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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

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    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

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    I would think by this time, a synthetic impeller would be available for pumps like this.
  3. boatpoor, Jul 26, 2024
    #3
    boatpoor

    boatpoor Senior Member

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    316 would last a while but it would be expensive.
  4. Capt Ralph, Jul 26, 2024
    #4
    Capt Ralph

    Capt Ralph Senior Member

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    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.
  5. Pascal, Mar 19, 2026 at 12:32 PM
    #5
    Pascal

    Pascal Senior Member

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    And other one bites the dust…. I switched to the stand by pump while in the Exumas a couple of weeks ago and finally got to replace the one that failed.

    Pretty clear why it failed!

    May really have to bite the bullet and redo the plumbing to accommodate a March pump. It’s all schedule 80 with quick release valves and not enough pipe length to cut and splice new plumbing

    Attached Files:

  6. boatpoor, Mar 19, 2026 at 6:41 PM
    #6
    boatpoor

    boatpoor Senior Member

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    Give me the make and model and I'll see if my friend can quote you some duplex ss parts.
  7. Capt J, Mar 19, 2026 at 10:45 PM
    #7
    Capt J

    Capt J Senior Member

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