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Thread: Check valve on suction side?

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    Join Date
    Aug 2011
    Location
    Houston, TX
    Posts
    14

    Check valve on suction side?

    I live in a flood plain and the city requires all electrical devices to be about 6 feet above the ground. This means that all of my pool equipment is on a galvanized rack about 6 feet about the ground. I have three independent pumps - 1 main/filter pump, 1 spa jet pump, and 1 water feature pump. Whenever I open the hair/debris traps on the pumps to clean them, all the prime water flows back into the pool. Could I install check valves on the suction side of each pump to prevent the prime from being lost?

    I've heard that check valves don't work well on the suction side, only the pressure side. If that is not true, can someone recommend a good check valve type/brand to install?
    15,000 gallon gunite/aggregate pool with attached spa. Pentair system with Easytouch, 1hp WhisperFlo, FNS DE filter, gas heater, Legend Platinum cleaner, IC40 SWCG, IntellipH acid feeder. Two additional 1.5hp WhisperFlo pumps for additional spa jets and 3 water features.

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
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    22,347

    Re: Check valve on suction side?

    Use the Jandy style Pool check valves and they'll be fine. The weight of the water on the suction side will keep it sealed. They also have less restriction to flow so they won't affect your head as much.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Join Date
    Aug 2011
    Location
    Houston, TX
    Posts
    14

    Re: Check valve on suction side?

    Finally got the Jandy check valves installed. Did the work myself and this has totally solved my problem. I put two 2/2.5 valves on my main pump (one on the skimmer return line, one on the main drain return line) and two 2.5/3 valves on the suction side for my spa jet aux pump and my water feature. I don't have a ton of experience with PVC/CPVC but I found this to be straight forward to cut out a section and glue in the valves. I used purple primer and universal (PVC/CPVC/ABS) glue. I can clean my pump filter baskets and never have to worry about losing prime or refilling the pump with water.

    Thanks for the great advice!
    15,000 gallon gunite/aggregate pool with attached spa. Pentair system with Easytouch, 1hp WhisperFlo, FNS DE filter, gas heater, Legend Platinum cleaner, IC40 SWCG, IntellipH acid feeder. Two additional 1.5hp WhisperFlo pumps for additional spa jets and 3 water features.

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