Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Looking to replace single speed motor with 2-speed motor

  1. Back To Top    #1

    Brentr's Avatar
    Join Date
    Oct 2009
    Location
    Jacksonville, FL
    Posts
    1,615

    Looking to replace single speed motor with 2-speed motor

    Hi all, my 1.5hp Starite duraglas 1, P2RA series pump shaft seal is leaking, so I decided if I was going to do that I would look into a 2 speed motor. There is a guy selling pumps on craigslist that was a warranty person for Jandy and has a lot of 2 speed motors for sale. He only has round flange pumps and from what I can tell I have a square flange motor. He tells me that he has an adapter that converts to a square flange. He also tells me that he has shaft seals.
    So my question is
    1. Do all pump housings use the same size shaft seal?
    2. Does Jandy make most of the pool pump motors?
    3. Can you retrofit a round flange using a square flange adapter and will the shaft be the same length for the impeller to line up properly in the impeller housing?
    I welcome all thoughts and experiences on this matter.
    6,000 gal, IG free form,Beach Series Antigua by Marbletite Pebble finish,Sheer Descent, IG Fountain, Dolphin / Mermaid Statues,Dura- Glas 1.5hp pump,Hayward Pro-grid DE4820, Aqua Rite SWG with T-Cell 15,Heat Siphon Heat Pump DX 5.0 109,000 btu, Pool Cage, 1800sq ft Tremron Estate Pavers,Aquatherm Ecosun Solar Panels 192 sq ft with GL-235 Controller,Pentair IntelliBrite, Apollo Magnetic Stirrer Our New Poolbuild, Jacksonville, FL yr 2009 Solar install Outdoor kitchen upgrade

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,481

    Re: Looking to replace single speed motor with 2-speed motor

    1. No - You must get the shaft seal made for the pump although many pump lines do use the same seal. Cross reference
    2. No - Pump manufactures do not make motors. A.O.Smith now century makes the most of the motors for pump manufactures (Jandy, Pentair, Hayward). Emerson and US Motors/Nidec are other manufactures in addition to a couple of other smaller players.
    3. I am not sure about this one.
    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

  3. Back To Top    #3

    In the Industry
    Citizen's Avatar
    Join Date
    Oct 2014
    Location
    Orlando, FL
    Posts
    92

    Re: Looking to replace single speed motor with 2-speed motor

    Quote Originally Posted by Brentr View Post
    Hi all, my 1.5hp Starite duraglas 1, P2RA series pump shaft seal is leaking, so I decided if I was going to do that I would look into a 2 speed motor. There is a guy selling pumps on craigslist that was a warranty person for Jandy and has a lot of 2 speed motors for sale. He only has round flange pumps and from what I can tell I have a square flange motor. He tells me that he has an adapter that converts to a square flange. He also tells me that he has shaft seals.
    So my question is
    1. Do all pump housings use the same size shaft seal?
    2. Does Jandy make most of the pool pump motors?
    3. Can you retrofit a round flange using a square flange adapter and will the shaft be the same length for the impeller to line up properly in the impeller housing?
    I welcome all thoughts and experiences on this matter.
    What Mark said and why would you want to go through all that extra work of number 3? Just get the right motor frame and be done with it

  4. Back To Top    #4
    n240sxguy's Avatar
    Join Date
    May 2014
    Location
    Benton, KY
    Posts
    1,800

    Re: Looking to replace single speed motor with 2-speed motor

    It would be best to get the motor that fits the pump. If all that's wrong is a $10 seal, then I don't see the justification of changing the motor unless your electric rates are high enough to be worth it.


    30K gallon IG vinyl. 1.5HP 2-speed Waterway Mustang pump. 600 lb sand filter. Polaris 280. Circupool SI-60+. TF-100

  5. Back To Top    #5
    bobodaclown's Avatar
    Join Date
    Apr 2011
    Location
    Lakeland, FL
    Posts
    2,351

    Re: Looking to replace single speed motor with 2-speed motor

    Hello Brent,
    Definitely just get the square flange motor. I have a similar setup, but would need to know what impeller you have to be sure? I did switch from a single to 2-speed motor. My set-up is for 115V (3/4 HP). I needed to purchase a high/low speed switch separately. I documented my journey here in this link:

    http://www.troublefreepool.com/threa...=2-speed+motor

    Overall I'm very happy with the two-speed motor. I have a robotic pool cleaner, so low flow isn't an issue. On high speed it flows about 52 GPM, low is about 22 or so. My SWCG doesn't complain, but the heat pump won't come on in low, It will come on in High speed, and then I can swap to low. (Don't use it too much.)

    You'll need to decide if you want to switch high/low speed manually or get a new timer? Also 115V or 230V? What size motor do you need. If you're looking for a timer model the EZ2-speed can be found for reasonable pricing. I've been happy the rebuilt motor. That is also a route to check. Whatever you decide make sure you don't reuse the shaft seal, even if you've just replaced it.
    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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •