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Old 06-04-2015, 09:38 PM   #11
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Not wired backwards. Pressure from the pump is forcing water out the breather on the top of fresh water tank and not throuh the kines. The water lines put out mostly air, with some spitting of water occationally.
I'm in a remote part of Wyoming and really didn't want to haul it to the nearest Jayco repair joint . . . It'd be cheaper to buy another camper!
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Old 06-04-2015, 09:54 PM   #12
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First be sure your water system drain lines are close. If the bypass is set to winter position it doesn't matter. It just doesn't fill the HW Tank. Turn on the pump with a tap open. If after a couple minutes no pressure is built. Try a one gallon water bottle and connect it to the suction hose on the filter side of the pump. (Some system has this already installed with one valve towards the FW Tank and one valve towards this suction hose) Be sure when you use the suction hose the FW Tank valve is closed. Any time a valve is in line with the water line the valve is open. If it is cross wise on the water line it is closed. Good luck with your test!
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Old 06-04-2015, 11:53 PM   #13
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Quote:
Originally Posted by mjlaupp View Post
Pump wired backwards?
I'm leaning toward this explanation.
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Old 06-05-2015, 08:14 AM   #14
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I'm leaning toward this explanation.
or the hoses are reversed and it's trying to push into the tank.
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Old 06-05-2015, 08:40 AM   #15
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Hopefully when the problems gets resolved the OP will post the results and we can all learn from his problem to better help the next person
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Old 06-05-2015, 08:43 AM   #16
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or the hoses are reversed and it's trying to push into the tank.
I would think not, because he states that everything works OK when hooked up to city water.



The image above shows that if the pump is running backwards, it is trying to draw water from the system and pump it into the FW tank. There could be some water dripping from a faucet or two when this happens, due to pressure differences in each circuit. And the pump is trying to pressurize the FW tank, which is causing water to dribble out the overflow tubes. There is probably air escaping through the vent line to the tank fill tube, as well. If that is happening, then this is definitely the problem.

Check for air escaping from the vent line. OR, try reversing the electrical leads on the pump to see if that solves the problem.
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Old 06-05-2015, 08:55 AM   #17
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We have had this happen with our Jay Flight when one of the valves under the galley sink was in the wrong position, so blocking water from going through the pump.
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Old 06-05-2015, 10:46 AM   #18
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Just had my TT in this week to dealer for similar issue, pump runs but no water to faucets. This worked initially then gradually just went to lots of air with water then no water. Service found that there was a bad clamp that allowed air into system and eventually caused what he said was an air-lock. Replaced clamp that ended air leak and all good... Note: Service Rep could hear the air leak that I could not when the pump was running.

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Old 06-05-2015, 05:14 PM   #19
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Originally Posted by LarryJ View Post
Just had my TT in this week to dealer for similar issue, pump runs but no water to faucets. This worked initially then gradually just went to lots of air with water then no water. Service found that there was a bad clamp that allowed air into system and eventually caused what he said was an air-lock. Replaced clamp that ended air leak and all good... Note: Service Rep could hear the air leak that I could not when the pump was running.

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This gets my vote! It just sounds like air being sucked up instead of water and this seems like a logical explanation.
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Old 06-05-2015, 05:36 PM   #20
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Thanks all. But I'm mostly puzzled that the pump is creating enough pressure to let water escape from the top of the FW tank!
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