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4788 Fresh Water Pump Question-gctid823082

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  • Kwood
    replied
    Also, depending on the total wire length [round trip], you may have excessive voltage drop. That will reduce pump performance and may effect longevity.

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  • Norton_Rider
    replied
    Here's a good reference page, along with a wire size chart. The chart can be used to determine if the existing wire is adequate for the load.

    Leave a comment:


  • ksanders
    replied
    "Norton Rider" post=823527 wrote:
    The specs on that pump shows that the pressure switch is set to 75-85 psi. This is much higher than most boat and TV pumps. I would be concerned about the longevity of the plumbing system at that pressure.
    That is some serious pressure!!! I agree completely!

    Leave a comment:


  • Norton_Rider
    replied
    The specs on that pump shows that the pressure switch is set to 75-85 psi. This is much higher than most boat and RV pumps. I would be concerned about the longevity of the plumbing system at that pressure.

    Leave a comment:


  • ksanders
    replied
    Before you get unhappy about pulling bigger wire (which is pretty easy from the panel to the pump btw) look at the size of the breaker that is tripping. It could be stock and it could be something someone put there in the past (such as if a breaker failed)

    The wire going to the pump is 12 AWG I believe from memory. If that is the case you can safely go up to a 20 amp breaker.

    Leave a comment:


  • Foster
    replied
    You might want to go with the smaller pump. The average home shower is ~2.5 gal a min. My boat shower is just under 2. Your pump puts out just over 5 gal per min, enough flow for two showers.

    If you decide for the bigger breaker, you'll need to pull heavier wire. At 12 volts and the current, the undersized wire will eat up additional current. You may find the larger wire solves your problem without a breaker change.

    But do a quick check on the connections. Are they solid with a good crimp? A bad connection, with a heavy load may put the breaker over the line.

    Leave a comment:


  • jeff_perfater
    replied


    This was the pump that I bought. Came highly recommended from a boat neighbor of mine. Has a higher GPH than a couple of the others. But definitely blowing that breaker every time I use it for any kind of extended period of time... like for a shower.

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  • Uncle_Bob
    replied
    Your breaker is matched to the wire gauge so upping the breaker creates an overheated wire risk. The pump you replaced was likely closer to 2.5 amps than 10. If you want to keep 10, you might have to re-wire from the pump to the breaker panel. Have you noticed any benefit to using the bigger pump?

    Leave a comment:


  • jeff_perfater
    started a topic 4788 Fresh Water Pump Question-gctid823082

    4788 Fresh Water Pump Question-gctid823082

    I recently replaced the fresh water pump with another fresh water pump which is a 10 amp pump. Now when I use the shower within the first 15 or 20 seconds that pump trips the freshwater breaker up in the panel near the helm. Is it possible to change the breaker to a larger breaker amperage at the DC panel? Or should I approach the problem from a different way?
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