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| Re: [GMCnet] Propane shut off valve [message #170546 is a reply to message #170544] |
Tue, 22 May 2012 14:00   |
bumpersticker
Messages: 60
Registered: February 2004
Location: Redondo Beach, CA
Karma: 0
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Nancy:
Some propane valves will leak at the stem if they not all the way on or all the way off. If they are in between most valves will leak. So check it out to be sure. Changing a valve is a big hassle. Good luck!
Bob Cook
78 Birchaven
75 Avion (In work)
Redondo Beach, CA
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| Re: [GMCnet] Propane shut off valve [message #170554 is a reply to message #170546] |
Tue, 22 May 2012 15:48 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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crack open the valve on a windy day with the hose disconnected...
outside of course 
And while your at it, throw a few 10's and 20s in the air....
I had to do that 2x with my SOB. level sensor was leaking
first time I took it to a specialty RV shop that was 'experienced', they charged me labor, emptied my tank, charged me to refill it.
Got home, still leaking.
So I dumped it again, pulled the level sensor, re-sealed it and refilled it...no more leak
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Propane shut off valve [message #170559 is a reply to message #170546] |
Tue, 22 May 2012 16:40 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| bumpersticker wrote on Tue, 22 May 2012 12:00 |
Some propane valves will leak at the stem if they not all the way on or all the way off. If they are in between most valves will leak. So check it out to be sure. ...
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Actually, they are ALL designed that way.
The design is to seal when closed and when fully open. If the stem does not leak when half open, you are lucky. (Most NEW valves DO hold at the stem... while fairly new.)
That said, I replaced one a few years ago. It was leaking a bit more than what would be expected during the transition from closed to full open. (The propane guy agreed... and he did NOT want to do the job.)
Yes, it did have to be emptied. Best if you can use it, rather than just vent it to atmosphere. Got a hose that will reach the BBQ? ....Sadly it is most likely not worth the hassle.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] Propane shut off valve [message #170571 is a reply to message #170544] |
Tue, 22 May 2012 19:14 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| nancy mercier wrote on Tue, 22 May 2012 12:45 |
We need the propane shut off valve replaced. how do we empty the tank?
Thanks for any advice on this.
Nancy M
77 kingsley
Tucson, AZ
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Nancy. I would loosen a connection either in front or behind the regulator and then slowly open the main valve and let it vent to the atmosphere. I suspect some of the GMC do gooders in Tucson may object but propane is relatively harmless to the environment. Just make sure all pilot lights are off.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Propane shut off valve [message #170584 is a reply to message #170544] |
Tue, 22 May 2012 21:14 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| nancy mercier wrote on Tue, 22 May 2012 14:45 |
We need the propane shut off valve replaced. how do we empty the tank?
Thanks for any advice on this.
Nancy M
77 kingsley
Tucson, AZ
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Nancy,
How full is the tank?
Dumping it to air may be the easiest.
Call around to the propane service places and see if one of them can empty the tank. Only one in a dozen can.
Failing that, find all your friends that have gas grills that use tanks. Hope enough of them have tanks that are down.
Get the POL fitting out of your regulator and one from a friend. POL really doesn't mean Put On Left, it is left over from Prest-O-Lite, the company that made acetylene headlights for cars.
Note: The cut around the hex indicates that it is a LEFT HAND THREAD. The pipe thread into the regulator is a normal 1/4 NPT.
The vapor pressure of liquid propane is very near the tank temperature in Degrees F. (70psi here, 100 there - still no bid shake). Still, be careful, the liquid can cause frost bite. (And - hopefully - it is flammable)
To do this yourself... .
With the two POL fittings in hand.
Get 2ea 1/4 NPT Female to 1/4 tube adapters and about 5' of tube. Almost anything will do to connect the two ends.
Build a connector with 2 POLs - one on each end.
Get a tub to put on the ground next to the coach that is big enough for the BBQ bottle.
Put ice in the tub around the BBQ bottle.
Open both valves.
Repeat with different BBQ bottles until one doesn't get heavier. This will be a slow process and the coach tank may frost (not in AZ, but here it would). A fan will help the coach tank warm and empty faster. Leave the coach tank valve just cracked.
Now, go get your new valve and BIG Mama Wrench. Put teflon pipe thread sealant on the new valve and have it handy and clean. It is easier to hold the tank if it is still bolted soundly to the coach frame. Unscrew the old valve, and screw the new one in. Do this with some dispatch (sort of fast). You don't want air in the tank or you gas appliances will give you fits until you run it out. Again, this doesn't have to be like wrestling a mountain gorilla because the tank pressure just isn't that high.
Did I say BTDT * a few? If you were in MI, I could lend you all the parts and tools (except the ice).
Sorry, This got held up by a phone call, dinner another phone and a dog that would come when called.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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