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Thread: 2 Pumps same heater?

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    Join Date
    Jun 2012
    Location
    Oakton,Va
    Posts
    39

    2 Pumps same heater?

    I have 1 pump for the spa and pool and when the pump is driving the spa alone its to powerful. I was thinking of installing a smaller pump for the spa alone - but I would like an option to heat both the pool and spa should I choose too. Can it be done? If so can you point me the the diagram?
    35000 gallon inground, 2hp Whisperflo, Pentair FNS Plus, Polaris 380

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    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: 2 Pumps same heater?

    It would probably be simpler all the way around to replace your mega-motor with a two-speed or variable-speed motor. No plumbing mods at all. Just turn it down to a lower speed in spa mode. All the different valves and fittings you'd need to plumb two pumps would probably cost the same as just the motor, not even counting the expense of the second pump.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

    Join Date
    Jun 2012
    Location
    Oakton,Va
    Posts
    39

    Re: 2 Pumps same heater?

    Yeah I am thinking you are right. I happen to have an extra pump, but then I started thinking about the potential amount of rework.
    35000 gallon inground, 2hp Whisperflo, Pentair FNS Plus, Polaris 380

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