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09-08-2013, 07:58 PM
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#1
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Junior Member
Join Date: Mar 2013
Posts: 15
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Lesson learned about propane tanks
Maybe I can save someone a few headaches by what I learned recently.
I removed my 20 lb.propane tank to weigh it because I had no idea how much was left in the tank. After weighing the tank I put it back on the trailer as it had a fair amount still in it. I hooked up the hose, turned on the valve, and tried lighting the stove to purge the gas line of air. It would burn nicely for a few seconds and go out. I tried and tried to no avail. I know that the hose from the tank to the regulator has an "excess flow shut off valve" in case of a major leak. I removed the hose again and inspected it, tried shaking it thinking maybe the valve was stuck. Hooked it back up and tried many times to light the stove. Still no light.
Later in the day I got on the computer and Googled "excess flow valve" and up popped several websites. The one I read was a masterpiece. The writer did a superb job of explaining how this valve works. The valve is for safety, in that it will shut off the gas if a hose is severed or a major leak occurs. I knew this. Even when the valve is closed there is a small hole in the valve to let a very small amount of gas pass through. I suspected this as I would light the stove and get a nice flame that only lasted a few seconds and then go out.
What I didn't know was this! After turning on the tank valve we have to wait until the pressures equalize.
In other words, when we turn on the tank valve, the excess flow valve thinks there is a leak and closes, because the pressure is greater from the tank than is the pressure in the lines. That is why there is a small hole to let a vey small amount of gas escape through to the other side of the flow valve to equalize the pressure. So, after reading this I hooked everything back up, turned on the tank valve, poured myself a drink and waited about 20 minutes. Tried to light the stove and it lit immediately, along with the water heater and furnace. All worked great. So the lesson I learned is not to rush it. Pour yourself a drink and relax for awhile.
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09-09-2013, 04:09 AM
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#2
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Senior Member
Join Date: Jun 2011
Location: Kalamazoo, West Michigan
Posts: 1,817
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Thanks for the info. If I may add to your dissertation, another reason for the excess flow valve to deploy is the rapid opening of the tank valve. Try opening it s l o w l y. As a matter of best practice, do this with any valve that you operate whether on your air compressor, garden hose, steam line, or whatever. This doesn't apply to travel trailers, but if you throw a steam valve open and send a slug of condensate downstream you'll blow the pipes off the wall. Crack the valve and listen until you can't hear the sound coming from the valve then open it up the rest of the way. Just a word of advice from a pipefitter.
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2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.
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09-09-2013, 05:42 AM
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#3
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Senior Member
Join Date: May 2013
Posts: 353
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Lesson learned about propane tanks
Interesting...I did not know that. Thanks for sharing!
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2014 Ram 3500 SRW CTD
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09-09-2013, 07:46 AM
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#4
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Senior Member
Join Date: Jun 2012
Location: Southern Indiana
Posts: 1,326
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Quote:
Originally Posted by gtsum2
Interesting...I did not know that. Thanks for sharing!
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X2
Very good info......
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2017 Some Other Brand (SOB)
2013 Jayco Jay Feather X23B (She Gone)
2014 Ford Expedition
Gerard
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09-09-2013, 07:53 AM
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#5
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Junior Member
Join Date: Mar 2013
Posts: 10
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Pour yourself a drink and relax. Repeat as needed.
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09-10-2013, 07:18 PM
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#6
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Site Team
Join Date: Feb 2011
Location: DeWitt, MI
Posts: 1,212
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Quote:
Originally Posted by aj481x
Pour yourself a drink and relax. Repeat as needed.
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That's exactly why I camp
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MODERATOR
2007 Jayco Feather 19H
2008 Ford Explorer SportTrac
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09-13-2013, 11:43 AM
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#7
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Senior Member
Join Date: Jul 2011
Location: Long Island, NY
Posts: 1,402
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Great info!
BTW, what is the empty weight of your tank and how much did it actually weigh?
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2018 Jayco 28RLS
2012 F-250 6.2L 3.73
Equalizer Hitch
Yamaha 2400ISHC
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09-13-2013, 12:03 PM
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#8
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Senior Member
Join Date: Oct 2012
Location: Whittier, California
Posts: 298
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Very good info, thank you boatbuilder and mcfarmall for sharing this advise - it will come in handy for sure, especially the "pour yourself a drink and relax" part!
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~~eric.
2003 Ford F-250 XLT Lariat
6.0L Powerstroke V8
2013 Jayco JayFlight 24FBS
Equal-i-zer hitch
Tekonsha P3
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09-13-2013, 12:35 PM
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#9
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Senior Member
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 5,063
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I too have been down this road. My excess flow valve apparently closed due to my opening the tank valve rapidly but would not relax. A local RV shop (we were on a trip) didn't have a pig-tail the right length so they sent me to a propane shop nearby. While they were making a new pig-tail for me I learned that they can sometimes stick in the closed state but rapping the valve on something solid will most times reset the valve. So I now have a spare pig-tail.
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Cheers,
T_
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
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09-14-2013, 03:24 AM
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#10
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Senior Member
Join Date: Nov 2011
Posts: 141
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Quote:
Originally Posted by 2edgesword
Great info!
BTW, what is the empty weight of your tank and how much did it actually weigh?
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The empty weight of the tank is usually stamped on the tank. I believe that they call it the TW . TW stands for tare weight. Do not know if this info is still valid today.
Don
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09-14-2013, 04:07 AM
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#11
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Senior Member
Join Date: Mar 2013
Location: Planet Earth
Posts: 6,818
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Quote:
Originally Posted by Donr827
The empty weight of the tank is usually stamped on the tank. I believe that they call it the TW . TW stands for tare weight. Do not know if this info is still valid today.
Don
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X2.....It's law
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09-14-2013, 07:31 AM
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#12
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Senior Member
Join Date: Oct 2010
Location: Merrimack NH
Posts: 917
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So that's what that 30 pac is for !!!!!!!!!!!!!!!!! Larry
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Larry & Rachel Demers 2013 F150 Eco Boost Super Cab 6.5 bed 6 sp. 3.31 4x4 White Hawk 28DSBH
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09-14-2013, 01:14 PM
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#13
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Member
Join Date: Mar 2012
Location: Seattle, WA
Posts: 89
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Useful info, thanks for sharing.
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Enrico and Donna + 2 kids
RAM 2500 + Jayco Jay Flight 25BHS
Mods Done:
Black tank Quick-e Flush, MaxxAir Vent cover, TV bracket and LCD TV, added Slideout awning, bunk ladder, added socket and reading light to top bunk, added bathroom fan switch near light switch, insulated all externally accessible storage, sealed pass through storage from interior of trailer, LED lights throughout, added LED lights to storage compartments
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09-14-2013, 01:51 PM
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#14
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Junior Member
Join Date: Mar 2013
Posts: 15
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An empty 20 lb. tank weighs 18.5 lbs. When I weighed my tank it weighed 33.5 lbs. I subtract 18.5 from 33.5 which tells me I have 15 lbs. in the tank.
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09-14-2013, 04:39 PM
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#15
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Senior Member
Join Date: Mar 2013
Location: Planet Earth
Posts: 6,818
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Quote:
Originally Posted by boatbuilder
An empty 20 lb. tank weighs 18.5 lbs. When I weighed my tank it weighed 33.5 lbs. I subtract 18.5 from 33.5 which tells me I have 15 lbs. in the tank.
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Depends on the tank...all mine are stamped TW = 16.6lbs
Edit: I just weighed an "empty" TW = 16.6 (they're never completely empty) and it weighed 17.0
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