yogurt I am not getting what you a talking about 
I am using (2) 1" overflows which according to everything you will read here and other similar sites say should drain 600 gph each. Or twelve hundred gph.
I get ~1900 gph outta them. I bucket tested and got 33 gallons flow in just over 1 minute. I send ~1800 gph to the DT and bypass ~200 gph thru the fuge. On a AGA 210 G RR tank.
I balanced the drains so almost no air is ingested and get full flow thru them. Like putting a muzzle onna dog it quiets them right down to near silence. Mebbe I should say I am using 1-1/2" PVC and 90° sweeps with no elbows until right above the sump.
If I was able to oversize the overflows I would up the pump ... rinse and repeat ... until I got the flowrate and turnover I look for.
Thing is to back down a bit before full capacity. I do adjust the valves mebbe every 8 months or so but only for piece of mind as they have not changed in five years now that I have been operating this way.
I am using (2) 1" overflows which according to everything you will read here and other similar sites say should drain 600 gph each. Or twelve hundred gph.
I get ~1900 gph outta them. I bucket tested and got 33 gallons flow in just over 1 minute. I send ~1800 gph to the DT and bypass ~200 gph thru the fuge. On a AGA 210 G RR tank.
I balanced the drains so almost no air is ingested and get full flow thru them. Like putting a muzzle onna dog it quiets them right down to near silence. Mebbe I should say I am using 1-1/2" PVC and 90° sweeps with no elbows until right above the sump.
If I was able to oversize the overflows I would up the pump ... rinse and repeat ... until I got the flowrate and turnover I look for.
Thing is to back down a bit before full capacity. I do adjust the valves mebbe every 8 months or so but only for piece of mind as they have not changed in five years now that I have been operating this way.