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Thread: faulty SP0710XR50 vari-flo multiport valve gasket?

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    Diver's Avatar
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    faulty SP0710XR50 vari-flo multiport valve gasket?

    i just want to validate my thoughts on this with the knowledgeable folks on this forum.

    when i clean my pump basket, before i open the lid i close the intake valves on main drain and skimmer lines and move selector handle from "filtering" to "close". regardless of that i often have the water draining from the basket past the intake line. it has no place to go but towards the filter. i thought i had a leak somewhere in the filter but it was all dry. i opened the bleed valve on the filter and it start sucking the air in. then i noticed that there is some water coming out from the pool returns.

    so it seems that my multiport gasket is bad and it let the water from the pump to be sucked by gravity thru the filter back to the pool. i also get some water in discharge waste port, but since it's capped it's not a big problem.

    is this a correct conclusion? how bad is it if left as it? are the any special trick about changing the gasket? it seems that it would be spring loaded, so i don't want to get in a situation where i'm not able to put it back together without a special tool.

    thanks!
    26K In-ground Vinyl Pool | Hayward DE4820/SP0710XR50 filter | 1.125 HP Dual Speed Hayward Super Pump | Aquasol Solar

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    Mod Squad Bama Rambler's Avatar
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    Re: faulty SP0710XR50 vari-flo multiport valve gasket?

    It sounds like the gasket is the culprit. They're not hard to change.

    Since you're getting water out the waste port that's a definite indicator that the gasket is leaking. I'd replace it and stop capping the waste port. Capping the waste port is like putting tape over the check engine light, you're just hiding a problem.
    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
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    Diver's Avatar
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    Re: faulty SP0710XR50 vari-flo multiport valve gasket?

    Dave,

    as usual thanks for informative response. i will be taking the filter offline this sunday since i'm closing my pool, so i will have plenty of time to replace the gasket.
    26K In-ground Vinyl Pool | Hayward DE4820/SP0710XR50 filter | 1.125 HP Dual Speed Hayward Super Pump | Aquasol Solar

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