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Old 11-19-2013, 08:56 PM   #11
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The cold water feed to the water heater has an anti back flow valve to prevent hot water from flowing back into the cold water supply line. However, the siphon valve can get blocked partially open by calcium particles or other build up. When that valve remains partially open warm water can back flow into the cold water system, especially when only cold water is running, such as when a toilet is flushed, or brushing teeth in the bathroom sink. I think that solves the mystery of how anode particles could get into the cold water lines. The cold water feed line and anti siphon valve are attached near the bottom of the water heater, just where the particles collect. The particles are much less likely to enter the hot water lines because they exit near the top of the tank.
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Old 11-20-2013, 12:40 PM   #12
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Noticed that someone posted plastic particles from the holes made in the fresh water tank? There's a strainer prior to the pump that should catch all of that unless the strainer has been removed. I did find a few there once the tank was close to empty. As small as they were they might even float, but didn't think to check that after throwing them away. After that the whole house filter would catch the remaining particles.
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Old 11-22-2013, 07:02 PM   #13
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I have found two sources for the particles......hot water tank not being completely cleaned out and a gradual buildup inside the water lines. I live in the SW so often times we will get the gradual buildup in the lines from the high mineral content of the water. And a filter will not stop this from happening!
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Old 11-22-2013, 08:21 PM   #14
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Are we the only ones who have had this happen within weeks of purchase (new 2012 bought aug 2011, clogged by late sept 2011)?

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Old 11-22-2013, 08:25 PM   #15
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Are we the only ones who have had this happen within weeks of purchase (new 2012 bought aug 2011, clogged by late sept 2011)?

ab&jb
Two brand new forest river products in 8 years and not once have I had this issue.

Albeit one was a flagstaff and one a sabre.
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Old 11-30-2013, 05:24 PM   #16
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BillMFI, thanks for that info. A year or so I reported the debris from the hot water tank clogging my toilet water input, and was told that the hot water tank did not connect to the toilet. I knew that, but I also knew the debris was from the tank (I later replaced the anode and flushed the tank), but didn't know how it got there. The water was also warm.

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Old 11-30-2013, 05:43 PM   #17
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BillMFI, thanks for that info. A year or so I reported the debris from the hot water tank clogging my toilet water input, and was told that the hot water tank did not connect to the toilet. I knew that, but I also knew the debris was from the tank (I later replaced the anode and flushed the tank), but didn't know how it got there. The water was also warm.

Thanks, Forrest
I learned all about the anti back flow valve the hard way in a 5ver I used to own. I pulled it and cleaned it out but put it back in backwards. No water for the water heater! haha
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Old 12-29-2013, 08:13 AM   #18
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Thanks much for this info. Got in late last night after a 500 mile drive & the toilet had no water. Just finished taking the water line loose at the base, used q-tips to clean out the line & now works great. This forum has really helped me over the last 2 years. Keep them coming.
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Old 12-29-2013, 10:04 AM   #19
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I started another thread on this a while back and I am having the same issue. I am not sure what to sediment is.

The first 3 camping trips this has happened. 2 city water trips and one dry camping trip. I have ruled out that it is coming from the city water, plus I have a filter on my pressure regulator. It clogged the faucets, shower and the last time my toilet. Faucets no big deal but the toilet was a bitch to try and fix.

I sure wish I knew how to stop this from happening.
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Old 12-31-2013, 11:01 AM   #20
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Various forms of this complaint go back to early 2011. Seems to be a very common problem on several Forest River products whether it be a pull behind or motor home. Also doesn't seem to be a toilet brand issue either as it is common on Dometic, Aqua Magic and others. I have read many of the responses from the various threads and the one that makes the "Most" sense to me is from BillMFI and the anti back flow valve getting stuck partially open from water heater tank sediment. What this all has taught me is to get a new anode rod this spring and to change it every year. Along with that, flush out the water heater at least once a season. Hopefully this will cure the problem for me as it seems to work for many that have experienced this same P.I.T.A. issue.
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