TheGooseWhisperer Posted May 10, 2011 Share Posted May 10, 2011 Admittedly I have done almost no looking into this on my own, but... I have a ball valve on my return pump (~700 ghp at zero head, not sure about the 4 feet at tank top) and if i get it more than about 1/3 open the siphon style overflow box (CPR, rated for 600gph) starts flushing. is there anything i can do to get more flow out of the return? Drain line is 1" PVC with a flexible washing machine drain line attached to it. It has a ball valve too, but is wide open atm. Thanks Link to comment Share on other sites More sharing options...
lurch Posted May 10, 2011 Share Posted May 10, 2011 Is the end under water? Link to comment Share on other sites More sharing options...
TheGooseWhisperer Posted May 10, 2011 Author Share Posted May 10, 2011 Yep, the end is at the bottom of the sump. I wanted to cut down on noise since it is in the living room where we spend most of our time. I forgot to mention that there is a rigid tubing vent on the cover to the drain line. Link to comment Share on other sites More sharing options...
lurch Posted May 11, 2011 Share Posted May 11, 2011 My drain is pvc and when the end was under water it made the flushing sound. So I guessed it was because of the water pressure on the end of the tube. I drilled a bunch of holes in the part that was under water and that stopped the flushing noise. Link to comment Share on other sites More sharing options...
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