5 Best Check Valve for Well Pump (Top Pick for 2023)

A check valve is a device that allows fluid to flow in one direction, but not the other. This helps prevent water from flowing back into your well while you are drawing it up for use. Check valves will also allow pressure to be maintained on the line so that there is no airlock that might cause problems with your pump or reduce its efficiency. 

Whether you are looking for a replacement part or considering installing an additional check valve, this guide will help you to choose the best check valve for a well pump. 

5 Best Check Valve for Well Pump Review

1. Midline Valve 432U223 Swing Check Valve

best check valve for well pump

Midline Valve is a leader in the development and manufacturing of high-quality, reliable, and cost-effective valves. They are committed to providing innovative solutions for your valve needs. Their Swing Check Valves are designed to provide positive shut-off under pressure in piping systems. This style of check valve tilts with the flow direction. 

The disc remains horizontal when open so that fluid can pass through but will swing down into a vertical position when the flow stops or reverses due to back pressure which creates an opening barrier against the further flow from the downstream side of the valve. The design provides positive shutoff and is ideal for use in well pumps, irrigation, water treatment, and other industrial applications.


2. Parts2O TC2505LF 1-1/4-Inch Check Valve

Parts2O TC2505LF 1-14-Inch Check Valve Review

It is a brass check valve with stainless steel spring and lead-free construction. It has 1-1/4″ threaded openings, poppet style, and a maximum working pressure of 150 PSI (10.3 bar).

Brass construction makes the TC2505LF durable and resistant to corrosion. The lead-free design also helps ensure compliance with environmental regulations. The stainless steel spring provides reliable performance and long life.

This check valve is ideal for use in a variety of applications, including well pump, irrigation, HVAC, and plumbing. With a maximum working pressure of 150 PSI, it can handle the most demanding tasks. The poppet style allows for easy installation and reliable operation.


3. Merrill CVNL125 1-1/4″ No-Lead Brass In-Line Check Valve 700 Series

Merrill CVNL125 1-14 No-Lead Brass In-Line Check Valve 700 Series Review

The Merrill CVNL125 1-1/4″ No-Lead Brass In-Line Check Valve 700 Series is a complete check valve assembly that includes the valve, seat, and handle. This model features no lead brass construction and is constructed with an abrasion-resistant O-ring for a positive seal. The body of this brass in-line check valve has female NPT threads on both ends to allow connection to a standard garden hose or irrigation tubing.

This 1-1/4 in. x 1-1/4 in. a brass inline check valve allows water to flow freely in one direction while preventing backflow in the opposite direction. The well pump check valve is spring-loaded to close automatically and help protect your water system from backflow contamination. This check valve is ideal for use in irrigation systems, water gardens, and other outdoor applications.


4. Superior Pump 99555 Universal Check Valve

Superior Pump 99555 Universal Check Valve Review

The Superior Pump 99555 Universal Check Valve is a great way to make sure that your water system is working efficiently. This check valve for well pump will fit any 1-1/4-inch or 1-1/2-inch NPT male or female thread and is made from durable ABS plastic. It has a high-quality Nitril-Bruna N seal that will keep it in place when you need it most, and the universal design makes sure that it works with multiple applications. The kit includes the check valve and two adapters so you can use this product for whatever project you have.

This valve is designed to let water pass through in one direction only, so it can help maintain your water pressure when your system is under pressure. It will also work in multiple applications including irrigation, pool systems, hydroponics, sump pumps, and more. This device features two adapters for added convenience whether you are installing the check valve or just using it for maintenance.


5. Hallmark Industries Check valve

Hallmark Industries Check valve Review

This check valve is made of brass, it is used to connect two pipes together in a direction that prevents backflow. The Brass Check Valve has 2 ports: 1 1/4″ National Pipe Thread (NPT) Male Inlet and 1 1/4″ FNPT Female Outlet. It is designed for use with liquids.  Since it has an FNPT (Female National Pipe Thread) on the out, it will only work in one direction when attached to another pipe.

This one-way well backflow preventer feature allows for non-siphoning liquid applications. It is used in Liquid Transfer Systems where pressure or gravity flow can occur. These are not self-closing valves and must be installed vertically to prevent siphoning.


What is The Purpose of a Water Check Valve in a Well Pump?

A water check valve is a type of valve that is used to stop the flow of water in one direction and allow it to flow in the other direction. This type of valve is often used in well pumps to prevent water from flowing back into the pipes after it has been pumped out. A water check valve can also be used to prevent water from draining out of a vessel, such as a water tank.

Use of Check Valves for Well Pump

Backspin: When the motor stops, water in the drop pipe may flow down the discharge pipe if no check valve is present or if the check valve fails. The flow can cause the pump to spin in reverse. If a reverse-rotating pump is started while it is back spinning, it can produce an excessive force that damages the pump shaft.

Upthrust: When there is no check valve or a failed check valve, the pump will start with zero head pressure. The impellers will “float” up and damage the diffusers above when there is little or no pressure. This repeated wear can lead to premature failure of both the pump and motor.

Water Hammer: A busted or leaking check valve might result in a vacuum in the discharge system. Water moving at a tremendous speed enters the void and strikes the stationary water in the piping above it, generating a hydraulic shock when the pump begins. Pipes, joints, or even pumps and motors may be damaged as a result of the shock.


We hope this article has been helpful in making a more informed decision about which pump check valve you should use. If you have any questions or need help finding the best check valve for well pump, please leave us a comment below and we’ll make sure to get back to you as soon as possible!

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