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Old 06-23-2015, 03:26 PM   #16
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Try it with aav off. If it drains, you found your problem. Bad aav or aav not high enough. Just a thought.
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Old 06-23-2015, 04:11 PM   #17
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The AAV is to let air in and not let the smell out correct? If I remove the AVV then the sinks should drain normally correct? I have tried it with the AVV on and off. It still drains slowly.

I asked earlier about putting a vent in between the 2 sinks in the white pipes. Would this fix my issue.
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Old 06-23-2015, 05:37 PM   #18
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Thats not an AAV thats a spring loaded cheater vent.

This is an AAV
http://www.amazon.com/Oatey-39018-Su.../dp/B000H5SLWM

From your description I would suggest you start filling your sink up with only hot water then let it go. Repeat until it opens up. Sounds like you have a grease blockage a snake will only pass through them. They usually will not clean them. Also Add Dawn in the water its a degreaser.

If that doesn't work then get your garden house remove the trap stick it into the trap opening and jam it in with rags. Let it rip.

Then after you get it open treat with Bioclean religiously and make sure house hold understands grease down that drain is a big no no.

http://www.walmart.com/ip/Biokleen-B...fl-oz/25357855

Last edited by Ghostmaker; 06-23-2015 at 05:44 PM.
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Old 06-23-2015, 11:54 PM   #19
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Quote:
Originally Posted by MrBryan View Post
I agree with your diagnosis that it sounds like a venting issue.
Both of you are wrong. Common misinformation often spread by word of mouth and very often on the internet. With all due respect please keep spreading this misinformation. I get alot of profitable work from clients who believe this nonsense.

Once again Ghostmaker nailed it. Very common kitchen sink grease/food particle clog in line. Snake will not remove that type of clog.
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Old 06-24-2015, 07:50 AM   #20
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Quote:
Originally Posted by SHR Plumber View Post
Both of you are wrong. Common misinformation often spread by word of mouth and very often on the internet. With all due respect please keep spreading this misinformation. I get alot of profitable work from clients who believe this nonsense.

Once again Ghostmaker nailed it. Very common kitchen sink grease/food particle clog in line. Snake will not remove that type of clog.
Perhaps but only one of us is actually there and that is the OP, so the best we can do to help the guy out is speculate based on what we know.

Still doesn't explain why the sink drains OK when both sides are empty, and only drains slow when one side is full. Wouldn't a clog (grease or otherwise) cause it to drain slow regardless? Not trying to challenge you, I am not a professional or a plumber, just trying to make the best sense out of the info given by the OP.
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Old 06-24-2015, 05:38 PM   #21
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You can keep beating a dead horse or do what I suggest. Your symptoms point to a slow drain.

"I have a double kitchen sink that is draining slowly. I have checked the drain lines and I have replaced the vent under the sink and I have snaked the vent pipes on the roof.

The reason I believe it is a venting problem is because when both sinks are empty the water drains fine. When I fill one of them up to wash dishes the water starts to back up in the other. I have even removed the vent valve while the water was draining and it did not help."

When both sinks are empty your adding water through the faucet if the drain is faster then water added it will drain just fine.

When you drain a full sink you are exceeding the drainage of the partially clogged drain. The water can't go down the drain so it now seeks it's own level and fills opposite sink.. Water does that naturally.

This is a kitchen sink grease is drained through a kitchen sink. Grease usually will require a larger 1/2 rod snake on a 1.5 inch drain to get it open. Most likely a jet will open it much better. You blow the grease into larger pipes. Even If I open your kitchen sink with this big rod I would never warrant that it will drain unless you used bioclean.

Grease hates real hot water you have a slow drain. Dawn liquid detergent also dissolves grease So hot water and dawn on a slow drain sink might work it might not.

The hose might build enough force to push the blockage to larger pipe but it's messy.

Bioclean will after a month of treatment will eat all the stuff. So if you have the patience you can use it.

Your Mechanical cheap vent needs replaces with an AAV They are the only plumbing approved thing to use.

P.S. As soon as you said you removed that cheap spring vent nothing changed all that is left is the drain. I have over 28 years as a plumber in new work and repair and commercial work. I currently inspect others work for the government.

Last edited by Ghostmaker; 06-24-2015 at 05:43 PM.
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Old 06-30-2015, 04:55 AM   #22
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Quote:
Originally Posted by MrBryan View Post
only one of us is actually there and that is the OP, so the best we can do to help the guy out is speculate based on what we know.
Yep. Done it.

Compared to Ghostmaker I am a pup with only 24 years of service plumbing experience. I am sure the OP and MrBryan are on the right track though. 'cause we don't know nothin'.
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