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Bronze impeller / head pumps

Discussion in 'HVAC' started by Pascal, Jul 26, 2024.

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  1. Pascal, Jul 26, 2024
    #1
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,474
    Location:
    Miami, FL
    Why I don’t like Scott and Cruisair air con pumps with bronze heads and impellers:

    IMG_2295.jpeg
    after a few years the impeller and the head erodes and flow drops. We have two pumps on the 110 I run, with only one running at a time. Couple of days ago I switched to this pump and noticed my coils were running a little hotter. Decided to replace it this morning with a spare rebuilt we had on board. Bette reflow, chillers running 10 degrees cooler and sure enough the impeller is eroded. It had a label on it indicating it was about 5 years old

    I much prefer March pumps unfortunately the plumbing is all sch 80 PVC so connecting a big March is a major job. :(
  2. Capt Ralph, Jul 26, 2024
    #2
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,270
    Location:
    Satsuma, FL
    I would think by this time, a synthetic impeller would be available for pumps like this.
  3. boatpoor, Jul 26, 2024
    #3
    boatpoor

    boatpoor Active Member

    Joined:
    May 4, 2016
    Messages:
    244
    Location:
    32407
    316 would last a while but it would be expensive.
  4. Capt Ralph, Jul 26, 2024
    #4
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,270
    Location:
    Satsuma, FL
    I have a cast housing, welded impeller, industrial SS pump head.
    From a deal and it was still expensive. I think it was meant for continuous running and not start/stop.
    It held up great in salt water. Strange but that impeller did not start up worth a phart.
    Once it cleared it self would pump great but sometimes I would get a HP fault before it cleared it self.
    Still have it if anybody wants it.