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Old 06-22-2015, 04:17 PM   #11
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Mine worked flawlessly until I was on my home from Virginia and at a potty stop left the pump on. Apparently with it bouncing around and not having the fresh tank full it ran for 1/2 of our 5 hour trip. Now it does the burp thing every minute if we turn it on. Works fine for pressure, just can't leave it on. Going to take it apart as soon as I get done with the tires and axles. Keep you posted on what I find.
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Old 06-22-2015, 04:25 PM   #12
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Quote:
Originally Posted by MightyMike View Post
Mine worked flawlessly until I was on my home from Virginia and at a potty stop left the pump on. Apparently with it bouncing around and not having the fresh tank full it ran for 1/2 of our 5 hour trip. Now it does the burp thing every minute if we turn it on. Works fine for pressure, just can't leave it on. Going to take it apart as soon as I get done with the tires and axles. Keep you posted on what I find.
If it ran with no water in the tank and has ran "on air" for that period of time it may have cavitated the pump to the point that it is now leaking by through itself. Hope this is not the case but have seen this many times. Cheers
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Old 06-23-2015, 09:21 AM   #13
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Pump cycles on every two minutes

The pump establishes pressure and holds pressure in the system. The pump itself is a backflow valve. Or should I say anti backflow valve. It sounds like you're a grain of sand in one of the diaphragms and the pump isn't holding pressure. it will only take a small dripping faucet somewhere like everyone has mentioned OR IF NOTHING IS LEAKING OUT, you are simply leaking pressure in the pump.
Suggest you check for leaks if none found, then remove the pump take it apart carefully and clean the sand out of it. Then before you remount the pump you should put a line filter on the intake side. Or do as I did panic and buy a new pump. Then later when you learn how to take a pump apart and clean the sand out of yours, you will have a nice spare pump to carry around with you.
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Old 06-23-2015, 09:35 AM   #14
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"Tom48"...
You are not alone...
we were packing up our 5th wheel getting ready to head out when I noticed the pump was occasionally cycling , it was the check valve.
The way I confirmed it was when I connected the city water I could hear a slight trickle of water going into the water tank.
I panicked and bought a new pump and now have a rebuilt spare.


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Old 06-23-2015, 10:23 AM   #15
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On mine the city water ck valve leaks when using water pump tried all except replacing. Went to Lowe's and got a plastic threaded cap that fits the city water intake. Doesn't leak now.
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Old 06-23-2015, 01:51 PM   #16
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You have a leak somewhere.

Your water system is losing pressure, then the pump kicks back on to build up the pressure again.

I assume you've looked around for water; inside, outside, under. Look at the water heater, both outside and inside. Look carefully at the shower, toilet, and all the faucets.

If you don't see any water anywhere, then the only thing left is the pump itself, It could be leaking internally and loosing pressure.
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Old 06-24-2015, 07:11 AM   #17
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I agree with all here,,, small leak or air in the system !!!
Good luck tracing all the water lines !!!
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Old 06-24-2015, 07:58 AM   #18
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If your pump is back leaking into the fresh water tank due to a bad water pump check valve (a rubber disk located at the center of Part #2 in the diagram and not shown for clarity), you can save your trip with a stop at Lowes or any hardware store.

Pick up an inline check valve and install it on the water pump (whichever direction the flow is based on the fitting's threads). You may need a union (F-F) to match it up in the right direction. You want the water to only flow from the tank to the camper; not the other direction.


When you get home, connect to a city water source and try to back flush the pump to clear it; if that fails to fix it, you can repair the valve body or replace the pump.
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Old 06-28-2015, 12:20 PM   #19
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Put a water pressure gauge in line to check for leak
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Old 07-01-2015, 01:53 AM   #20
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Mine cycles often as well, but it can sit for hours with it off and when you turn on the sink, water flows until pressure is gone. This is from the bathroom sink which is the highest point of the water system. so, this talk has me wondering: If there was a leak, would not all pressure be lost over time? How do you find a leak behind all of the panels and under the floor to the various appliances? Over time, especially at a camp site or several weeks and camp sites, would water finally drip onto to the pad due to too much water leaking? Any feed back would be appreciated, thanks.
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