Originally Posted by MaineSalt
I tried using a ball valve on the return line and my pump was over heating. Guess I could have gone and bought a different pump with less power but its a two hour drive so instead I made a bigger overflow with a ball valve in it and I only have to close the valve a tiny bit and the over flow and return pump are almost perfect. But I still couldn't match them perfect so I made my pump slightly faster then my overflow and rigged up a float on the pump so when the last chamber gets low the pump shuts off for a few seconds and the chamber refills. My pump only shuts off for a few seconds every 20 minutes or so. It's a new DIY setup that's been running for three days and so far so good.
That sounds like a disaster waiting to happen!
BTW, how do you know the pump was overheating? Choking a pump back is good for it and it will actually use less electricity. I don't see how it would run hot this way.