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How to Install a Water-Powered Backup Sump Pump

Sump Pump Water powered backup sump pump

A water-powered backup sump pump can provide added protection for your basement in the event of a primary sump pump failure, power outage, or other circumstances that could lead to basement flooding. These pumps use your home’s water supply pressure to remove water from the sump pit, making them an energy-efficient and reliable backup solution. In this article, we will guide you through the process of installing a water-powered backup sump pump in your home.

Gather the necessary tools and materials:

Before starting the project, make sure you have the required tools and materials on hand. These may include:

  1. Water-powered backup sump pump
  2. PVC pipe and fittings
  3. PVC pipe cement and primer
  4. Copper or PEX tubing for water supply connection
  5. Pipe cutter or hacksaw
  6. Adjustable wrench
  7. Screwdriver
  8. Teflon tape
  9. Hose clamps
  10. Mounting hardware
  11. Drill and bits
  12. Pipe straps or hangers

Choose the installation location:

Select an appropriate location for the backup sump pump, ideally near your primary sump pump and close to a water supply line. Ensure that there is adequate space for the pump and its components, as well as easy access for maintenance and inspection.

Assemble the backup sump pump:

Follow the manufacturer’s instructions to assemble the water-powered backup sump pump, including attaching the float switch and any other components required for operation.

Install the discharge pipe:

Connect a new PVC discharge pipe to the backup sump pump’s discharge port using PVC cement and primer. This pipe should run parallel to the primary sump pump’s discharge pipe and be connected to the existing discharge pipe above the check valve using a Y-connector. Secure the discharge pipe to the wall or joists with pipe straps or hangers.

Tap into the water supply line:

Identify a nearby water supply line that you can tap into for the backup sump pump. Turn off the water supply to your home and carefully cut the water line using a pipe cutter or hacksaw. Install a T-fitting, shut-off valve, and pressure reducing valve (if required) in the water line, making sure to use compatible materials and fittings, such as copper or PEX. Apply Teflon tape to threaded connections to ensure a watertight seal.

Connect the backup sump pump to the water supply:

Connect the water-powered backup sump pump to the water supply line using copper or PEX tubing. Attach one end of the tubing to the pump’s inlet port and the other end to the shut-off valve installed in the water supply line. Use hose clamps or compression fittings to secure the connections, as appropriate for the tubing material.

Mount the backup sump pump:

Mount the backup sump pump to the wall or joists using the provided mounting hardware, ensuring that it is level and properly positioned. The pump should be located above the sump pit to prevent accidental submersion.

Test the backup sump pump:

Turn the water supply back on and open the shut-off valve to supply water to the backup sump pump. To test the pump, lift the float switch or simulate a power outage by disconnecting the primary sump pump. The backup sump pump should activate and begin pumping water out of the sump pit through the discharge pipe. Check for any leaks in the water supply and discharge connections, and address any issues as needed.

Secure and organize the plumbing:

Use pipe straps or hangers to secure the discharge pipe, water supply line, and any electrical cords to the wall or joists, ensuring that they are neat and organized.


Installing a water-powered backup sump pump in your home can provide an additional layer of protection against basement flooding and water damage. By following the steps outlined in this guide, you can confidently install a backup sump pump and ensure your basement remains dry, even in the event of a primary pump failure or power outage. Remember to regularly inspect and maintain both your primary and backup sump pumps to keep them functioning effectively and to extend their lifespan. If you encounter any difficulties during the installation process, don’t hesitate to consult a professional plumber for assistance.

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