Quote:
Originally Posted by sbeason
1" drain and you can run 1" from your return pump until you get to the bottom of the overflow and reduce it to 3/4". Also put a ball valve on the outlet(return side) of your pump to control the water flow so you don't have too much noise like a flushing toilet.
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FYI, do NOT use a ball valve, use a gate valve. After a couple years that ball valve will seize up and be useless.