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SlowBro's avatar
SlowBro
Explorer III
Mar 13, 2015

Water pump slows to a trickle

My water pump is pressurizing very slowly; Aside from the pump strainer, what else can I check?

I filled the fresh tank to do the bleach sterilization and draining it through the faucets took hours. (In fact, if the fresh gauge can be trusted, there is still some water in the tank.) If I have all of the faucets off and turn on the pump, I can hear it bring the system up to pressure, and that takes about 30 seconds. Then if I open a faucet I get a nice blast of water for about 10 seconds and then it slows to a trickle. The pump runs while putting out that trickle. It doesn't matter which faucet I use, bath sink or shower or kitchen, they all do the same.

The pump sounds fine; I don't have a lot of real RV experience so I'm mentally comparing it to my grandparent's Class C 25 years ago and it sounds fine. The mechanic, who seems to be trustworthy, briefly checked the pressure last week with a few gallons in the tank. I asked if he ran it long and he said no. He might not have had it on long enough to give it a good test.

I saw no valve handles underneath such as a city/fresh valve, nor is there any such reference in the manual.

Aside from the pump strainer, what else should I look at?
  • Check the bowl the strainer sits in. I had a similar problem with mine. Couldn't get pressure with any sink valve open and took a long time charging to pressure. The bowl turned out to be cracked and it was sucking air into the lines instead of water from the tank. I took the strainer out a couple times thinking I had sediment clogging it up. I sometimes fill from a creek while dry camping for extended periods. Finally noticed the crack at the bottom of the bowl while wiping it out. Glued it back together with some JB Weld and not had another problem. Just got to remember to take the bowl off while winterizing. i figure the crack was from water freezing.

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