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How To Install a Sump Pump Check Valve: 5 Steps & Tips

How To Install a Sump Pump Check Valve: 5 Steps & Tips

If your home or business is in an area prone to flooding, a sump pump is one of the most important things you can install. They were first invented in 1946 as a means to keep water from pooling by pumping it out of and away from a building or structure. Sump pumps have to function properly to be effective. When components wear out, you run the risk of system malfunction and unexpected water damage. A sump pump check valve is one of the essential elements of the system.

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What is a sump pump check valve? It is a device that keeps water from reentering the discharge pipe whenever the pump is not running. It keeps your system from repumping the same water over and over again. Installing a sump pump check valve is a straightforward process, but you need to know what you are doing. Incorrect installation could cause your pump to fail and result in damage to the system. The steps below guide you through the replacement process so that you can have peace of mind that your sump pump is functioning as it should.

Check Valve Basics

A sump pump check valve is also known as a “one-way valve.” That’s because they keep water from entering back into the discharge pipe whenever the motor has completed pumping. Check valves are usually made from metal or hard plastic. You can find them attached to the discharge pipe, although some may be mounted on the top of the pump.

When a sump pump check valve is not working, water flows back from the discharge piping into the sump pump pit. This means your system ends up pumping the same water again and again. So, a check valve can cut down on electrical costs and prolong the life of your motor.

If your sump pump is often running, it could be a sign that your check valve needs replacing. Also, if you think your valve is leaking, you can pour some water into the pit and wait for it to kick on. Check for moisture around the valve, but also inspect other pipes for leaks as well.

Tips & Insights: Ways to Replace a Sump Pump Check Valve

How To Install a Sump Pump Check Valve: 5 Steps & TipsCheck Valve Installation Steps

If possible, drain any water from the sump pump pit. Then be sure to disable electricity to the system. If you are unplugging the device, be sure to keep the cord away from any standing water.

Gather the Correct Parts

You will first need to know what parts to buy, including the correct size sump pump check valve to correspond with the diameter of the pipe. PVC pipe often has its dimensions printed on it. If it does not, measure the end of the discharge pipe and buy the appropriate replacement check valve. Most are either 1 1/4 to 1 1/2 inches.

You will need PVC couplings and nuts that can adapt an ill-fitting sump pump check valve into your drainage pipe. Also, you will need PVC cement, sandpaper, and a hacksaw or pipe cutter.

Determine Positioning

If you are not replacing but installing a new check valve, be sure you have the right pipe leading from the sump pump outside your home. The closer you can position the check valve to the pump, the better. This limits the amount of water that can accumulate between the pit and the valve. To determine how much pipe to remove, measure the distance from one coupling to the other. If you purchased a valve with hose clamps, measure from between each set.

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Sump PumpCut the Pipe

Use a pipe cutter or hacksaw to sever the piping where you would like the check valve to go. If you are uncertain of the amount that you should remove, start small, then cut extra segments, if necessary. If you are replacing an old valve with metal clamps, loosen them and remove the device. If the valve has been cemented in, try heating the adhesive with a hairdryer, then loosen the valve with plyers.

Install the Replacement Valve

Test to see if the check valve fits lengthwise. Then sand down the ends of each section of the pipe until they are smooth. Place the PVC nuts then the couplers onto each rim of the pipe ends. If the check valve came with rubber o-rings, slide those into place as well. Then position the check valve and tighten the hose clamps. Finally, turn the couplers clockwise to tighten the connections.

Once you are certain that everything fits snugly, remove the valve. Apply PVC cement to the surface area of the couplings where the valve connects and reassemble the configuration. Allow the adhesive to dry for several hours before running the sump pump.

Test the Check Valve

Turn the pump back on and test it to see if it operates. Again, pour water into the pit and wait for it to kick on. You may hear the check valve internal flap as the water surges and then stops.

Once the pump drains the water, look to see if any reverses into the pit. If there are none and no leaks throughout, then your sump pump check valve installation was a success.

Sump Pump Repair and Installation ServicesDon’t Wait To Replace Sump Pump Components

Now that you know how to install a sump pump check valve, you can get your system back up and running. If for any reason you feel that a DIY check valve replacement is beyond your expertise or comfort level, hire a professional to do the job. You will know that it’s done right and that your sump pump will work properly.

Our staff of local plumbers provides various types of plumbing services such as sump pump repair, sewer line replacement, drain cleaning, and water heater repair. We can work on any system, regardless of how old or who the manufacturer is. Reach out to us today to get a quote on your sump pump repair or components replacement.

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