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SEPTIC SYSTEM INSPECT DIAGNOSE REPAIR
SEPTIC CARE INSTRUCTIONS
SEPTIC D-BOX INSTALL REPAIR
SEPTIC DRAINFIELD FAILURE DIAGNOSIS
SEPTIC DYE TEST PROCEDURE
SEPTIC FAILURE SIGNS
SEPTIC INSPECTION & TEST GUIDE
SEPTIC LIFE EXPECTANCY
SEPTIC SUPPLIES & PARTS
SEPTIC SYSTEM DESIGN ALTERNATIVES
SEPTIC SYSTEM DESIGN BASICS
SEPTIC SYSTEMS, HOME BUYERS GUIDE to
SEPTIC SYSTEM SAFETY WARNINGS
SEPTIC TREATMENTS & CHEMICALS
SEWAGE BACKUP PREVENTION
SEWAGE EJECTOR / GRINDER PUMPS
SEWER GAS ODORS
SEWER LINE REPLACEMENT
SINKHOLES, WARNING SIGNS
SOAKAWAY BED FAILURE DIAGNOSIS
SULPHUR & SEWER GAS SMELL SOURCES
TOILETS, INSPECT, INSTALL, REPAIR
TRAPS on PLUMBING FIXTURES
TREATMENTS & CHEMICALS, SEPTIC
VIDEO GUIDES: Septic Videos
WATER CONSERVATION MEASURES
WATER SOFTENERS & CONDITIONERS
WATER SUPPLY & DRAIN PIPING
WATER, WELLS, WATER TANKS: TESTING GUIDE
WASHING MACHINES & SEPTIC SYSTEMS
WASTEWATER TREATMENT BASICS
WINTERIZE A BUILDING
This article describes sewage ejector pumps and residential or light commercial-use sewage grinder pumps used to move wastewater from low areas to a septic tank or to a municipal sewer line. This septic pump or sewage pump article series will help you diagnose and fix problems with sewage pumps, perform normal sewage ejector pump maintenance, and when needed, select and buy a sewage pump. This article series also 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.
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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.
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.
Set the Sewage Ejector Pump Float Control Switch
Guide to Non-Clogging Sewer Pumps
Non-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.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.
Design Manuals for Septic Systems
Onsite Wastewater Disposal Books