01-13-2009, 04:11 PM
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Originally Posted by onefish2fish
you could have mirco bubbles in your display that you cant see, eventually they are collecting in the upper part of the U in the U-tube. This is a problem because if that fills completely up with air your siphon will break and the return pump down in the sump will still be pumping, causing a flood.
An overflow rated for a higher GPH (gallons per hour) will drain more water to the sump. A pump rated for less GPH will return less to the display. You want to try to match flows as closely as possible (taking account head loss on the return pump) and a way to make it easier is to T off areas and add ball valves
I did add a ball valve. Where could I put a T in the line? Before or after the ball valve? Does a T exist that has a ball valve in it?