How to Install a Sump Pump Battery Back up

Having a sump pump battery back up will provide an extra mode of protection to your basement if the primary unit fails. Installing one is easy when you have the right tools and materials for the job. There are many different models available. This guide will help you install it regardless of the make or model. You should also read the instructions that come with the model you’ve bought prior to installation.

Tools and Materials

  • Hack saw or electric saw
  • Level
  • A measuring device
  • Screwdriver
  • Wrenches
  • Electric drill
  • Battery—including box, control unit and filler
  • Pump
  • Switch or float switch
  • Bucket
  • PVC Pipe, Y and L fittings and valve
  • Primer and glue

Step 1: Preparation and Removing the Check Valve

Unplug the pump from the socket. Using your screwdriver, unfasten the couplings on the bottom part of your check valve. Release the water from the valve into a plastic bucket. Unfasten the screws on the top coupling and remove the check valve completely before installing the sump pump battery backup.

Step 2: Measuring and Cutting the PVC Pipe

Measure the new PVC pipe against your old one and mark it for cutting. Use a jig to stabilize the pipe and cut it using the saw. Clean the fresh cut and apply primer to it. Glue the PVC adapter to the new pipe and hold it together for at least 30 seconds to make sure it’s completely sealed.

Step 3: Installing the New PVC Pipe and Pump

Screw the PVC pipe into the pump until it has a tight fit. Use the electric drill to cut the weep hole into the pipe above the pump. Set the new pump and pipe into the pit. Put the coverlid over the pipes, threading them through the different holes.

Step 4: Installing the Y and L Fittings

Install the Y fitting above the old check valve and the L fitting on top of the new pipe for your sump pump battery backup. Measure and cut a new piece of pipe to act as a joint between the newly installed Y and L fittings.

Step 5: Setting the New Check Valve

Attach the new check valve between the bottom part of your L fitting and the newly laid pipe. Set the rubber couplings between the check valve and the pipe. Using a screwdriver, fasten the screws of the coupling until it provides a snug fit.

Step 6: Installing the Battery and Control Unit

For the sump pump battery backup, place the battery in the plastic battery box. Attach the terminals to the battery, making sure you set the positive and negative couplings in their correct position. Connect the battery to the backup control unit, and then plug in both the primary and secondary pumps. The control unit’s power indicator and battery life will come up.

Step 7: Final Inspection

Let the system run for 5 minutes after installation. Look for leaks, especially at the check valves and the newly installed fittings and adapters. Check the control unit to see the charge level of the new battery. New batteries will not be charged. Monitor the level and keep it at full. Do a daily check for leaks and battery level during the first week. You now have a sump pump battery backup installed in your basement.