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Thread: New pump time

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    New pump time

    My pool pump has gotten very noisy and it's time for a replacement (this one is about 10 years old from what I can tell).

    I have a rectangular pool 20x40 so about 33k gallons with 1.5 inch piping. The current motor is a pinnacle 1 hp single speed. The previous homeowner was running the pump 24/7 for the 5 month season.

    I'd like to find out your opinions on switching to a pentair whisperflo 2 speed 1hp. From what I've read, I should be able to run this on low during the day and then high at night. Any other recommendations? Do these have a timer for switching?

    I honestly don't have a problem with a single speed but my goal is quieter and under $600 - I have no issues continuing to run it 24/7.

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    Mod Squad jblizzle's Avatar
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    Re: New pump time

    Welcome to TFP!!!

    If the pump itself is still fine, it would be cheaper and easier to just install a 2-speed motor on your existing pump (no plumbing required). Just add an external switch to manually select speed and generally leave it on low all the time, except when you are vacuuming or backwashing.

    There is also no reason to be running a pump more than about 4-6 hours per day typically. See this: Determine Pump Run Time

    If you do not have a timer, then I would suggesting adding one for on/off control. Optionally, you can add another timer to automatically change speeds.

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    Jason, TFP Moderator
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    Re: New pump time

    That's a great idea! Any suggestions for 2-speed motors?

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    Mod Squad jblizzle's Avatar
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    Re: New pump time

    Any that match the SFHP rating (service factor * HP) of your existing motor and have the same motor frame.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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    Mod Squad jblizzle's Avatar
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    Re: New pump time

    What is the HP and SF listed on your current motor? The new one must be at least that size or you would need to add a smaller impeller.

    Also note you need to replace the shaft seal when you change the motor.
    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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    Re: New pump time

    I saw that about the shaft seal - do o just buy a generic one? The one I currently have is a 1hp and 1.25 sf.

    - - - Updated - - -

    This seal mentions pinnacle pumps - Pentair Shaft Seal OEM 5/8 - 354545S - INYOPools.com
    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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    Re: New pump time

    Thanks so much for your help. The two speed 1 hp with that seal is under $400. Sounds good to me.
    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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    Mod Squad jblizzle's Avatar
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    Re: New pump time

    OK, so the smaller 1.25 HP motor is all you need (the bigger motor would work with your existing impeller, but just costs more although not much) and seems like that shaft seal should work.

    There are also go-kits that include all the seals in the pump plus the shaft seal.
    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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    Re: New pump time

    I ordered the larger one since the hp number was the same and it was only a $4 difference and I also got a full tune up kit which includes the seal. This will definitely be a lot quieter!
    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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    Re: New pump time

    Got the new motor installed and I'm getting a fault 7 error code which it says over current fault - disconnecting power and rotate the shaft. So did I over tighten the propeller?? Not sure what to do.
    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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    8500 gallon IG Pebble Sheen with Spa. 3hp Pentair VS Intelliflo ( pool ), 3/4 hp WhisperFlo ( water feature ),Pentair Racer, 400K Pentair heater, Pentair 500sqft Cartridge filter, EasyTouch 8, Stenner 45mp2 15gallon wired to ET8

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    Re: New pump time

    Good so I did everything correct for wiring BUT I'm trying to hunt down if I'm now running or attempting to run 115v to 230v motor
    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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    Mod Squad jblizzle's Avatar
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    Re: New pump time

    There is a plate on the motor that says how to wire it. They are usually 230v motors.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: New pump time

    Quote Originally Posted by GiantsnationNY View Post
    Got the new motor installed and I'm getting a fault 7 error code which it says over current fault - disconnecting power and rotate the shaft.
    So turns out A.O. Smith (Century motors) is hiding a bit of information here. Nothing in the manual (or common sense) says that when this error occurs it means a defective unit - essential DOA. I'm really disappointed that they don't mention this.

    Luckily, I've called Century and they're sending me a new motor.
    33k gallons IG vinyl pool (20x40) with a Hayward 18" sand filter.

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