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Thread: Replacing Sand with Cart Filter - Multiport Needed?

  1. Back To Top    #1

    Join Date
    Sep 2007
    Location
    Central NJ
    Posts
    59

    Replacing Sand with Cart Filter - Multiport Needed?

    Our sand filter is cracked and the pump seized-up, so replacing both pieces of equipment.
    Replacement pump will be Pentair Intelliflo. Looking to replace the old sand filter with a cartridge filter with max flow rate so that pump can filter & run SWG @low speed.

    The old sand filter had a multi-port valve that was used for backwashing, draining/winterizing, running a spa jets in the stairs & buddy seat, and of course for filtering.

    Do I really need another multi-port valve (I'm thinking not). With a cart filter, there won't be any backwashing and draining/winterizing can be via the pressure release valve. Only concern is for the times the Intelliflo will be cranked-up for the spa jets -- will the extra 'push' @higher speeds be an issue for the filter cartridges or is the rated GPM on the larger cart filters (420 sqft and up) able to handle?

    I plan to run the filter output to a manifold with valves to control the various returns and spa jets.

    Thanks in advance for opinions or suggestions.

  2. Back To Top    #2
    Melt In The Sun's Avatar
    Join Date
    Oct 2009
    Location
    Tucson, AZ
    Posts
    3,899

    Re: Replacing Sand with Cart Filter - Multiport Needed?

    Nope, chop it out! If you get that large a filter, it'll handle the flow just fine; no worries.

    Keep in mind that you'll still want to have some way to drain the pool if you need to, so if you don't have a sump pump you can plumb a 3-way valve to the old waste line.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
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  3. Back To Top    #3

    Join Date
    Sep 2007
    Location
    Central NJ
    Posts
    59

    Re: Replacing Sand with Cart Filter - Multiport Needed?

    Good point about draining the pool!! It doesn't happen often, but I have had that need occasionally over the years. And even though I don't hand-vacuum anymore, probably good to have that type of drain/waste ability for vac'ing to waste.

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