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Old 07-06-2012, 02:32 AM   #1
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Pvc overflow on tank

Hay would slow a PVC overflow from having good flow. The piping is all clear it is 1/2 inch PVC and 5/8 tubing into the sump. Its working, but really only moving about 20-30 gph.

What is the secret with these things lol.
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Old 07-06-2012, 08:21 AM   #2
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Could be air in the top where it go's over the tank rim Mine slow when the one way valve leaks air. Also could be algae growing inside.
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Old 07-06-2012, 10:17 AM   #3
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1/2" PVC isn't very big, so its not going to flow a whole lot of water, if you want more flow, you may need to increase the size of your pipe. An air lock as mentioned could also slow down flow. Do you have have an air release?
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Old 07-06-2012, 12:53 PM   #4
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Thanks everyone. The over flow had great flow. But the pipe coming off the PVC tubing is clear hosing. It was on a reel in the store and seems to stay flat. I decided to change it out with better hosing and now that it is more open, the flow has slowed...
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Old 07-07-2012, 01:04 AM   #5
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Ok, I don't know what changed but it is working today.

Now is sounds SO loud. Like a toilet flushing.

When I cover the air hole on top, it stops. Can I permanently cover this hole?
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Old 07-07-2012, 11:30 AM   #6
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I put a cap with a hole in it to stop the noise from mine If you plug it it will create a siphon
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Old 07-07-2012, 12:31 PM   #7
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Quote:
Originally Posted by Grizz
I put a cap with a hole in it to stop the noise from mine If you plug it it will create a siphon
Yeah, I tried that. It's just as loud. Don't I want a Syphon, or does this defeat the purpose?
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Old 07-07-2012, 12:46 PM   #8
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You do and you dont lol when the water level drops below the tube intake it stops drawing when you raise the water level it will start to draw. With a siphon it will drain the water from the over flow and you'll need to draw the air out in order to get it working again. If the power go's and it dont start it may flood the DT Im running 2 1in over flows which is double my return in case ones fails
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Old 07-07-2012, 02:02 PM   #9
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Quote:
Originally Posted by Grizz
You do and you dont lol when the water level drops below the tube intake it stops drawing when you raise the water level it will start to draw. With a siphon it will drain the water from the over flow and you'll need to draw the air out in order to get it working again. If the power go's and it dont start it may flood the DT Im running 2 1in over flows which is double my return in case ones fails
Hmm this makes sense. I won't seal it then. By the way, that is an excellent idea you have there. I think I may follow suit if I can quite it a little.
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Old 07-07-2012, 06:05 PM   #10
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With 2 it may quite down as there wont be as much flow forced into the one
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