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Thread: figuring out replacement VS pump requirements

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    figuring out replacement VS pump requirements

    I would like to replace my single speed for a VS pump.

    After reading a few posts it seems that my current 2HP one may be oversized for the pool. Or is it? I also have a spa and the filter system for that is run from the same pump. My head is starting to spin after reading about needing to figure out head etc.

    Help would be much appreciated.

    This is what I currently have

    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Mod Squad jblizzle's Avatar
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    Re: figuring out replacement VS pump requirements

    With a spa, you typically need to keep with the same size pump, otherwise the jets will not work as well with a smaller pump.

    So, either switch out the motor for a 2-speed 2HP version ... using high for the spa (which would be equivalent to your single speed) and low for general filtering.
    Or look at one of the larger VS pumps (Intelliflo, EcoStar, etc) that will allow you to dial in any speed you like.
    The smaller VS pumps (Superflo, etc) are likely too small to give the equivalent flow of your existing pump.
    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: figuring out replacement VS pump requirements

    sorry, put the wrong link up ...
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Mod Squad jblizzle's Avatar
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    Re: figuring out replacement VS pump requirements

    I do not know about that brand ... HP is only 1 part of the story. For example the 2 HP SuperFlo and the 2 HP Whisperflo are very different in the amount of water they move.
    You can get a feel by comparing the head curves (like that table in your link) with your existing pump.

    If you give the INYO guys a call, they are very good at helping and might be able to provide you with information as to whether the head curves are comparable.
    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: figuring out replacement VS pump requirements

    You were right about the inyopool people being knowledgeable and helpful.
    They have recommended their pureline one
    PureLine Prime 2.7 HP Variable Speed Pool Pump - PL2606 - INYOPools.com

    which is a 2.7 HP

    Just a question, am I being daft here but can I just replace the motor? Not the whole pump assembly?
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Mod Squad jblizzle's Avatar
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    Re: figuring out replacement VS pump requirements

    Sure you can replace just the motor which is what I mentioned in the first response.
    Either a 2-speed or a VS. just have to be sure the motor is rated at least as high HP as your impeller.

    You also have to make sure you get the same frame size.
    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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    Re: figuring out replacement VS pump requirements

    Did I misunderstand?
    I thought from your post that I could switch out for a 2 speed motor or I would need a complete pump for VS.

    "So, either switch out the motor for a 2-speed 2HP version ... using high for the spa (which would be equivalent to your single speed) and low for general filtering.
    Or look at one of the larger VS pumps (Intelliflo, EcoStar, etc) that will allow you to dial in any speed you like.
    The smaller VS pumps (Superflo, etc) are likely too small to give the equivalent flow of your existing pump."

    so, can I just buy a VS motor? Just make sure it is 2HP and flowrates are similar?

    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Richard320's Avatar
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    Re: figuring out replacement VS pump requirements

    Quote Originally Posted by surfbabe View Post
    You were right about the inyopool people being knowledgeable and helpful.
    They have recommended their pureline one
    PureLine Prime 2.7 HP Variable Speed Pool Pump - PL2606 - INYOPools.com

    which is a 2.7 HP

    Just a question, am I being daft here but can I just replace the motor? Not the whole pump assembly?
    Yes and no.

    Yes, you can replace just the motor on a pump. I'd call back and ask about this: your motor says frame y56Y The parts diagram for the pump you linked shows the 2.7 HP motor as a 48Y. This page has this tidbit of information
    The only difference between the 56Y and 48Y is the circumfrence (width) of the motor. They will both mount to the seal plate but the 48Y will need an optional spacer (that comes with the motor) to sit on to make up for the difference in size.
    but it would be worthwhile to make sure the adaptor piece is still included and that the opposite scenario still holds true.
    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!

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    Re: figuring out replacement VS pump requirements

    What pump model do you have, if not sure take a picture, the motor is just a part of the overall pump

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    Re: figuring out replacement VS pump requirements

    I don't know what the pump is. I don't have any documents for it and I can't see a name on the assembly. Here are some pics.




    and this is the only "name" I can find. This is on the outside of the basket/inlet

    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Re: figuring out replacement VS pump requirements

    That is the pac-fab challenger pump. So the 56y frame motor is what you want. They are owned by Pentair Pool Products now, they made two different pumps one is a high head pump and the other is a high flow. What all are you running on your pool ie. spa jets, waterfall or any other features. The pump at Inyo Pools is a Hayward super pump and is considered a medium head pump, so it is important to know all that this pump does.

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