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Thread: Sta-Rite PLBC-178l Booster Pump Replacement Suggestions

  1. Back To Top    #1

    Join Date
    Apr 2015
    Granada Hills, Ca

    Sta-Rite PLBC-178l Booster Pump Replacement Suggestions

    Hello everyone,
    As stated in my title, I have a circa 1999 Sta-Rite 1/2 HP Model PLBC-178L Booster pump that is getting very loud and I believe is in need of replacement. (25,000 gal in-ground pool with a Polaris 380)
    I would like to get some opinions as to whether I should replace the pump like for like, or look at something more efficient.
    It was suggested that I consider a Pentair LA-MS05 "Boost Rite" pump, but it is 1.1 Hp as opposed to my current 1/2 Hp...could this be a problem? also fittings are 1" compared to 3/4' on current pump.
    Lastly I was looking at th Polaris PB4-60 3/4 Hp which seems to be highly rated, and matches up well, in regard to Hp and suction connection is 3/4".
    I am also worried about matchup plumbing.
    Any advice or suggestions would be greatly appreciated.


  2. Back To Top    #2
    bobodaclown's Avatar
    Join Date
    Apr 2011
    Murrieta, CA

    Re: Sta-Rite PLBC-178l Booster Pump Replacement Suggestions

    Hello Sandy,
    Looking at the diagram here: Sta-Rite PLBC Booster Pump Parts -

    Why not just replace the motor and move on. You don't want to go with the 1.1 HP it uses more energy (waste of money).

    All you'll need is a new motor and shaft seal. Much cheaper than replacing the whole thing.
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

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