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# WATER PRESSURE for SUMP DISCHARGE

## WATER PRESSURE for SUMP DISCHARGE

(OP)
We have a sump pump on our shared well so municipal water pressure is not available. There are times the power fails and without a battery back-up flooding will occur.
My thoughts turned to finding an additional way of getting the water outside.

Although it seems too simple, why could you not enclosed and fully seal the sump pit where the house perimeter ground water is filling the sump.The enclosure would then have an opening in the top centre to allow an ABS or PVC 1-1/2 diameter pipe to be sealed to the top with the pipe extending approximately 6'(72") to discharge the water to the outside sump drain.

The perimeter house drains collecting water would exert pressure as they fully fill up and attempt to keep flowing to the sump. As the water flows into the sump and not pumped out, the water would increase in pressure and begin to rise within the sealed enclosure and up the 1-1/2" pipe, taking the route of least resistance.
The atmospheric pressure of 14.7 psi acting on the 1-1/2'pipe water surface plus the weight of the water within the pipe at a 60" level would be the cumulative pressure necessary to overcome by the drain water running into the sump and building pressure from resulting through ground water flow etc.
All drain outlets in the 6" concrete floor would be sealed preventing other water escape.

How do you calculate atmospheric pressure and ground water pressure in these 6 ft. deep, 4" dia. perforated, corrugated, drain pipes?
What am I not seeing or calculating that negates this theory?
Thanks.

### RE: WATER PRESSURE for SUMP DISCHARGE

You think you can seal the floor drains, but you really can't.

Mike Halloran
Pembroke Pines, FL, USA

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