The Sewer Battle: Gravity vs. Pressurized | Municipal ...
Aug 19, 2014· Lowpressure grinder pump systems require a pump station at each residence or business; waste flows through a 1 1/4inch lateral to a 2 to 6inch diameter main. Electrical costs for the pump stations are about 12 per year, typically paid by the consumer, although some municipalities choose to own and maintain the pumps.