Quote:
Originally Posted by MinPhase
I wouldn't put a gate valve on the overflow simply because the flow is only controlled by the rate of return, if you restricted outflow from the display using a gate valve your tank would simply overflow. The only time you restrict flow is on the output side of a pump.
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With both the Herbie and the Bean you put a valve to induce a full siphon, with a secondary drain handling the overflow. Much Much Much quieter than a durso, and much safer