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Thread: Pool / Spa Replacement Pump.... different pressure?

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    Pool / Spa Replacement Pump.... different pressure?

    I have a 13,000 gallon concrete pool with a spillover spa.
    Originally I had a Jacuzzi pump on this system. Can't remember the model number, but it was a 15 year old 1-1/2 hp unit. Replaced unit with a 1-1/2 hp Hayward SuperPump Single Speed. Pressure has never been the same in the spa. No bubbles, etc. Checked all lines and no blockage. venture valves are clean. I know I can install a blower, but since the system worked fine all these years without one, why would I need one now? Any ideas? Different output on different manufacturers?

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    mas985's Avatar
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    Re: Pool / Spa Replacement Pump.... different pressure?

    Superpump is an up rated pump and has a lower head curve than most other pumps of the same label HP. More than likely, the Jacuzzi pump was a full rated pump with a higher head curve and more suited to spas. When replacing pumps for spas, looking at the label HP is not enough. You must compare the pump head curves to make sure the head curve is at least as high as the old head curve.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: Pool / Spa Replacement Pump.... different pressure?

    Not familiar with "head curve". Don't have the old pump to check - disposed of a few years ago. Numbers I should look for?

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    mas985's Avatar
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    Re: Pool / Spa Replacement Pump.... different pressure?

    Then it becomes difficult. But one thing for sure is the 1.5 HP Superpump is wrong pump for your application. If you want to stick with the Hayward brand, a better choice and one that would work well with the spa is the Tristar 2 HP up rated 2 speed pump # SP3215X202 and has the equivalent power of a 1.5 HP full rate pump which is probably what you had before.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: Pool / Spa Replacement Pump.... different pressure?

    Although I currently have the Hayward Pump, I'm not adverse to changing brands if another pump would work better. Would hate to buy a third pump to correct my issues.

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    Mod Squad jblizzle's Avatar
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    Re: Pool / Spa Replacement Pump.... different pressure?

    It is not the brand that is the problem ... it is the fact that you bought a "smaller" pump even though the HP may be listed the same.

    The Hayward Super II or the Tristar are bigger than the Super Pump you bought. Similarly the Pentair Whisperflo may be appropriate where the Superflo would again be too small.

    Either way I would certainly recommend a 2 speed pump ... although confirm that your pump is wired for 230V since you can not get the larger 2-speed pumps for 115V.
    Jason, TFP Moderator
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    Re: Pool / Spa Replacement Pump.... different pressure?

    Thanks for your suggestions. New pump on the way.

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