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This article explains the differences between and gives installation and maintenance advice for Sump Pumps, Sewage Ejector Pumps, Septic Grinder Pumps, Sewage Pumping Stations, & Septic Pump Alarms. Citation of this article by reference to this website and brief quotation for the sole purpose of review are permitted. Use of this information at other websites, in books or pamphlets for sale is reserved to the author. Technical review by industry experts has been performed and is ongoing - reviewers welcomed and are listed at "References." This document is a chapter of Inspecting, Testing, & Maintaining Residential Septic Systems an online book on septic systems. Sketches are from the Environment One Low Pressure Sewer Systems Grinder Pump catalog. © Copyright 2008 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use the links at page left to navigate this document or to go to Other Website Topics. Green links at left show where you are in our document & website. Guide to Sewage Grinder Pump Installation Details The pump shown at the top of this page is a sewage grinder pump which grinds the waste and pumps the solid/liquid measure to the building main drain. At left the sewage grinder pump parts include:
(Sketch is from the Environment One Low Pressure Sewer Systems Grinder Pump catalog.) Sewage or Septic Grinder pumps grind the solid waste entering the system, then pump it to the building drain. The building sewer drain then carries this mixture by gravity (a gravity main system) or by pump pressure (a forced main) to its destination at a septic tank and drainfield system or to a municipal sewer. Septic grinders are intended for use at residential or small commercial locations. Because the waste is ground and pumped under pressure, these pumps can lift high distances, say from a basement floor even to a street sewer which may be uphill from the home, or to a high pressure sewer main that may be located some distance away. For example, we inspected a summer camp community which used this force-main sewer system to move waste from buildings across a site covering several acres to a common septic system. Small sewage ejectors are for homes and commercial applications where toilet usage and wastewater loads are modest. A typical home sewage grinder pump uses a 1/3 to two horsepower electric motor which powers a grinder mechanism that grinds the waste, and an actual sewage waste pump which moves the ground sewage/wastewater mixture up a riser pipe to its destination: the building main sewer drain, where the wastewater is carried to a septic tank or to a community sewer line. Guide to Non-Clogging Sewer PumpsNon-clogging sewer pumps, or "non-clogs", are similar in principle to the grinder pumps discussed above, but they have more capacity, and can move solids up to 4" in diameter to a sewer main or waste handling system. Non-clogging pumps are used in some residential installations but more often in commercial or community systems or at Septic Pumping Stations. Our Septic Pump Inspection & Maintenance guide has additional important details that you should review if you are installing a septic pump or grinder pump. Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. SEPTIC PUMPS |
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05/02/2008 - 10/30/2006 www.inspect-ny.com/septic/Septic_Pump_Installation.htm © Copyright 2008 Daniel Friedman - all rights reserved
The sewage grinder pump is housed in a plastic or steel reservoir which receives waste from the bathroom or other plumbing fixtures it serves. When a float inside the reservoir indicates that the sewage level has reached a high level in the reservoir, the float turns on the grinder pump which grinds and pumps away the waste. 
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