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Thread: 2-way valve on input to pump?

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    2-way valve on input to pump?

    Is there any practical reason to want/need a 2-way on the suction side of the pump? Im just wondering if I will ever need to turn the water off for any reason at that point.
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

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    Mod Squad jblizzle's Avatar
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    Re: 2-way valve on input to pump?

    The only reason would be if the pump was below water level and you would need to close it when you wanted to clean the pump basket. OR if you have multiple suction lines, you could either have a 2-way on each or a 3-way to select between the floor and the skimmer (Since this is new, I certainly hope you are running the floor and skimmer to the pad separately).

    You signature is not clear if it is an in-ground pool.
    Jason, TFP Moderator
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    Re: 2-way valve on input to pump?

    Yes, it is an inground and I ran a 2" from the main drain to the pad, a 2" from skimmer 2" to pad and 2" from skimmer 1.5" to pad as a backup. Pump will be slightly below level of water. I will have a 3-way connecting skimmer/main drain feeding into pump.

    I was thinking of taking the output from the 3-way, feeding it into a 2-way prior to entering pump.
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

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    Mod Squad jblizzle's Avatar
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    Re: 2-way valve on input to pump?

    I know the Pentair valve have a little pin you can pull that allow you to shut off the center port (so no 2-way would be needed because the 3-way could shut it down). But, I am not sure if the Jandy valves are as easy or if you have to cut off or modify the stops.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: 2-way valve on input to pump?

    Quote Originally Posted by jblizzle
    I know the Pentair valve have a little pin you can pull that allow you to shut off the center port (so no 2-way would be needed because the 3-way could shut it down). But, I am not sure if the Jandy valves are as easy or if you have to cut off or modify the stops.

    Hmmm, it is a hard plastic stop. I could file it down. I wonder though if that is more risky/hard than putting in a 2-way. I already have extra 2-ways.
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

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