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Old 07-25-2018, 07:20 PM   #1
Junior Member
Join Date: Apr 2018
Location: Florida
Posts: 15
intermittent water flow when boondocking

Hi folks,

My rig:
RV: 2014 Jayco Greyhawk 31 ds
Water pump: "4008 RV by-pass pump" by Shurflo
Tankless water heater: Girard products, model gshw-1m

When dry camping and using the water pump, it works intermittently. When I turn on the pump using one of the indoor 'on' switches, water will run just fine for a few minutes or so; it will even produce hot water just fine. With no warning or sound, the water flow will quit. The pump remains on as indicated by a red lit switch, but the pump produces no noise- I can not hear it running. If I leave the pump in the 'on' position and walk away for a few minutes, and come back to the sink and try again, the tap still will not produce water. But if I turn the pump switch 'off', walk away for a few minutes, come back to the kitchen, and turn the pump back on, then open the tap, it will work fine for a few minutes. Until the whole cycle repeats. This has proven true for the kitchen sink, shower, bath sink, and toilet.

I don’t know if it matters, but I only turn the water pump on when I need it, since I am try to conserve house batteries while boondocking using a crappy old battery. I am getting new house batteries this week, so energy conservation will be less critical. Should I turn the pump on and just leave it on for the duration of the boondock?

I have read other forums and took the following actions:

I have inspected the entire area around the water pump (located in the pass-through basement storage area) and found no leaks, not even a tiny drop.

I have inspected indoor plumbing around kitchen and bath and found no leaks or concerns.

I have read other folks suggest this sort of problem may be a result of water draining back into the tank, but I do not know how to check for that.

I am living in my RV fulltime so I am not in a position to drain and dry things for a several days. So far this has just been an annoyance, not a major burden. But I would like to get it fixed. I have looked at buying a new pump, which seems very doable. But before I spend a few hundred (supplies, labor, etc), I figured I would see if y’all had other advice.

TN Jen is offline   Reply With Quote
Old 07-27-2018, 05:37 PM   #2
Senior Member
Join Date: Jun 2012
Location: West Chicago
Posts: 550
Can you bypass the water heater to see if is a bad valve leading to water heater?

I wouldn't think pump draw would be significant if left on and no leaks for it to cycle frequently.
2019 F250, gas, 4.30
2017 29RKS
wabirch is offline   Reply With Quote

water pump

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