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Old 04-14-2013, 09:33 PM   #16
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Sump Pump Gurgling


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I was under the impression that any drain required air to be admitted into the system or it would not function properly. This system is independent of the household plumbing and not connected to a stack or any other vent.

A friend who was a former plumber told me drains hate 90 degree bends and to either install 45's, use flex pipe, or extend the pipe and elbows to outside the house to eliminate the noise.
A sump discharge is not a drain. It is a pressurized discharge.

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Old 04-15-2013, 12:52 AM   #17
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Your horizontal checks are doing nothing because after each one you have an elbow going down. Water would rather go forward & down than backward against more water. As everyone said you should remove those two as well as the AAV. This is not a DWV application so AAV's need not apply.

Are you in the basement when you hear these sounds or on the first floor?
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Old 04-15-2013, 09:06 AM   #18
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The sounds are very obvious from the entire first floor (it's only a 1 story house).

So say I remove the 2 horizontal check valves and the AAV. I'm back to square one and there's still a ton of noise. The system is apparently too long to function as a pressurized drain because the water coming out in the front yard is not pressurized, just gravity draining. Would a bigger pipe diameter once it exits the house solve the problem?
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Old 04-15-2013, 10:35 AM   #19
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The sounds are very obvious from the entire first floor (it's only a 1 story house).

So say I remove the 2 horizontal check valves and the AAV. I'm back to square one and there's still a ton of noise. The system is apparently too long to function as a pressurized drain because the water coming out in the front yard is not pressurized, just gravity draining. Would a bigger pipe diameter once it exits the house solve the problem?
Bigger pipe won't fix the problem. Have you checked the check valves to see if they can be used in a horizontal application. Not all will work horizontally.
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Old 04-15-2013, 12:51 PM   #20
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I think we've reached a point where pictures are really going to help us help you solve your problem. Could you take a few pics - a close up of the pit/pump/check, a wider shot of the piping, a close up of the horizontal check in the basement, where it exits the basement, where it emerges outside, the outside check, and where it ends? Sounds like a lot to do but I truly think it will help us all.
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Old 04-15-2013, 03:38 PM   #21
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First picture is a flap-style check valve a couple feet above pit. Second is the length of pipe in the basement, about 20 feet long. Third is the 2 elbows where it exits the foundation. Fourth is a spring-style check valve on the line before the elbows. Fifth is the AAV on a riser so it doesn't get buried under snow, and another flap-style check valve just after it. And the last picture is where it drains in the front yard- approximately 80 feet away after another elbow.
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Old 04-15-2013, 05:55 PM   #22
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Perhaps you should pitch the nice pipe towards the outside of the house and remove the checks. Except for the one at the sump. It would also help if you got it out of your house quicker.
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Old 04-15-2013, 06:11 PM   #23
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I was thinking make sure the pipe inside the basement is sloped... go straight through the outside of the house, bend 45 degrees into the ground, and then connect another 45 to the pipe in the ground. Wouldn't look pretty but it might work.

That or do the 45s inside the basement
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Old 04-15-2013, 06:43 PM   #24
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If I understand your original problem, you want to eliminate the water noise when the pump starts. This is done by keeping the pipe full of water. If that is still true, you need to slope the pipe towards the pump so the water does not drain out from gravity. Or you could have the pipe turn up then go down at the end of the pipe before it goes out the wall. This would create a physical barrier to keep the water in the pipe.

Ignore the dots. The lines represent the pipe.
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Old 04-16-2013, 08:21 AM   #25
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I'd like to just eliminate the noise problems, which come about from the vacuum being created. I'm guessing because of the length of the pipe, the pump becomes ineffective at some point and gravity takes over.
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Old 04-16-2013, 08:38 AM   #26
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I wonder if placing a spring check valve at the very end of the line would help? I've never seen it done that way but it might ensure that your line stays full of water.
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Old 04-17-2013, 11:05 AM   #27
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Another thing I'm considering... if the piece of pipe that run between the elbow in the yard and the elbow in the basement was slightly off-level in the wrong direction, would that cause this?
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Old 04-17-2013, 06:42 PM   #28
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Another thing I'm considering... if the piece of pipe that run between the elbow in the yard and the elbow in the basement was slightly off-level in the wrong direction, would that cause this?
It wouldn't matter. If all of your check valves are working, no water should leak out of the pipes when the pump shuts off. If the pipes are full, then there will be no start up noise.
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Old 04-18-2013, 10:00 AM   #29
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My main concern is addressing the vacuum and air getting pulled back in, I have a feeling if this was gone then the start-up noise would be gone also. I think it's the trapped air making the noise.
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Old 04-18-2013, 10:48 AM   #30
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My main concern is addressing the vacuum and air getting pulled back in, I have a feeling if this was gone then the start-up noise would be gone also. I think it's the trapped air making the noise.
Points back to a check valve that is allowing water to leave the pipe.

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