If your basement sump pump doesn't have a check valve, consider installing one. A check valve is a metal flap connected to the discharge pipe The valve stays closed until water pressure opens it, and once the water pressure lowers, the valve closes to prevent back flow from lingering water. Here are some tips to install a sump pump check valve.
Prepare to Work
For this project, you need:
- work gloves
- tape measure
- old towel
- utility knife or metal file
- pipe cutter
- pipe cleaner
- PVC cement
- PVC applicator
- adapters or couplings
- sump pump check valve
Drain water and debris such as pebbles or sludge from the sump pit. Unplug the sump pump, measure the diameter of your drain pipe, and take the measurements to your local hardware store.
Bring a sample of your discharge pipe, so you can fit the valve and the couplings or adapters.The discharge pipe is commonly located next to the sump pump pit.
Cut the Discharge Pipe
Choose a location for the check valve.on the pipe. The idea location is close to the sump pump pit to keep too much water from getting stuck between the check valve and sump pump
Read the manufacturer's instructions for suggestions on the height. Keep an old towel handy to clean water that may fall from the discharge pipe as you work.
Mark the length of the valve on the pipe, and cut the pipe in two locations with the PVC pipe cutter. Cut a small portion of the pipe at a time to ensure you don't cut too much, then file the edges with a utility knife or metal file. If you need the connection to be longer, add a piece of pipe, and join it with couplings or adapters.
Install the Check Valve
Use the pipe cleaner to clean inside the discharge pipe. Dry fit the check valve to the pipe before you install it. The check valve commonly has an arrow indicating the direction the water should run.
Add the couplings or adapters to the discharge pipe openings. Seal the joints with the PVC cement and PVC applicator, check for gaps, then let the cement dry.
Reconnect power to the sump pump, and pump some water into the pit. Listen for the water pressure to build.
If the valve works correctly, you will hear the flap open as water pressure increases. When you turn the sump pump off, you should hear the flap on the check valve close. If the check valve doesn't operate correctly, or you still have back flow problems elsewhere, contact a plumbing company like AA Plumbing for assistance.