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Check Valve - 1 1/2" Threaded

Check Valve - 1 1/2" Threaded

SKU:S 1520-15F

Regular price $39.99
Regular price Sale price $39.99
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Valve is 1 1/2" Threaded.


A check valve in a swimming pool system is a crucial component that helps regulate the flow of water and prevents backflow. Here's a brief overview of its function and importance:

Function of a Swimming Pool Check Valve:

  1. Preventing Backflow:

    • One of the primary functions of a check valve is to prevent water from flowing backward in the pool plumbing system. This is important to maintain the proper direction of water flow and to prevent any potential damage to equipment or disruption in circulation.
  2. Maintaining Prime:

    • In pool systems, maintaining prime is essential for the efficiency of the pump. The check valve helps in this regard by preventing water from flowing back into the pool when the pump is turned off. This ensures that the pump doesn't lose its prime, which would require it to work harder to reestablish proper water circulation.

Types of Check Valves Used in Swimming Pools:

  1. Swing Check Valve:

    • This type of valve has a hinged flap that swings open in the direction of flow and closes to prevent backflow. It's commonly used in pool plumbing.
  2. Common Installation Points:
  1. Before the Pump:

    • Placing a check valve before the pump helps maintain the prime by preventing water from flowing back into the pool when the pump is off.
  2. After the Heater:

    • Installing a check valve after the heater prevents hot water from flowing back into the pool when the heater is not in operation.
  3. In Salt Chlorine Generator Systems:

    • Check valves are often used in systems with salt chlorine generators to prevent backflow of chlorinated water into the pool equipment.


  1. Regular Inspection:

    • Check valves should be inspected regularly for any signs of wear, corrosion, or damage.
  2. Cleaning:

    • If a check valve becomes clogged with debris, it may not function properly. Cleaning may be necessary.
  3. Replacement:

    • Check valves, like any mechanical component, have a lifespan. If a valve is no longer functioning correctly, it may need to be replaced.

In summary, a swimming pool check valve is a critical component that helps maintain proper water flow, prevents backflow, and ensures the efficient operation of pool equipment. Regular inspection and maintenance are essential to keep the system functioning optimally.