How to Replace a Home Grinder Pump

A septic tank system in a house will always have several pumps, including a grinder pump. This pump grinds all the waste generated in the home and crushes it into smaller pieces, which can be decomposed by the bacteria present in the septic tank or before discharging the waste water to a public utility sewer system. The waste water in the septic tanks is percolated into the ground by periodical pumping.

The septic tank system is equipped with an alarm that alerts about any failure in the drainage system, like blockage or insufficient flow of waste water. The alarm will also sound when a pump fails and the flow of water is disturbed. If any of the pumps break down, the septic tank system is not functional. The pump should be replaced without any delay to prohibit overflow or drainage problems. Here are the steps to replace a grinder pump.

Material and Tools

  • New grinder pump
  • Screwdriver
  • Wire twister
  • Adjustable wrench

Step 1- Identify the Problem

Check to see if the drain pipe and the pump are functioning. When the waste pieces in line are not getting crushed into smaller pieces, the drainage field will get blocked. This will clog up sewage in the basement of the house. Consequently, the toilets also get choked, or there is a very slow drainage. In such a situation the grinder pump must be replaced.

Step 2 - Buying a New Pump

Check the specs of the present grinder pump, as you have to buy a replacement pump with the same size and capacity so that it can be easily installed in place of the broken pump. Generally, the grinder pumps are placed in the basement and are attached to the drain pipe that flows waste water into the septic tank system. The septic tank system has other pumps as well, so make sure to purchase the grinder pump. It comprises of an internal grinding wheel that breaks up the waste passing through it.

Step 3 - Removing the Bad Pump

Switch off the electrical lines to the pump from the supply panel. Remove all electrical wiring connected to the broken pump. These electrical connections need to be removed to take out the broken pump and install a new pump. Note what is attached and where. Turn off the water supply line to avoid fresh waste water coming through it. Remove the pipe connections to the pump at its inlet and outlet. Lift out the broken pump from the sump pit.

Step 4- Installing the New Pump

The new pump will need to be connected to the electrical system. You can use the same wires to connect the new pump that were used to connect   the defective pump. Follow the reverse procedure to install the new pump. Follow the instructions provided with the pump by the manufacturer.  Make all water and electrical connections to the pump. Switch on the power supply from panel. Check that the alarm system is in order. Turn on the water supply. Once you have installed the new pump, the septic tank system will become operational.