...I go pick up a Studor brand vent....works 50% better...still not right....customer is happy...no more overflows....im not happy though...

nothing is unusual about how the drain piping under the sink is run..same way ive done it forever...

with the sure vent it would backup into the sink right away from the start...just like nothing is going down the drain...

called my service/repair friend...no idea's whats happening...

Anyone had this issue? i probably install 20 Surevents a year...1st problem.

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 Re: Oatey sure vent problem
Author: dlh (TX)

dont know, never used anything other than the studor brand although i have had problems like this with them and just ran a vtr to correct

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 Re: Oatey sure vent problem
Author: LemonPlumber (FL)

I would bet your friend did not clear the drain .Sorry but if it worked to start with they may have some type of build up on the top side of the drain that is restricting air flow.Is the auto vent as high in the space as it can be?This will help it open when air lock starts.Great place to slide the see snake micro to find out what is happing down stream of the 90.Rubber band asanwich bag over the female of the aav and drain the sink.if it inflates you have a down stream restriction.aav's hate foam too.



Edited 1 times.

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 Re: Oatey sure vent problem
Author: joe plumber (NE)

Most aav's have a minimum height requirement above the trap in order for them to operate properly. I only use them as a last resort.The higher you can install one under the cabinet ,the better it will function.



Edited 1 times.

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 Re: Oatey sure vent problem
Author: GREENplumb (GA)

Snake the Line, Check the dishwasher drain-line, check the Auto-vent.

Waulk, this has nothing to do with AAVs, what kind of Basket Strainers do you use?

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 Re: Oatey sure vent problem
Author: redwood (CT)

You need to find a friend who is better at cleaning drains. It's still clogged!

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 Re: Oatey sure vent problem
Author: waukeshaplumbing (WI)

i remove the AAV and the drain works perfect..

the basket strainers are Allen...use them every day
AAV is 8"+ above the traps

originally the dishwasher would backup into the sink 1 second after starting to drain...it never even made it into the old drain under the slab...

this problem has been happening for 6 months she said....she couldnt figure out where the water was coming from on the counter top..then one day she saw it happening....

i am just glad the 'Studor' brand made a difference...i didnt know what i was going to do....open up her brand new kitchen and 2nd floor walls and run a vent?....

Still no changes to the Studor vent code in WI..

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 Re: Oatey sure vent problem
Author: GREENplumb (GA)

why dont you use Kohler basket strains

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 Re: Oatey sure vent problem
Author: waukeshaplumbing (WI)

$$$$$$$$$$$$$$$$$$$$$$$$$$$

i am a mid priced plumber who looks for VALUE....$50 for a basket strainer is a High End product...not a good Value.

I dont like the Allen ones either...too cheap...once the case is done im back to the brand i used to use...

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 Re: Oatey sure vent problem
Author: GREENplumb (GA)

Ive been useing Kohler Basket Strainers, ya the $40 ones, I put a regular basket strain in one of there hands and a Kohler Basket strain in the other, it sells itself.

I am still lookin for a better one

Post Reply

 Re: Oatey sure vent problem
Author: redwood (CT)

"i remove the AAV and the drain works perfect.."

Yup! And If it wasn't still clogged you wouldn't have to remove the AAV to get it to drain... :think2:

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 Re: Oatey sure vent problem
Author: hj (AZ)

Are you sure it is not venting OUT at first? Once it evacuates the air, and drainage starts, then it will drain while drawing air in.



Edited 1 times.

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 Re: Oatey sure vent problem
Author: waukeshaplumbing (WI)

yes i figure it IS starting out with Pos. pressure and thats whats jamming it up.

found out drain cleaner sent his partner to this one...so there could be an issue there...if i get a call back again im going to insist the main guy i use for drain cleaning goes there...

doesnt the fact that it works find w/o the Studor vent screwed in mean its NOT the drain?

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 Re: Oatey sure vent problem
Author: SwimRunPlumb (MI)

doesnt the fact that it works find w/o the Studor vent screwed in mean its NOT the drain?

No. It means it is exactly the drain because it is having a hard time relieving the initial positive pressure. When you take off the AAV, it is able to free the positive pressure which should be going down the drain but is unable to.

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 Re: Oatey sure vent problem
Author: hj (AZ)

NO, it just means that the line is holding water somewhere creating an air block. Once that is eliminated, by removing the AAV, then it drains normally, just as it would if the vent went out the roof. The poor drainage is a symptom, caused by the AAV, of a different problem.

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