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Thread: Switching to a VS pump.

  1. Back To Top    #1

    Join Date
    May 2016
    Long island ny

    Switching to a VS pump.

    Hey thinking about changing pumps this year from a 2hp superpump to a Hayward VS superpump.
    I have the VS pump in hand.
    I have some concerns about the plumbing.
    I currently am running a 2hp superpump with 2" plumbing all around. The VS pump is only a 1.5hp with 1.5" threads on the housing. Reducing the plumbing is no big deal but im wondering what the effect of the smaller pump with the big plumbing is going to do to my flow back into the pool. As it is when i run the waterfall my jets dont get the best pressure and i usually turn the stairs off for optimal water movement.

    So i guess my question is.......does the new VS have the same output as my old 2.0hp pump or will i be disappointed with how the pool runs.
    I dont want to do all this work only to have the pool run worse all to save some money on my electric.
    Would any of you service techs do this for your customers?

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Switching to a VS pump.

    The larger plumbing will allow the pump to move more water than it would with smaller pipe ... absolutely no issue here, in fact larger pipe is usually better.

    But, I think the VS pump is only a 1.5HP vs your apparent 2HP, so the VS is likely to move less water at full speed than your existing pump does.

    You can look up the head curves on the Hayward website and confirm.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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  3. Back To Top    #3

    Re: Switching to a VS pump.

    There are rebates available from some local utilities like this one:

    PSEG Long Island
    Chicago, IL
    30K gal, InGround Plaster Finish, 3.5'-9.5', Maytronics S300 Cleaner

  4. Back To Top    #4
    chiefwej's Avatar
    Join Date
    Jun 2011

    Re: Switching to a VS pump.

    I think you would be happier with a larger pump. I replaced a 2hp single speed with a 3hp intelliflo VS pump. I can dial it down and save a lot on my energy cost, but if I want extra power it's always available. With single speep or two speed, you want the smallest power that will work, but with a VS pump there is no penalty (other than initial cost) for having a larger pump. You can always dial it down, but the extra capacity is always there. Same theory as buying an oversized SWG.
    Tucson, AZ
    19k gallon Pebble Tec play pool/spa, Pentair Intelliflo VS (3 hp) 011018, Super II 2hp (for spa), Aqua Rite T-15 SWG, Pro Grid 60 DE filter, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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