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Topic: propane tank fill connection check valve (Read 564 times) previous topic - next topic

propane tank fill connection check valve

Often when I fill the propane tank, the check valve sticks and it takes a wrap with a hammer to get it to seat.  This last time the filler person told me of a screw on fix for this condition.  There is a screw on check valve that screws onto the existing fill connection that you can fill through.  It just backs up the existing check valve.  I bought one from them, but they are also available on line.  The person that sold it to me stated that it should be considered temporary and I should fix the original when I empty the tank.  Has anyone used one of these and if so, did you leave it on permanently??  Seems to me that it could stay on permanently.  Thanks and have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: propane tank fill connection check valve

Reply #1 –
I just had the opposite problem.  I tried to fill my tank last week, but it was a no go.  The propane supplier could not fill through the valve.  I pushed on the center button and got a little gas spurt, but still no go.

I just ordered a new valve and will replace it when the tank is nearly empty. 
1998 U320 40'
2005 GMC Yukon
MC# 17609

Re: propane tank fill connection check valve

Reply #2 –
Link?
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: propane tank fill connection check valve

Reply #3 –
If a Propane Bottle will not fill, disconnect the fill line and tap the bottom on the ground, there a slide over fill valve inside that get's hung up
1988  40' Grand Villa Cat 3208t

Re: propane tank fill connection check valve

Reply #4 –
Quote from: fkjohns6083 –
Often when I fill the propane tank, the check valve sticks and it takes a wrap with a hammer to get it to seat.  This last time the filler person told me of a screw on fix for this condition.  There is a screw on check valve that screws onto the existing fill connection that you can fill through.  It just backs up the existing check valve.  I bought one from them, but they are also available on line.  The person that sold it to me stated that it should be considered temporary and I should fix the original when I empty the tank.  Has anyone used one of these and if so, did you leave it on permanently??  Seems to me that it could stay on permanently.  Thanks and have a great day  ----  Fritz
That 1-1/4" Acme thread check valve is really a double check valve and if it doesn't want to seat you need to run your tank down and replace it.  FWIW it used to be called a "Prest-o-lite" valve.

My other coach came with an obsolete auto stop valve that I replaced.

The Infamous Auto Stop Propane Fill Valve. | arts-attic.com
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: propane tank fill connection check valve

Reply #5 –
Quote from: fkjohns6083 –
Often when I fill the propane tank, the check valve sticks and it takes a wrap with a hammer to get it to seat.  This last time the filler person told me of a screw on fix for this condition.  There is a screw on check valve that screws onto the existing fill connection that you can fill through.  It just backs up the existing check valve.  I bought one from them, but they are also available on line.  The person that sold it to me stated that it should be considered temporary and I should fix the original when I empty the tank.  Has anyone used one of these and if so, did you leave it on permanently??  Seems to me that it could stay on permanently.  Thanks and have a great day  ----  Fritz
That being said, some propane stations, those who cater to older propane systems routinely use an external check valve, and if your valve doesn't hold, you just bought their check valve.

MARSHALL FILL CHECK VALVE ADAPTER EXTENSION ACME LEAK STOP SEAL 1-3/4",...

NEW SHERWOOD USA DOUBLE CHECK FILL VALVE 1-1/4" NPT 1-3/4" ACME PROPANE TANK...
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: propane tank fill connection check valve

Reply #7 –
Our coach has a very large capacity propane tank with a liquid valve that was originally used for propane generators. This is in addition to the normal vapor valve. With a diesel gen, our liquid valve is caped off.

No reason to run this style propane tank down to change fill valve because a propane dealer can quickly empty tank into another empty tank using the liquid valve.

In fact, a dealer did just that and even gave us credit for all the propane transferred.

Re: propane tank fill connection check valve

Reply #8 –
Quote from: Barry & Cindy –
Our coach has a very large capacity propane tank with a liquid valve that was originally used for propane generators. This is in addition to the normal vapor valve. With a diesel gen, our liquid valve is caped off.

No reason to run this style propane tank down to change fill valve because a propane dealer can quickly empty tank into another empty tank using the liquid valve.

In fact, a dealer did just that and even gave us credit for all the propane transferred.
I *thought* my Onan was running on liquid propane, bet when I looked closer it runs on the vapor.  I was trying to run my tank empty to check on its volume, because 174# looked like a type, but as close as I was to the end, yup, it takes 40+ gallons to fill.

Here in southern Georgia the propane dealers seem to aim their business model towards commercial customers.  I had my last tank pumped out and the fees to do so equaled the price for the propane.

NEW SHERWOOD USA DOUBLE CHECK FILL VALVE 1-1/4" NPT 1-3/4" ACME PROPANE TANK...
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: propane tank fill connection check valve

Reply #9 –
I have had problems with trying to fill the propane tank at some of those small store type fill stations. They seem to have small low volume pumps, most likely to keep inexperienced operators from getting into trouble. Never had an issue at a real propane dealer off a truck or bulk tank.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country