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Old 08-10-2015, 10:47 AM   #1
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Propane discharge

I picked up my new 2015 Greyhawk in MI on Wed. On Sunday we were outside Denver when a extremely loud whooshing sound started and my wife said she smelled propane. I pulled over and shut off the propane, smell dissipated pretty quickly, the sound had stopped by the time I got the rv stopped. Today (Monday) I do a thorough inspection of the propane lines and fittings - I see nothing obviously broken or uncoupled. Could the apparent discharge been an overpressure situation some how and the sound was just coming from the relief valve? Any help would be appreciated. Wife is freaking out and a service appointment is 2 weeks out.
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Old 08-10-2015, 10:56 AM   #2
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Can you switch to the 2nd tank and check for major leak?
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Old 08-10-2015, 11:05 AM   #3
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Originally Posted by mtnrv View Post
I picked up my new 2015 Greyhawk in MI on Wed. On Sunday we were outside Denver when a extremely loud whooshing sound started and my wife said she smelled propane. I pulled over and shut off the propane, smell dissipated pretty quickly, the sound had stopped by the time I got the rv stopped. Today (Monday) I do a thorough inspection of the propane lines and fittings - I see nothing obviously broken or uncoupled. Could the apparent discharge been an overpressure situation some how and the sound was just coming from the relief valve? Any help would be appreciated. Wife is freaking out and a service appointment is 2 weeks out.

Does it have a pressure relief valve? I've never know relief valves to be put on propane tanks. Just wonderin...
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Old 08-10-2015, 11:11 AM   #4
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I don't think there's relief valve in a propane system. There is a pop-off plug on the tank valve but it's a one shot deal. Did one or both tanks empty?
I might suspect a broken or damaged gas line. If you have a hole in the system the automatic shut-off in the pig-tail connector will probably prevent much gas to flow, it's designed to shut the gas off at the tank connection if a high flow rate occurs.
Sounds like the propane detector did not go off, I'd check that too.
If you do any troubleshooting open the windows first and make sure nothing else is running (lights, fans, misc electric motors...-potential sources of ignition)
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Old 08-10-2015, 11:17 AM   #5
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No 2nd tank on this model. I have opened the tank back up and will see if I have a noticeable leak or odor.
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Old 08-10-2015, 11:21 AM   #6
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Well, maybe it's a plug not a valve. It's only marked "relief" so I assumed it was a valve like you'd find in a bicycle tire.
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Old 08-10-2015, 11:40 AM   #7
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Anything left in the tank?
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Old 08-10-2015, 11:52 AM   #8
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Yea...still a bit over 1/2 full.

Side note - I see you are in Akron, we were just passing through there visiting wife's dad in Canton. Lots going on this past weekend in that area with the golf tourney and hall of fame game.
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Old 08-10-2015, 12:40 PM   #9
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Will any of the gas appliances work, like the stove? If not it would raise my suspicion about a leak in the flexible gas line and the shut-off valve in the pig-tail has closed.
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Old 08-10-2015, 02:52 PM   #10
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I see some are asking you about the pigtail, which I believe is only present on towed RVs with changeable DOT propane tanks. Our Class C units have an onboard ASME propane tank, and I believe they do have a spring-loaded relief valve that will reset once it has "popped" and relieved the excess pressure.

It is possible the tank was very full in a cooler environment and once in a hotter environment it caused the liquid propane in the tank to gas off without enough available vapor space to accommodate it. Hence, a relief valve event.

You are right about Akron, we had the Bridgestone Invitational golf event at the famour Firestone Country Club here in Akron; the Pro Football Hall of Fame Induction Ceremony in Canton just to our south, and the Twinsburg "Twins Days" going on to our north. All draw people from many other areas to northeast Ohio.
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