full siphon flow rate for 1 inch cpvc

That will be very noisy

About 900 very noisy gallons per hour with a continuous syphon


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900gph would be very noisy with a traditional durso standpipe.

With a full siphon it should be nearly silent. I run 700 or so through my 1" siphon with my gate valve more than half closed.

I run a bean animal style system of my own with some minor changes, but it's basically the same

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i run a fluvial sp6 (3400gph) pump on my 150 gal w/ 55 gal sump...i run 2 full siphon 1" drains and 2 emergency 1'' drains. My full siphon drains are about 30% closed with gate valve and my set up is completely silent.

I was concerned that my drains (tank is drilled to accept 1" bulkheads) would be a limitation. Then I read that using larger plumbing around the bulkhead would increase flow, so I have 1.5" drain plumbing that narrows to the 1" bulkhead then back to 1.5" plumbing into my filter socks.

Now I don't have anything to compare it to nor do I have actual flow rate data, but I can say with certainty that my 2 main drains are flowing way more than the 600 gph each that is the common max gravitational flow prescribed by most sources for 1" drains.

Full siphon is silent, but you just need to make sure the water level in your sump is just higher than where your drains end.

full siphon with gate valves is great for complete silence