[hopetoretire]

I know sewage ejectors typically lift waste to a higher lever and empty into a normal gravity flow waste line to sewer or septic. Without the ability to gravity feed any of the system due to shallow sewer, will a normal ejector pump work to pump the waste through a virtually flat waste pipe - some 150 ft? If so, should the entire run be equal to pump outlet (2")? Any suggestions are welcome. Thanks in advance.

[massplumber2008]

Hi HTR...

At a length like that, ideally, the sewer pipe needs to be pitched at 1/4" per foot of piping. You might even be able to get away with an 1/8" per foot of piping, but at anything less than 1/8" pitch per foot of piping you can be pretty sure that solids will collect over time and the drain line will plug up and need to be cleared on a regular basis.

I would pipe it up at a minimum of 3" piping. I would also install a cleanout every 75 feet.

Care to discuss more? If so, post your thoughts and when I pop in next I'll respond.

Mark

[hopetoretire]

Thanks Mass, Slope is the problem - renovating an old garment factory building on an island without plmg code enforcement. Factory waste flows to an underground tank (no discharge or leach line)- requires pump truck weekly at some cost. Sewer line now exists at front of building but is about 2 ft deep. May be able to squeeze 1/8th"/ft out of it by discharging pump as shallow as possible. Appreciate your answer - it tells me that the head pressure from ejector pump will not sustain enough pressure to push solids that distance. Seems logical - when pump shuts off, flow would end and liquids would likely mostly flow, leaving solids. Thanks again.

[massplumber2008]

Have a great day!

[hopetoretire]

See "answer" above - first timer - didn't see 'comment' button - thanks again!

[massplumber2008]

Got you! I appreciate it!