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Old 07-06-2016, 10:14 AM   #1
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2015 27.5RLTS black water rinse problem.

I'm pretty sure that the culprit is the one way valve that's causing my black water rinse to not accept any water. The problem is that I can't find it! Does anyone know where it is on the 27.5rlts? Also, shouldn't there be a screen on the hose connection? Mine does not. The dealer said it was working when I brought it in but as soon as I tried to rinse the tank it wouldn't accept any water. I even tried blowing into it and couldn't even blow air into it (with a different hose of course). I'm going to the beach next week and plan on troubleshooting it there. If anyone knows where this valve is it would be a big help!

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Old 07-11-2016, 06:22 AM   #2
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Really? Nobody knows where this valve is?
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Old 07-11-2016, 07:16 AM   #3
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I don't recall an accessible valve for the black tank rinse inlet.
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Old 07-11-2016, 11:14 AM   #4
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While I don't know nor did I stay at a holiday inn last night I would suspect that the one way valve, if there is one, would be at one end or the other of the rinse line. It could be part of the fitting that you attach your pressurized water hose to though it would be on the other side of the wall or at the tank inlet for the sprayer. Neither one is going to be easy to get too. On my unit a 27.5 rlts I can remove the panel in the storage area and see the backside of the fittings for the black tank rinse, city water inlet, fw tank fill, outside shower valves etc as well as a lot of wiring and other stuff. However I was looking at it to see how hard it might be to change the valves/connections out to brass/metal instead of plastic. I was not looking for anything like that just looking at potential access. Again I am guessing but it would seem to me that either end of the line would the place to put it. A call to Jayco might be your best bet.
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Old 07-11-2016, 11:22 AM   #5
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Thanks, Barryg.
Yeah, I've looked behind that panel and my black water inlet line comes in there, then turns and goes up through the floor. I guess I'll have to trace it behind the kitchen sink back next to the water heater. That's my next step.
I'll try calling Jayco tomorrow.
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Old 07-11-2016, 04:00 PM   #6
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What you are looking for is called the vacuum breaker check valve and it should look like this: https://www.amazon.com/JR-Products-5...+breaker+valve
It is often under a sink. Mine is located in an outside storage compartment where the black water tank rinse enters my trailer. It may be broken or installed backwards.
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Old 07-11-2016, 04:30 PM   #7
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Does it look like this?


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Old 07-11-2016, 04:53 PM   #8
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Yes! Except that my black flush inlet does not have a screen over it!
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