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Old 11-06-2011, 07:51 PM   #1
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Join Date: Nov 2011
Posts: 10
Question Propane Crossover line malfunction

I just purchased a 2006 Flagstaff 5th Wheel model 8524 RLS and have a question about the LP crossover line from the road side tank. Does the hose have a check valve in it to keep gas from back filling from the main tank? I'm not getting gas from the road side tank with the tank open . I disconnected the line at the main regulator and no gas when tank is opened. when I disconnect the line fronm the small regulator then crack the valve open on the tank i get gas fron the regulator. Hook the line up again and turn on the tank and no gas from the other end. The main tank and regulator works fine. I did notice what looks like a small disk and a spring at the end of the hose where it connects to the main regulator. Could it be stuck or could the hose have been installed backwards? sorry for beeing so wordy but I wanted to enclude all the information I could. I'm new here and have learnd alot just from reading through the threads. Looking to learn more each time i'm in here. Thanks for any help anyone can give.

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Old 11-07-2011, 03:18 PM   #2
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Join Date: Feb 2008
Posts: 318
I had a very similar issue.
The check valve in the line would not open.
I was at a campground when this happened.
I called the dealer I bought the trailer from and the service tech helped me.
He told me to open the main valve very slowly.
When opened quickly, the pressure can cause the little check valves to stick closed. (Don't really understand that one but it seems to be acacurate)

I was very tempted to just drill that valve out. I didn't. I bought a new hose.

Hope this helps.


2009 Flagstaff 8528 RKSS
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Old 11-07-2011, 06:22 PM   #3
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Thanks for the response. I actually received a call back from the warranty/service tech fro FR today and he told me about the same thing that the check valve can get stuck. He suggested doing what you did, replace the hose. He also told me that the check valve wasn't really necessary because it is just a added safety feature which in my honest opinion would be to keep the tanks from equalizing in the event the main regulator fails. So, It's a trip to my dealer for a new hose. Thanks again for the response. I've only known about this forum for a couple of weeks but have gleaned alot of information from reading the posts.
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