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panamea's avatar
panamea
Explorer
Sep 05, 2018

45 psi fresh water pump in a 20-30 psi system

I need to replace the fresh water pump on my motorhome (old one got stolen while during renovations). The rig manual says the system is 20-30 psi but I found a new pump on kijiji that is rated at 45 psi. Any issues along the road if I buy that one?

Thank you
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Sep 05, 2018
    1984 vintage ........

    Bet you have 'GRAY' plumbing lines/fittings

    It is 'Quest' piping......Polybutylene pipe
    The pipe is OK but the aluminum bands/clamps fail.

    If you have Copper crimps or threaded fittings it is OK
  • ScottG's avatar
    ScottG
    Nomad
    Sep 05, 2018
    It will be fine with the 45 PSI pump.
    Even when you connect to city water your going to be at least 40~45 psi in most cases.
  • STBRetired's avatar
    STBRetired
    Explorer
    Sep 05, 2018
    Most pumps have a pressure adjustment. You should be able to turn it down, even though you probably don't need to. Most city water connections are higher than 20-30 PSI.
  • fj12ryder's avatar
    fj12ryder
    Explorer III
    Sep 05, 2018
    Leaks? It's about twice the pressure. But it might be okay, probably will depend on the state of your plumbing, or rather the state of your RV's plumbing.

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