F
fishhugger
Guest
I built a pvc overflow pretty matching this design. http://www.youtube.com/watch?v=kjSLPVoLIs4
The differences: I used 1/2" pvc, the the 3 tubes that are about the same size, are about 10" in length on mine, the longer tube outside of the tank is only about 1-2" above the two elbows that sit above the tank, and any place where two elbows meet on mine are only connected by about a 1" PVC segment, so the elbows touch.
My problem is that when I tested it out in the same manner shown in the video. my flow is really really low. The only thing I can guess, is that because I drilled the hole for the check valve in the center of the two elbows exactly without gluing it together first is causing enough air to get in to lose the flow rate, but not enough to break the siphon. I know its not airtight now, but its fairly close, I just didnt expect it to suck that much in a test run.
I read you can expect around 600gph on a 1" tube and I need around 250ish, is that reasonable for a 1/2" overflow?
The differences: I used 1/2" pvc, the the 3 tubes that are about the same size, are about 10" in length on mine, the longer tube outside of the tank is only about 1-2" above the two elbows that sit above the tank, and any place where two elbows meet on mine are only connected by about a 1" PVC segment, so the elbows touch.
My problem is that when I tested it out in the same manner shown in the video. my flow is really really low. The only thing I can guess, is that because I drilled the hole for the check valve in the center of the two elbows exactly without gluing it together first is causing enough air to get in to lose the flow rate, but not enough to break the siphon. I know its not airtight now, but its fairly close, I just didnt expect it to suck that much in a test run.
I read you can expect around 600gph on a 1" tube and I need around 250ish, is that reasonable for a 1/2" overflow?