|
09-17-2012, 06:25 PM
|
#1
|
Senior Member
Join Date: Jul 2011
Posts: 102
|
Propane questions
How many gallons of propane does a 20 lb. tank hold? How much does a gallon of propane weigh? Does a 20 lb. tank hold 20 lbs of propane, or is that the weight of the fuel plus tank? Finally, is there such a thing as a fuel gauge for a 20 lb tank that works? My dealer says not really, but geeze we put a man on the moon (once upon a time), how hard could it be to make a simple gauge that lets you know if you've got enough fuel for your next trip without having to top off the tank just to be sure? Any input appreciated, thanks.
|
|
|
09-17-2012, 06:42 PM
|
#2
|
Site Team
Join Date: Nov 2010
Location: Virginia`s Eastern Shore
Posts: 17,093
|
A 20 gallon tank holds about 4.7 gallons, but they are not to be filled beyond 80 - 85% so most fill to 4 or 4.5 gallons. A gallon weighs about 4.2 lbs.
The propane in a 20lb tank weighs 20 lbs if completely full hence the 20 lb designation, but here again 16 to 18 lbs would be considered about full. The Blue Rhino exchange tanks only have 15 lbs of propane in them, you`ll get more propane with a refill of your tanks for less money in most places.
There are some gauges available but I`ve never used them, if it feels light to me I fill it. But we do not use that much propane, maybe 30lbs in a season.
__________________
2017 Coachmen Catalina 283RKS
2018 Ford F250 Super Duty 6.2l CCSB
2010 Jayflight 28BHS (sold)
|
|
|
09-17-2012, 06:43 PM
|
#3
|
Senior Member
Join Date: Jul 2010
Location: Central NY
Posts: 203
|
Google says 4.2 Lbs per US Gallon. Thus 4.1 Gallons per 20 Lb. cylinder The 20 Lbs does not include the weight of the empty cylinder.
__________________
|
|
|
09-17-2012, 07:16 PM
|
#4
|
Senior Member
Join Date: Sep 2011
Location: Long Island, NY
Posts: 849
|
Quote:
Originally Posted by Rapidly
How many gallons of propane does a 20 lb. tank hold? How much does a gallon of propane weigh? Does a 20 lb. tank hold 20 lbs of propane, or is that the weight of the fuel plus tank? Finally, is there such a thing as a fuel gauge for a 20 lb tank that works? My dealer says not really, but geeze we put a man on the moon (once upon a time), how hard could it be to make a simple gauge that lets you know if you've got enough fuel for your next trip without having to top off the tank just to be sure? Any input appreciated, thanks.
|
We got burnt twice this year by running out of gas. We thought it was weird and brought it in for a possible leak but they said all is well. That's why it's ideal to have a dual tank setup so that way if one runs out you can just switch to the next tank and then fill the empty tank when you get home. This was one of the main things we looked for in our new camper.
__________________
2013 Jayco Jay Flight 26RLS - 2013 1500 Ram Big Horn
2013 Jayco White Hawk 28DSBH - 2010 V8 Tundra
2012 Jayco X17Z SOLD!:Beerchug:
|
|
|
09-17-2012, 07:18 PM
|
#5
|
Senior Member
Join Date: Feb 2011
Location: Germantown, TN
Posts: 4,923
|
There are gauges out there that are supposed to tell you the propane level, but they do not work IMHO. I am not an expert, so if I have this a little off someone correct me....but there is liquid in the bottom of the tank and you are pulling off the gas. The pressure of the gas remains pretty constant until the end. Some of our motor home folks can chime in, but I think they have a special sensor in the tank that gives the level reading - but those tanks are permanently mounted. The 20 and 30 lb tanks dont have it I imagine because it just adds to the cost.
Here is my trick - I tap on the tank with finger and wedding ring....as you move down the tank the sound changes and I can tell about where the level of liquid starts.....not exact, but gives me a rough estimate. Granted my ring is not really round anymore...and has a crack in it...but hey...after 20 years of marriage you would expect a few cracks
|
|
|
09-17-2012, 08:02 PM
|
#6
|
Senior Member
Join Date: Oct 2010
Location: West Texas
Posts: 2,114
|
Quote:
Originally Posted by tafische
Here is my trick - I tap on the tank with finger and wedding ring....as you move down the tank the sound changes and I can tell about where the level of liquid starts.....not exact, but gives me a rough estimate. Granted my ring is not really round anymore...and has a crack in it...but hey...after 20 years of marriage you would expect a few cracks
|
..."after 20 years you would expect a few cracks"....I agree...and also a few on your head...especially after 41 years. Good method, fishy...it works as well as anything else.
__________________
Dan
2016 Chevy LTZ - Duramax/Allison
2008 Eagle 30.5BHS
|
|
|
09-18-2012, 07:31 AM
|
#7
|
Senior Member
Join Date: Jul 2012
Location: Kansas City
Posts: 289
|
Best way to gauge, weigh your empty tank, then weigh your full tank. You can get really small weighing devices at sporting good stores that are for weighing fish.
X
__________________
...she started talking about how I never listened to her or somethin, I donno, I wasn't really paying attention...
2017 Jayco 287BHSW
|
|
|
09-18-2012, 08:27 AM
|
#8
|
Senior Member
Join Date: Sep 2011
Location: King George
Posts: 2,761
|
I use a good old fashion clothes line pin clipped around the propane hose being used. When it runs out I move the pin to the other line... Otherwise I forget which one to switch to. I try to take the empty one to get filled right away.
Then I usually forget which one gets the clothespin - the one that is full or the one that is empty - its fun getting old...
Since i stopped running the furnace so much I get a long life out of two 20LB propane tanks on my POPUP trailer...
We also cook alot on the Coleman Roadkill grill which uses the 1lb canisters...
I too have those in-line gauges and everytime I look at them when I open the valve they always read full or green...
Dont have much faith in them...
__________________
Roy and Carolyn
I claim Horse Creek Country in Southern Ill - Momabear is from North Texas
We live in King George VA
RETIRED DOD DOAF DON CONTRACTOR Electronics Tech 42YRS
"We're burning daylight" - John Wayne
2008 STARCRAFT 14RT OFF-ROAD POPUP with PD9260C and three 85AH 12VDC batteries
2010 F150 FX4 5.4 GAS with 3.73 gears - Super Cab - Towing Package - 2KW Honda EU2000i Gen
K9PHT (since 1957) 146.52Mhz
"We always have a PLAN B"
|
|
|
09-18-2012, 09:46 AM
|
#9
|
Senior Member
Join Date: May 2012
Location: Boston
Posts: 664
|
your tank will be stamped with a weight when full. I think mine are stamped 40.2 lbs. That the 20lb of propane plus the weight of the tank. On a side note... and I just learned this. By law exchange tanks such as blue rhino and amerigas are only allowed to be filled to 15 lbs. So do yourself a favor and never exchange out your own tank because although they are 20lb tanks they cannot be filled to 20 lbs therefore you get ripped off 5 lbs. And there more expensive.
For checking the level, I pour hot water over the tank and then run my hand down the side of the tank until you feel the metal cold. Where the metal changes from warm to cold is the level of propane inside the tank.
__________________
2013 White Hawk 28 DSBH
2011 Jay Feather X23J (traded-in)
2011 Ford F-150 XLT w/towing package
RoadMaster Active Suspension
Reese Trunnion Bar WDH w/Dual Cam sway control
|
|
|
09-18-2012, 05:38 PM
|
#10
|
Senior Member
Join Date: Aug 2011
Location: Indianapolis
Posts: 371
|
My trailer has an auto switching valve. I just check the tanks when I usually fill up at a flying j. When empty the valve goes from green to red, and starts to pull from the full tank. I then switch to the full tank and fill the empty one. I ten know I am good to go for a while.
|
|
|
09-18-2012, 07:11 PM
|
#11
|
Senior Member
Join Date: Sep 2012
Location: Selah, Washington
Posts: 131
|
On the collar of the tank should be the initials TW which stands for tare weight. That is the empty wt of the tank. weigh the tank on your bathroom scales, deduct the TW and divide the balance by 4.2 and that will give you the number of gallons left. Best to do this all outside. Hope this helps.
__________________
2011 Jayflight 23FB G2
2003 Chevy 1500 4x4
Wife Peggy and 2 Beagles and a rescue Cocker Spaniel
2007 Yamaha Grizzly 400 ATV and Yamaha 2000 watt Genny
Me/retired insurance claims and DW/retired RN.
"If the women don't find you handsome, they should at least find you handy."-Red Green
|
|
|
09-19-2012, 08:21 AM
|
#12
|
Senior Member
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 5,063
|
The small propane shop where I fill has mechanical guages. There's a probe with a float attached to the valve (you have to replace the existing valve) that rotates a small magnet in the valve assembly. The guage clips to the outside of the valve and the needle is controlled by the magnet position. The owner told me that he hasn't had any complaints with them but the guage tends to fall off and get lost (it's only clipped on) and he sells replacements fairly often.
The common guages work off pressure and as tafiche points out aren't very good. IMHO they will tell you when the tank is empty (or very nearly so) and if the tank is empty I don't need a guage to tell me that.
__________________
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
|
|
|
09-22-2012, 11:40 AM
|
#13
|
Senior Member
Join Date: Jun 2011
Location: Kalamazoo, West Michigan
Posts: 1,817
|
Too bad we all aren't driving propane powered forklifts. They have nifty gauges built in to the tanks. I wonder why 20-30lb RV tanks don't have the same thing unless the orientation has something to do with it. Forklift tanks are horizontal when in use.
Maybe Hank Hill could chime in.
__________________
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.
|
|
|
10-11-2012, 04:30 AM
|
#14
|
Senior Member
Join Date: Apr 2011
Location: near Englewood, FL (South of Venice)
Posts: 1,243
|
All propane cylinders are have their tare weight (TW) stamped on them. TW is the weight of the tank as it was manufactured - no propane. On a 20 pound cylinder it is usually 16 to 19 pounds.
After you weigh your cylinder, subtract the TW. The rest of the weight is propane. And as previously stated in this thread, each gallon weighs about 4.2 gallons.
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|