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Thread: Replacement recommendation: .75 HP 1-speed for energy eff

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    Replacement recommendation: .75 HP 1-speed for energy eff

    I have a .75 HP pool pump (220V) that I believe is single speed and I'd like to replace it with something more efficient. I've attached a picture of the motor label. I think it's a Sta Rite pump, but I can't find a label. I'd like to go either 2-speed or variable speed. I have a booster pump for the sweeper and no fountain, solar, etc. to run, so I'm assuming I can stay fairly simple.

    Any recommendations?
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    15K gal, IG plaster, 3/4 HP pump, Pentair CCP320 320 sqft cartridge filter, Letro Legend cleaning robot

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    linen's Avatar
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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    Assuming your current motor is running at 230 volts (or you have the wiring at the pump for 230), the a.o. smith B2890 should work for you. It is 56Y (yours is 48y) but both are the same square flange, so it should fit.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    The wiring is 230V. Is the 56Y a 2-speed or VS? And would I need a new timer to make it work? My current is a mechanical Intermatic.
    15K gal, IG plaster, 3/4 HP pump, Pentair CCP320 320 sqft cartridge filter, Letro Legend cleaning robot

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    Mod Squad jblizzle's Avatar
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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    That is a 2-speed. You would either need to add a switch to manually select the speed (what I did) or add another timer to automatically switch speeds. Likely manually would work too just run on low most of the time and switch to high for vacuuming/cleaning.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    bobodaclown's Avatar
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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    Hello,
    I added a simple toggle switch to switch between hi/low speed. I've got a simple mechanical timer (on/off). My pump does prime in low speed no problem, it just takes a little bit longer.

    You can get a two speed with timer: https://www.americanbestpoolsupply.com/detail/13495.htm

    I was looking at that earlier my system is 115V so it wasn't going to work, but here's what others have said about it:
    great-find-2ez-speed-75hp-square-flange-2-speed-300-t42909.html

    I think it's a good deal for the price. Remember though you'll need to replace the shaft seal when you install it. I've found my local pool stores will swap out the motor and replace the seal for about $20 labor, $15 for the seal.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Mod Squad jblizzle's Avatar
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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    When you open the system, you should prime the pump in high speed. Once primed, it should not lose it so it should have no problem starting on low. If your pump drains when off, you have a leak.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    I am going through this right now. After a posting here, The many replies I got were to go 2 speed. I had to do pump also as I had a C flange pump. The replies I got steered me to the 2 speed 1hp super pump I got on Amazon. Waiting for it to come on Wed. I have noticed a couple of posts on this site about wiring the 2 speed up, and also using a mech. timer box. Intermatic make one, it is on Amazon for about $160.
    IG plaster free form, '04, 1hp pentair super flow 2 speed, hayward star-clear 175 sq. ft. cartridge filter, barracuda G4, no spa or features, screen enclosure

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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    Hey Jason, not to thread hijack since its related to the OPs topic, but how do you like your pump?

    This is it correct?

    http://www.amazon.com/Pentair-340042-St ... speed+pump

    My super pump is dying so I'm looking at the pump above
    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

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    Mod Squad jblizzle's Avatar
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    Re: Replacement recommendation: .75 HP 1-speed for energy ef

    No issues, but only about a year old. I think slightly louder (still just as hum) than my old pump on high, but near silent on low. The louder noise could just be due to the different paver I have it sitting on.

    I like that it came with the switch and that it comes with and uses union fittings instead of screw in fittings for the plumbing as well.
    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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