| [GMCnet] LP Tank Fittngs?? [message #100295] |
Sat, 18 September 2010 19:47  |
ejuk8em
Messages: 90
Registered: July 2010
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Hey all,
We have pulled the LP tank out of our PYS (Pineapple Yellow Sequoia) in order to rebuild the cabinet area and address a floor soft spot in the extreme rear passenger corner - I've discovered that apparently several small leaks converge there - to the detriment of the plywood. At any rate, I cannot get the LP tank brass fittings free that connects the line to the shut off valve... Is there some unknown issue here? This should be about as straight forward as anything I can think of... but it has me stumped. Any suggestions? (FYI.. I've already tried swearing at it... didn't help).
Thanks,
Lyle
Lyle A. Rigdon, Retired Superintendent
'73 Pineapple Yellow Sequoia
Pawnee, IL 62558
Pawnee Pride - Live It!
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| Re: [GMCnet] LP Tank Fittngs?? [message #100347 is a reply to message #100295] |
Sun, 19 September 2010 16:01  |
kingd
Messages: 592
Registered: June 2004
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And the triva question of the day is "who knows why the POL fitting is left hand threads ?" P. S. not for the same reason "knock off" nuts are on some old time road cars.
DAVE KING
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: [GMCnet] LP Tank Fittngs?? [message #100365 is a reply to message #100347] |
Sun, 19 September 2010 17:57 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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| kingd wrote on Sun, 19 September 2010 14:01 |
And the triva question of the day is "who knows why the POL fitting is left hand threads ?" ...
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I always assumed it had something to do with making gas fittings NON-INTERCHANGEABLE with other types of fittings. It could be just to make things harder on most of us. 
Lyle,
Have you tried to "tighten" the connection? LH fittings (like the ones on older LP valves) work backwards to "normal" fittings.
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
[Updated on: Sun, 19 September 2010 17:57] Report message to a moderator |
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| Re: [GMCnet] LP Tank Fittngs?? [message #100385 is a reply to message #100300] |
Sun, 19 September 2010 19:50 |
ejuk8em
Messages: 90
Registered: July 2010
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Bob,
I wondered if that was the issue. However, before I muscled the fitting into an even worse situation/condition I thought I would ask the group. What a great resource!!
Lyle A. Rigdon, Retired Superintendent
'73 Pineapple Yellow Sequoia
Pawnee, IL 62558
Pawnee Pride - Live It!
--- On Sat, 9/18/10, Bob Cook <bcgmc@verizon.net> wrote:
From: Bob Cook <bcgmc@verizon.net>
Subject: Re: [GMCnet] LP Tank Fittngs??
To: gmclist@temp.gmcnet.org
Date: Saturday, September 18, 2010, 8:27 PM
Lyle:
Did you try turning the nut the other way? POL fittings are reverse thread.
--
Bob Cook
78 Birchaven
75 Avion (In work)
Redondo Beach, CA
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| Re: [GMCnet] LP Tank Fittngs?? [message #100390 is a reply to message #100386] |
Sun, 19 September 2010 20:22 |
GMCNUSA
Messages: 283
Registered: August 2006
Location: Indianapolis, IN
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| kingd wrote on Sun, 19 September 2010 21:02 |
The POL is the aconym for Prest-O-Lite who created the "POL" fitting style. The "new" ACME, QCC(Quick Closing Coupler) has been required on U.S.A. sold DOT tanks since year 2000. The external thread on the ACME are right hand.
http://rvbasics.com/techtips/rv-propane-tank-valves.html
So why are POL left hand. If you have oxy-acetylene welding equipment, your acetylene tank is a clue to my Trivia question.
DAVE KING
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The accidental install of a fuel source regulator and hoses on the oxygen tank would very likely cause rapid combustion of residual fuel (BOOM!!!) when high pressure oxygen is introduced into the regulator. Junk yards quite often use oxygen and propane as cutting torch fuel. Thus fuel sources had left hand threads.
Larry Dilk
Indianapolis, IN
76 Eleganza II
Patterson 455,Turbo City TBI,
Just LOVE It!
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