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Old 11-29-2003, 08:18 AM   #1
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Power Sump ?

I've been toying with thought of doing a sump for my 75g. Problem is here in the Northeast we see frequent power outages. I'm concerned however about syphons continuing with no power to return H2O to the main tank or if there is a way to stop them if they would restart when the power came back on. So I was wondering about either some type of "pump in/pump out" system where if the power went out water flow in both directions would stop and when it came back on flow would be restored in both directions.

Any thoughts would be appreciated.


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Old 11-29-2003, 08:50 AM   #2
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The ods of getting a pump in/out system balanced is very low IMO. What you will end up with is one pump doing more work than the other in the long run and either a sump that is slowly being filled faster than it can return or a sump that is slowly being drained faster than it can be filled.

A U tube overflow will NOT lose syphon in a power outage and the only thing to be concerned over is that the sump can hold the back syphon from your sump return tubes. Putting a syphon break just below the water surface of the return tubes (plumbing from sump to tank) will break that syphon when air gets in the holes. You dont need to be worrieda bout that syphon because when power is restored the pump will pump water back into the tank.

You can get a large APC UPS and plug into your main sump pump. That will keep it running during breif power outages. The duration it will keep the pump up will depend on the pumps electrical load and the UPS's reserve capacity.

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Old 11-29-2003, 10:55 AM   #3
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if the concern is that great, plumb a stand-pipe overflow into your sump, so if it should overflow, the water can be channeled out to a floor drain or outdoors, or just about anywhere but the floor.
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