How To Replace a Sump Pump in 5 Steps

The first step in removing your old sump pump is disconnecting the power, which means turning off power from the circuit breaker and unplugging the unit. This is when you may need a good flashlight or work light. Then, disconnect the sump pump from the discharge line. Disconnect the bottom pipe from the check valve and separate.

To avoid getting water all over the floor, the next step involves removing the sump pump lid, removing the check valve, and draining any remaining water into the open sump pump pit. You should now be able to remove the sump pump.

Before starting the replacement, read through the user manual to get familiar with your new sump pump. The manual not only comes with model-specific instructions but also provides important safety and accessory compatibility information.

Once you’ve removed the old unit, it’s time to center and align your new sump pump. Depending on your home’s configuration, that means placing it in the sump pump pit or on top of a pump stand. Use the level to make sure the pump is on level ground. If needed, you can use spacers or shims to level it, allowing the float to move freely in the center of the pit without touching the sides. 

Find the discharge outlet on the new sump pump. If your old discharge pipe is a match to your new sump pump, you don’t need a new pipe. If you need a new pipe, you can cut a piece of PVC to the required length.

To connect the discharge line, attach a length of PVC pipe to the pump using a male adapter. Most discharge pipes either screw onto a threaded connection or need to be glued on with PVC cement. Once you’ve attached and fastened the discharge pipe, ensure that the arrow on the pipe is pointing up—this indicates that the water flows up and out of the pit. 

With the sump pump and pipes properly assembled, you’re ready to plug the unit in. Turn the power back on at the circuit breaker, then plug the cord into the outlet. To protect you from electrical shocks, this outlet should be a ground fault circuit interrupter.

You’re not finished yet—it’s important to test your new sump pump to ensure it’s working properly. Fill the pit with water, which should cause the float to rise and activate the sump pump. The sump pump should begin processing the water and turn off as soon as the water level drops below the float. If the sump pump isn't draining water, turn off the power at the source again before troubleshooting.

Although not technically required, it’s recommended to cover your sump pump once it’s working. Sump pumps usually come with tight-fitting covers that reduce noise and smell and keep kids, pets, and pests out of the pit. Depending on your model, line up your pipes and wiring with the built-in cutouts, and fasten the cover with screws, bolts, or another method.