Evacuation Pump Air Vent


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Old 04-07-08, 07:15 PM
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Evacuation Pump Air Vent

I have an evacuation holding tank for a basement utility sink. It evacuates to a washing machine drain pipe mounted to the wall 2 feet above the floor. The holding tank sits on the floor, has a air vent pipe that puts the air vent check valve (skeeter valve?) above the WM drain pipe. Recently had to push the tank air vent pipe lower and then the utility sink started to drain slowly. Now the water will not drain as fast . I can remove the tank air vent and the sink will drain correctly. I have tried a new check valve, and placing the vent pipe at different hights, but I cannot correct the problem. It is obvious that as the sink drains, it has resistance because the water cannot displace the air efficiently. Any ideas?
 
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Old 04-13-08, 09:59 AM
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They are called "cheater vents" or Studor Vents.

http://www.studor.net/

has all the info you need about the AAV.

When you say you had to push the vent lower, are you pushing it into the tank? The vent pipe should be flush with the bottom of the top of the tank. It should not go into the liquid level at all.

Good luck with your project.
 
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Old 04-14-08, 05:41 PM
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Thank you

I will give this a try this week end. Thank you very much for the advice
 
 

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