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Old 01-14-2019, 02:25 PM   #1
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Water leaking

There is water leaking out of the back of the trailer. It is a blue plastic rigid hose with a connection on the end of it. Is this the drain for the fresh water tank? There is another hose back there as well and I think that one is the Overflow hose for the tank. No water dripping out of that one. Water was dripping out of this blue hose and I think that the check valve has gone bad on the water pump and therefore is water backing into that tank. You turn off city water and it stops dripping. It hasn't filled up the tank cuz it still reads empty on the display. So I think that the drain valve on the tank is open. I never use the fresh water tank in this RV I'm always hooked up to city water. So I do believe there's water flowing back there to the tank. Is it better to replace the check valve on the water pump or just put in a whole new water pump? Appreciate anything you can help me with. This is our first long-term RVing Adventure. We are going to be gone from home for three months and thousands of miles away.
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Old 01-14-2019, 03:12 PM   #2
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There is water leaking out of the back of the trailer. It is a blue plastic rigid hose with a connection on the end of it. Is this the drain for the fresh water tank? There is another hose back there as well and I think that one is the Overflow hose for the tank. No water dripping out of that one. Water was dripping out of this blue hose and I think that the check valve has gone bad on the water pump and therefore is water backing into that tank. You turn off city water and it stops dripping. It hasn't filled up the tank cuz it still reads empty on the display. So I think that the drain valve on the tank is open. I never use the fresh water tank in this RV I'm always hooked up to city water. So I do believe there's water flowing back there to the tank. Is it better to replace the check valve on the water pump or just put in a whole new water pump? Appreciate anything you can help me with. This is our first long-term RVing Adventure. We are going to be gone from home for three months and thousands of miles away.

There are too many unanswered questions above for any of us to give any really reliable assistance. Since we have no idea what make/model RV you have and we don't know which valves may be open or closed or what they go to & we have no idea of the floorplan to be able to surmise what plumbing may be there. Pictures "might" help depending on what they show but, someone might recognize something.
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Old 01-14-2019, 03:43 PM   #3
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It could be a low point drain. If there's a cap or a valve on it, it must be leaking. Turning off city water will allow the pressure to drop to zero and the leak will stop. But as rracer5 says, it's hard to tell without more information.

Most rigs have 2 low point drains, one for hot and one for cold. But some smaller rigs only have one drain.

I've attached a "generic" RV plumbing pic that may help you somewhat.

I don't think your check valve is leaking or the fresh water tank would be full and the overflow would be overflowing.

UPDATE: I see in your profile that you have a 2012 Wildcat 5ver. If it has a "docking station," the plumbing pic may be significantly different for city water, filling FW tank etc, as some of these docking stations have everything valved together. You probably don't have a FW tank fill, per se, you fill from the city water connection.
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Old 01-14-2019, 05:08 PM   #4
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Thanks for getting back to me. There is a water fill spot on the driver side in the back you take the cap off stick hose in there and that's what you use to fill the fresh water tank. The low Point drains there's only two and they're located on the passenger side right next to the door going into the unit. So low Point drains are on the right side and there's a hot and cold there. There is a fill port for water to put into the fresh water tank. I hope that answers the questions that you guys have
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Old 01-14-2019, 07:32 PM   #5
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Your pic looks like one of my low point drains, with the cap missing.
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Old 01-16-2019, 04:05 PM   #6
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Have it figured out. That is low point drain for fresh water tank. When I put cap on it. Freshwater tank started to fill. So check valve on water pump not working. So will be putting in an inline check valve.
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Old 01-16-2019, 04:35 PM   #7
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Originally Posted by dlewand53 View Post
Have it figured out. That is low point drain for fresh water tank. When I put cap on it. Freshwater tank started to fill. So check valve on water pump not working. So will be putting in an inline check valve.
Are you using a pressure regulator when connected to city water?
Often times high pressure will 'overcome' the pump's internal check valve.
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Old 01-16-2019, 04:49 PM   #8
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Yep. Have pressure regulator. Dial kind. Set to 40 psi.
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Old 01-16-2019, 05:09 PM   #9
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Your check valve is not working for a reason... something has it open. Shut off city water at intake. put water in fresh water tank. Run Fresh water motor and run some water through it for a while. This may/should push what ever debris that is in the check valve at the water motor. No need to add something if you do not need to.
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Old 01-16-2019, 05:51 PM   #10
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Thanks. I will try it
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