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Old 10-01-2016, 10:38 AM   #11
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Yes, the input port for shore water will have a check valve at that port but check valves for the AF/Holding tank inputs I believe are not the norm. That is why there are numerous questions on this forum as to "why is my holding tank filling up when connected to shore water". The install of check valves at those sources would be the exception not the typical (norm) and this is the first I have heard of such a set up. Now, I don't keep my ears tuned in to all issues on this forum and maybe I just missed this one.
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Old 10-01-2016, 10:46 AM   #12
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Yes, the input port for shore water will have a check valve at that port but check valves for the AF/Holding tank inputs I believe are not the norm. That is why there are numerous questions on this forum as to "why is my holding tank filling up when connected to shore water". The install of check valves at those sources would be the exception not the typical (norm) and this is the first I have heard of such a set up. Now, I don't keep my ears tuned in to all issues on this forum and maybe I just missed this one.
Not sure why you're bringing up the FW tank. That can fill up simply because the water pump check valve is leaking and would have nothing to do with whether the the AF port had a check valve or not.

I'm pretty sure my Roo had an AF port check valve. Guess I'll be checking my Mini Lite AF port this week to see if it has a check valve!

But if the city water and AF ports were different, I'd have expected to see a lot more "why is my city water port leaking" issues that were NOT solved by re-seating the check valve than we see on this forum. We'd be seeing people complaining that they HAD no check valve. I'm basing this on my expectation that the manufacturer would install the wrong port in the wrong place. And I'm basing that expectation on all the other mistakes they seem to make; I can't believe they wouldn't mess this up unless they couldn't mess it up.
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Old 10-01-2016, 11:01 AM   #13
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The antifreeze input port has a manual positive shut off valve. Check to see that it is completely closed. If it is open just a little, you water pump will not operate properly when using the fresh water tank and if the pump check valve is not seated well can leak water when on city water.
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Old 10-01-2016, 07:46 PM   #14
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Rockfordroo... I was agreeing to bubbles and questioning why you mentioned about an ANTIFREEZE port check valve. I've never had a unit that has had one.

Yes, we all understand why the city water port has to have a check valve and the thinking that they buy a bunch of them all the same has merit but of the three exactly like ports on my Flagstaff, only the city water port has a check valve. Neither the antifreeze port or the black tank flush port does.

Also, I've seen several posts on here of folks complaining about city water back flowing out the antifreeze port when they have the antifreeze/fresh water valve in the improper position so I believe check valves in the antifreeze ports are in the minority.
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Old 10-01-2016, 11:11 PM   #15
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Rockfordroo... I was agreeing to bubbles and questioning why you mentioned about an ANTIFREEZE port check valve. I've never had a unit that has had one.

Yes, we all understand why the city water port has to have a check valve and the thinking that they buy a bunch of them all the same has merit but of the three exactly like ports on my Flagstaff, only the city water port has a check valve. Neither the antifreeze port or the black tank flush port does.

Also, I've seen several posts on here of folks complaining about city water back flowing out the antifreeze port when they have the antifreeze/fresh water valve in the improper position so I believe check valves in the antifreeze ports are in the minority.
Like I said, I'm going to have to check mine. You may very well be correct.
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Old 10-02-2016, 09:20 PM   #16
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Update.

Changed campground today and started having water out of the AF inlet again. I removed the screen and do not see any reset device in the AF inlet. I hooked up city water to the AF inlet and turned it on for about 2 seconds and then back off and hooked the hose back up to city water inlet and the leaking stopped.
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Old 10-02-2016, 10:11 PM   #17
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Update.

Changed campground today and started having water out of the AF inlet again. I removed the screen and do not see any reset device in the AF inlet. I hooked up city water to the AF inlet and turned it on for about 2 seconds and then back off and hooked the hose back up to city water inlet and the leaking stopped.
Just be careful hooking city water to the antifreeze inlet. That is the suction side (low pressure) and depending on water pressure, could cause problems. Are you using a regulator or checking campground pressures when connecting your water supply
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Old 10-02-2016, 10:39 PM   #18
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Yes, I am using a 40 lb regulator.

Gonna see if I can figure out how to do a pump reset now.
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Old 10-02-2016, 11:02 PM   #19
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Sounds like it worked out for you to reset the FW pumps check valve.

I may be putting words in his mouth, but I think 5picker's concern is that you're putting full city water pressure on the suction of the FW pump. PROBABLY won't hurt it, since it ultimately puts out a similar pressure, but who knows?
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Old 10-03-2016, 08:33 AM   #20
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Sounds like it worked out for you to reset the FW pumps check valve.

I may be putting words in his mouth, but I think 5picker's concern is that you're putting full city water pressure on the suction of the FW pump. PROBABLY won't hurt it, since it ultimately puts out a similar pressure, but who knows?
Not putting words in my mouth... that was my concern.
I would hope no problem comes of it and that's one of the reasons I questioned the use of a regulator.

Not so concerned about the pump but remember, most of these systems have a suction strainer on the inlet side of the pump. They are NOT designed for pressure. I could envision hooking city water with the possibility of 80 psi to the antifreeze inlet as a way to create problems.
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