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Old 08-11-2014, 08:50 PM   #1
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Durso issues

M almost ready to give up on this...lol. One of my durst drains is silent, the other is like a loud bong. The quiet one feeds into about 7 feet of one inch pipe. It drops 6 niches then travels about 6 feet then elbows to a 2 foot drop. The noisy one drops straight from the bulkhead into the sump, about a 2 foot drop straight down. Why is one silent but the other gurgles like crazy? I've adjusted the air intake with no luck. I can't have the tank run this loud all the time....
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Old 08-11-2014, 08:55 PM   #2
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How far down into the sump is the pipe that comes down? Is it under water or dropping from a distance? Are you using a filter sock?
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Old 08-11-2014, 09:48 PM   #3
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I had it 2 inches below but then I cut it so it's 2 inches above the water line, no difference. The quiet one is still below.
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Old 08-11-2014, 10:01 PM   #4
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The straight one has no back pressure to 'back the water up' in the pipe. The one with all the bends does. You will have to put a gate valve (not a check valve / ball valve) on it. Once you close it off some you should be able to adjust your air line to make it nice and quiet.


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Old 08-11-2014, 10:23 PM   #5
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Wouldn't a valve make it so my return pump and the water returning to my sump don't match?
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Old 08-11-2014, 11:01 PM   #6
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You will have to tweak it, but no. Your tank will stabilize with the outflow matching the return glow. It will just be quieter. That is why the one with the bends is quieter.


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Old 08-12-2014, 04:07 PM   #7
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Cool ill give it a try...
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Old 08-12-2014, 05:46 PM   #8
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you can even try it out just by putting your thumb over the bottom of the drain a bit. Then get someone else to tweak the airline.
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Old 08-12-2014, 06:32 PM   #9
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Is it better to have the pipe under the water or over it?
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Old 08-12-2014, 08:27 PM   #10
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Mine are both underwater so I can't hear the water splashing into the sump.


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