Hello everybody, today I was able to finally set up my diy pvc
overflow. It is working okay but...I think I have a problem.
Now, I do not have a check valve on the PVC
pipe because I thought after initially starting the siphon...I would never have to do it again if everything was working properly. My problem is that when I turn off the return pump to simulate a power outage, the return outlet begins siphoning water from the display tank back to my sump. Normally this would not be a problem because I have space for the excess water in my sump however, when I turn my pump back on the overflow pipes do not re-establish siphon like they should. Can somebody help me please? Thank you