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Thread: Hayward SelectFlo SP740DE...rebuild or replace?

  1. Back To Top    #1

    Join Date
    Apr 2010
    Shoreacres, TX

    Hayward SelectFlo SP740DE...rebuild or replace?

    My Hayward DP740DE select flow valve has been hard to turn lately so I tore it down to inspect the spider gasket and lube where necessary. The "key"assembly where the spider gasket resides has some damage (thin outer gasket support is cracked and should be replaced). I can find the valve stem/key assembly online for less than $50 shipped or I can buy the entire valve, key, stem, cover assembly for a little over $100. How hard will this be to disassemble and reassemble? Should I look into replacing the entire assembly altogether even though everything else looks good upon inspection? I'm not a pool guy but this forum also manages to keep me from losing any more hair so I'm looking to you all for advice.
    16K IG Plaster Pool w/ Hayward 36sq.ft. DE filter I'll have to add the pump info when I can get to it.
    Testing with TF-100!!

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Hayward SelectFlo SP740DE...rebuild or replace?

    The repair is fairly simple, and less expensive, so I would go that way.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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