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Thread: ??? on Hayward Heat Pump and sand filter.

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    ??? on Hayward Heat Pump and sand filter.

    Hello, maybe someone can direct me correctly.

    I have a Hayward hp21104t heat pump showing P5 error code.

    Phone tech advised to run sand filter on recirculate and that took error code away. Filter shows 22psi after backwashing.

    Units and pool operated no more than 2 months total. (new pool) install

    here are my questions;

    what is an ideal psi for filter?

    should I change sand in filter? What type and size?

    Does heat pump operate on all four speeds of pump?


    Thanks, Al

    Cross posted


    18x42 free form fiberglass
    Hayward variable speed pump
    Hayward sand filter
    Hayward salt chlorinator
    Hayward heat pump.

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    bobodaclown's Avatar
    Join Date
    Apr 2011
    Location
    Murrieta, CA
    Posts
    2,360

    Re: ??? on Hayward Heat Pump and sand filter.

    Depending on the pump size, plumbing runs, turns, filter size all these are factors. What is the pressure in filter mode and bypass mode? It's rare that you'll need to change the sand, maybe a cleaning.
    http://www.troublefreepool.com/threa...-a-Sand-Filter

    It's best to operate the heat pump when on highest speed (heat transfer is better), no sure on the specifics, but others will chime in.
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

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