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Cal Ponc 09-30-2008 05:24 PM

septic lift station
 
I was wondering how far a lift station can push sewage?

micromind 09-30-2008 10:20 PM

I've installed commercial/industrial ones that were quite a few miles from anything. There's really no limit.

It depends on what you're trying to accomplish. Are you pumping raw sewage uphill to a septic tank? Effluent uphill to a drainfield? Raw sewage into a force main (pressurized main)?

Generally speaking, pumps like this are not rated in PSI, but feet of head. 2.31 feet of head = 1 PSI.

Figuring the pump capacity can be a somewhat complex equation, for a small system some of the factors can be estimated.

If you can give us a bit more info, we can help you choose a system that'll work well.

Rob

esc10 10-02-2008 12:01 PM

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Cal Ponc 10-02-2008 08:06 PM

lift station
 
i have a detached garage with a mother and law apt above. the existing septic tank is is about 50 ft away through an existing drain field. is a lift station a viable option or is a new septic system a better way to go? Just a note, i live in northern minnesota where it gets about -30 in the winter. i dont know if that matters or not. thanks for all your help.

Sean

micromind 10-02-2008 09:58 PM

Is the inlet of the septic tank above the floor of the garage? Different localities have different minimum bury depths for water and drain lines, it's usually best to call the local building department.

The proper grade for a drain line is between 1/8" and 1/4" per foot. For a 50' line, the end at the septic tank would need to be between 6-1/4" and 12-1/2" lower than the end at the building. If you can get that, you don't need a lift station at all.

Rob

Cal Ponc 10-06-2008 12:59 PM

lift station...
 
Quote:

Originally Posted by micromind (Post 167780)
Is the inlet of the septic tank above the floor of the garage? Different localities have different minimum bury depths for water and drain lines, it's usually best to call the local building department.

The proper grade for a drain line is between 1/8" and 1/4" per foot. For a 50' line, the end at the septic tank would need to be between 6-1/4" and 12-1/2" lower than the end at the building. If you can get that, you don't need a lift station at all.

Rob


I am lower than the existing tank. the cold is a issue. the recommend frost level is 5' below grade. so anything around that depth is no good. the lift station or new tank will have to start under the garage floor. thanks for all the help

Cal Ponc 10-07-2008 01:45 PM

more info for you...
 
The garage slab is about 4' to 5' below the inlet of the septic tank and 50' away. So i think the lift station will work but how deep below grade is a typical lift station and should i worry about freezing??

Sean


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