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Old 09-30-2016, 06:53 PM   #1
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Water coming out of anti freeze inlet

A little weird,

We have had no problems this season but this time hooked to site water there is water coming out of anti freeze inlet. Not all of the water but some. I was able to stop it by capping to inlet but after a couple of hours I started seeing water inside. I believe I caught it in time that it didn't do any damage inside. I took the cap back off and it was under considerable pressure. Then when I turned the water source back on it no longer leaked.

I am good for now since it's not leaking but still concerned on what's causing it. I'm gonna take a wild guess that it has something to do with the 12 volt water pump.

As a sidenote, I no longer have the filter hooked up. I now filter my water outside. But, it has been working fine for the last two years.

Suggestions?
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Old 09-30-2016, 06:56 PM   #2
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I forgot to mention that I never use the freshwater tank.
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Old 09-30-2016, 07:19 PM   #3
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There is a backflow preventer (check valve) in the winterizing port. Sometimes the disk gets dislodged and water when pressurized can come out the port. Just poke something small in the port and you'll reseat the check valve. It's spring loaded. Never use the freshwater tank? You must never dry camp. Fresh water tank filled maybe 1/3 is pretty handy on the road for stops on the way to your destination ... you don't have to drink from it.
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Old 09-30-2016, 09:18 PM   #4
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I see a screen in the inlet port. Assume the disc is behind this screen?

Haven't had a place or need to boondock yet. Momma likes state parks a lot.

Maybe someday.
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Old 09-30-2016, 09:40 PM   #5
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You should also have a valve between the water pump and the AF inlet, and another between the water pump and the FW tank. Recently they've started replacing these two valves with single 3-way valve.

So if there's water coming out of your AF inlet, you have 2 problems: 1. The check valve in the water pump is leaking backwards and 2. the check valve at the AF inlet connection (as you've already been told) is leaking. Also, you've got the valves lined up so the AF connection is tied to the water pump. If you swap your valves, you'll have it lined up to your FW tank, and then the water will leak back into your FW tank.

See attached pic, it may help you.
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File Type: pdf RV Plumbing pic.pdf (180.9 KB, 97 views)
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Old 09-30-2016, 10:14 PM   #6
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Thx folks.

Dark now so this will give me something to check tomorrow.
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Old 09-30-2016, 10:41 PM   #7
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If you put some water in your FW tank, you can then turn off the city water and pump the FW tank water through the system. This usually will re-seat the water pump's check valve and you'll be good to go.

If you have a 2-3 ft piece of hose, you could also attach it to your AF inlet, put the other end in a water source (e.g., a jug or tub) and pump that through. This would put water through both the AF inlet check valve and the water pump check valve and would probably re-seat them both.

Good luck.
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Old 10-01-2016, 07:50 AM   #8
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Just curious. If the antifreeze, holding tank, shore water inputs are selected via manual valves what are the check valves in these lines for. It's just one or the other. The only check valve I know of is internal to the water pump.
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Old 10-01-2016, 08:01 AM   #9
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Quote:
Originally Posted by bubbles View Post
Just curious. If the antifreeze, holding tank, shore water inputs are selected via manual valves what are the check valves in these lines for. It's just one or the other. The only check valve I know of is internal to the water pump.
I'm wondering that too?
None of my units with winterizing ports ever had check valves in them, including our current Flagstaff 8529IKBS.

Once you get past the little screen on the port, it is a straight shot to the pump. (with the exception of the selection valve for the water tank/antifreeze port)
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Old 10-01-2016, 09:15 AM   #10
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I'm wondering that too?
None of my units with winterizing ports ever had check valves in them, including our current Flagstaff 8529IKBS.

Once you get past the little screen on the port, it is a straight shot to the pump. (with the exception of the selection valve for the water tank/antifreeze port)
Your city water port HAS to have a check valve, because if it didn't, your water pump would pump your FW tank right out of the port. (Otherwise you'd only be counting on the "cleanliness plug" to keep the water in.) If it doesn't have a check valve, it would need a real valve that you would have to close before using your water pump. I've never heard of any TT having that, but I guess it's possible.

The AF port doesn't NEED a check valve, but I believe most AF ports have them simply because they buy a bunch of ports and install them. Easier to buy just the one kind with check valves and not buy two different types and then make a mistake and install the wrong port in the wrong place.
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