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Old 05-05-2008, 06:03 PM   #1
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The water pump does not pump water after the fresh water tank was empty or near-empty.

The pump makes a little noise but there is no water being dispensed. The noise is not near what it used to be when the pump was working. When the water pump switch is turned on at the control panel, we can hear the pump start to run, without even opening a faucet.

We think it has lost its prime. If that is the case, is there a correct way to re-prime the pump? It is a Shur-Flo 5.7 water pump.

We are fairly new to RVing and would love a non-technical solution, if possible, or is this something we should take to the dealer?
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Old 05-05-2008, 06:03 PM   #2
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The water pump does not pump water after the fresh water tank was empty or near-empty.

The pump makes a little noise but there is no water being dispensed. The noise is not near what it used to be when the pump was working. When the water pump switch is turned on at the control panel, we can hear the pump start to run, without even opening a faucet.

We think it has lost its prime. If that is the case, is there a correct way to re-prime the pump? It is a Shur-Flo 5.7 water pump.

We are fairly new to RVing and would love a non-technical solution, if possible, or is this something we should take to the dealer?
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Old 05-06-2008, 05:45 AM   #3
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Not totally sure of your question? Water pump does not work when the tank is nearly empty? That can be normal if the pickup tube is short and not sitting on the bottom of the tank.
Water pumps always cycle for a few seconds when first turned on. This pressureizes the system. Shurflow pumps are suppose to be self priming, so nothing else should need to be done. Have you checked/cleaned the filter?
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Old 05-06-2008, 05:51 AM   #4
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If it doesn't pick up a prime and start pumping after adding water to the tank, say about half full or so, look for a loose clamp or fitting on the suction side of the pump. Sometimes connecting to city water and pressurizing the plumbing, then cutting the city water off and trying the pump will get it primed.

Keep fiddling with it, it should catch and start after a few mines.
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Old 05-06-2008, 06:08 AM   #5
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Just an "off the wall" possibility....if the unit was winterized, is there a possibility that the supply valve from the tank on the suction side of the pump is still shut off? You might even find that the anti-freeze syphon line valve is still open so that the pump is just pulling air. If the pump hasn't been used since last fall, it might be worth checking.

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Old 05-06-2008, 08:03 AM   #6
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Welcome to irv2.com and the extended family of RVers! You have received nearly every possible answer to your question in the previous replies.
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Old 05-07-2008, 06:11 PM   #7
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I just had to replace my shurflo 5.7 on its second outing. it was sucking air in around the head and i couldn't see the little bit of water it was leaking due to the confined space. Look at the head real close at the seam to see if there is any sign of a leak.
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Old 05-08-2008, 04:15 PM   #8
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Went to a wonderfully accommodating NuWa dealer, Tradewinds, in Ocala, FL, and they found there was a crack in the filter housing. All fixed - like new.

They were so polite and efficient - so nice to fit us in when their schedule was full for the day (we had called the day before). We were just traveling through on our way to Titusville, so we were very pleased.

Thanks for responding.
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