The Planted Tank Forum - View Single Post - Are all check valves created equal, low air pressure problem
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Old 12-08-2012, 11:18 PM   #4
GeToChKn
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Try it without a checkvalve and see if you get better pressure.

If you put your airpump above the tank, it won't usually drain water out as the water won't travel upwards. To be honest, I've never used a check valve. lol.
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