Sewage grinder pumps collect all of the wastewater from the home, grind up solids, and send the wastewater to the sewer line or treatment system. They are commonly used gravity sewer systems, septic tank and other wastewater systems cannot be used or are too expensive.
The grinder pump is automatically activated and typically runs for very short periods several times per day. Electrical consumption of the grinder pump is low - a household that uses 250 gallons of water per day should use between 6 kwhr and 23 kwhr per month to run the pump. (Actual water and power usage will vary depending on the system pressure.)