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Old 04-02-2020, 07:14 AM   #1
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Weird Water Problem

Need some help please...

Wife and I are hiding out in our airstream during all of the fun that is parked in an airplane hangar. We have full hookups, water, electric and septic.

This morning when I got up we had what looked like a fairly significant amount of water on the concrete floor (probably not as much as it looked like). After a couple minutes of panic I figured out that the fresh water tank was overflowing out onto the ground (concrete floor).

How would that be possible? We have shore water hooked up, and have for the last couple of weeks. The other day I checked the fresh water tank and it was at about 40%. This morning it was at 100% and leaking.

Has some sort of a check valve failed?

Any help/suggestions would be appreciated.

Thanks,

-Dan
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Old 04-02-2020, 07:22 AM   #2
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There is a check valve in your water pump. It is stuck or leaking though. Basically take the front of the pump off to access it. It’s a spring loaded disc.
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Old 04-02-2020, 07:23 AM   #3
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The pump acts as a check valve so the water does not overfill the tank. You have a leak through the pump. Add a shut off tap in front of the pump or take out the pump and try to clean the seals or plug the line from the pump.
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Old 04-02-2020, 08:08 AM   #4
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No need to replace the pump here. You can get a rebuild kit and simply replace the diaphragm head. Get 2 when you order shipping in likely to be almost as much as the kit.
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Old 04-02-2020, 08:26 AM   #5
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Any chance you are running the air conditioner, and the water is from your drain hose in the wheel well?

Pat
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Old 04-02-2020, 08:39 AM   #6
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Quote:
Originally Posted by pmclemore View Post
Any chance you are running the air conditioner, and the water is from your drain hose in the wheel well?

Pat
I wish, it was 36 degrees last night, and this is WAY more water than that.

Thanks for the suggestions. I’ll see if I can order a rebuild kit (or two) today. Any suggestions on who to buy one from (if that is allowed).

Thanks,

-Dan
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Old 04-02-2020, 09:03 AM   #7
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Dan,

Posting the pump make and model info might also help with specific directions.

IF it connects with a PEX fitting and nut to the water supply to trailer you might be able to disconnect and put a 1/2" plastic pipe plug, yup right up against the PEX rubber seal IF that's how it's connected. But this is an sofa SWAG as to your system.

Gary
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Old 04-02-2020, 09:13 AM   #8
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Before going drastic...disconnect city water, use the FW tank 'til it's low, hook-up and see if it stopped.

Bob
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Old 04-02-2020, 09:15 AM   #9
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Water Pump Check Valve Failure

Before you go through the trouble of rebuilding the pump try this.

Turn off the fresh water supply to the AS. Turn the onboard water pump on and use up the water that is in the fresh water tank. The pump may clear out the check valve and perform fine. Sometimes a bit of dirt will cause the check valve to stick open allowing the onboard fresh water tank to slowly fill up.

Your check valve may indeed be bad, but this method worked for me one time on our 2017 23D. Never had another problem with it sticking. Good luck.
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Old 04-02-2020, 12:42 PM   #10
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Quote:
Originally Posted by Dweyant View Post
Need some help please...



Wife and I are hiding out in our airstream during all of the fun that is parked in an airplane hangar. We have full hookups, water, electric and septic.



This morning when I got up we had what looked like a fairly significant amount of water on the concrete floor (probably not as much as it looked like). After a couple minutes of panic I figured out that the fresh water tank was overflowing out onto the ground (concrete floor).



How would that be possible? We have shore water hooked up, and have for the last couple of weeks. The other day I checked the fresh water tank and it was at about 40%. This morning it was at 100% and leaking.



Has some sort of a check valve failed?



Any help/suggestions would be appreciated.



Thanks,



-Dan


Dan we have a 2009 classic. We have had the same problem in ours, just turn off city water and use electric pump for a few times. This resets the check valve in the system. Then go back to city water. Good as gold. If this doesn’t fix, get access to pump and tap it the check valve may be hung up. If none of this trouble shooting fixes, replace pump. We yet to replace pump due to this problem.
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Old 04-02-2020, 07:23 PM   #11
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If using the pump doesn’t clear you issue, the fresh tank just fills when you are connected to city water. You can just run off of tank and fill again for the time being if you can’t make it to a dealer or perform the repair yourself.

We had this issue when we were under warranty. JC just replaced the pump. We did as others are recommending and the pump cleared and we were fine for about a month before it full on failed.

Best of luck. Keep us up to date with what you find out.
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Old 04-04-2020, 04:09 PM   #12
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Finished up the fresh water tank and hooked ups shore water.

So far so good on the tank staying empty. However I do have a little bit of water dripping around the road side tire well. No A/C or Heat running today so it can’t be from that. Any ideas?

Thanks,

-Dan
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Old 04-04-2020, 05:57 PM   #13
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Also, might want to consider an in line water filter, after you get your problem solved, if you don't have one.
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Old 04-04-2020, 06:06 PM   #14
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Happened to me when our Classic was less than 2 month old. Was the check valve and rather than repair the pump, the dealer just put a new one in and that addressed the issue. Obviously if it hadn't been in warranty, I'd try some of the solutions others have posted to you. Replacing the pump obviously will always fix the problem but is the more expensive route.

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Old 04-05-2020, 06:05 AM   #15
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Quote:
Originally Posted by Dweyant View Post
Finished up the fresh water tank and hooked ups shore water.

So far so good on the tank staying empty. However I do have a little bit of water dripping around the road side tire well. No A/C or Heat running today so it can’t be from that. Any ideas?

Thanks,

-Dan
Around the dump valves?
Our grey tank valve flange was overtightened when installed, finally cracked two years ago.

Bob
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Old 04-05-2020, 05:19 PM   #16
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Ok, a little more info.

The leak doesn’t appear to be related to the grey water tank. I’ve had the grey water valve open all day (hooked to the septic drain) and not a drop of water on the concrete. That is running off the fresh water tank.

Last night when I tried to run off of the shore water, I was getting a very slow leak under the street side tire well.

So appears to be something related to the shore water. Any thoughts on what to look for?

Thanks,

-Dan
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Old 04-05-2020, 07:30 PM   #17
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Possible leaky low point drain valve?
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Old 04-06-2020, 04:54 AM   #18
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Can you take a picture of where it’s leaking?

It only starts when you are pressurized from city water or when you fresh tank is full or filling?
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Old 04-06-2020, 06:59 AM   #19
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I got my rebuild kits through Amazon. Search Surflo parts and look for diaphragm kit. I see it going for $28 or so. It was much less when I got it. Must be getting popular
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Old 04-06-2020, 08:31 AM   #20
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Leak

Might be the inline pressure control valve ? (Limits City Water Press.) ) On my trailer it was inline near city hookup. All I had to do was snug up fittings. Might be difficult to get to.
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