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Thread: Jandy Valve Sizing

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    maxepr1's Avatar
    Join Date
    Mar 2011

    Jandy Valve Sizing

    When looking at Jandy valves there are 2 sizes listed 1.5/2 2/2.5, I assume the PVC can either go inside the valve or outside, correct? Is there a better way, inside or out? Or is this just to narrow down the sizes for more of a universal design for Jandy to produce fewer valve sizes instead of 4 sizes make 2?
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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Jandy Valve Sizing

    The smaller number is the size pipe that will slide into the valve. The larger number is the size pipe that matches the valve pipe size and requires a coupler.

    I do not think is is normal to slip the pipe on the outside of the valve. Otherwise you can imagine there would be a quick reduction in pipe size for the flow.

    So if you want fewer connections and not have to buy couplers, get the size where your pipe will slide into the valve. The internals are the same and the head loss is basically the same regardless of the pipe size you use with the valve.
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