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07-03-2015, 05:30 AM
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#1
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Senior Member
Join Date: Nov 2014
Posts: 273
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100 lb. propane tank
Our 2002 HR literature says we have a 100 gallon propane tank. In fact, I believe it is a 100 pound tank. Anyway, I had it filled the first time yesterday. The gauge was reading about a quarter full. It held about 10 gallons. I was expecting it to hold more than that. I realize they are full at 80%, but just trying to figure out if my gauge is reasonably accurate. Anyone know what the capacity of these tanks in gallons would be?
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07-03-2015, 05:49 AM
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#2
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Senior Member
Thor Owners Club Ford Super Duty Owner
Join Date: Apr 2012
Location: Wherever the rig is parked
Posts: 8,092
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Liquid propane weighs 4.24 pounds per gallon, so a 100 pound tank holds 23.5 gallons, less 20% equals approximately 19 gallons at 80 percent full. The gauges are not particularly accurate. I usually start thinking about filling it when the gauge reads below half a tank.
__________________
Bruce Dickson 2013 Thor Challenger 37GT, 5 Star Tune, Safe-T-Plus Steering Control with Air Trim, Roadmaster front and rear Sway Bars, SuperSteer rear Track Bar, Crossfires, 2018 Honda CRV . Full timers since Jan 2012.
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07-03-2015, 05:50 AM
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#3
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Member
Join Date: Nov 2009
Location: Southwest Florida
Posts: 64
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Propane weighs 4.24 pounds per gallon. So 80 pounds is 18.87 gallons.
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Bill Bell - 2009 Coachmen FX21QB
2013 Thor Tuscany 40FX
2004 Winnebago Vectra 40AD
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07-03-2015, 06:12 AM
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#4
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Senior Member
Join Date: Mar 2013
Location: winter in Fl. 34957 summer Mi.48755
Posts: 116
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Most tanks are have a tag listing water capacity (WC).
if you have a 25 gal water capacity tank that = 23.6 gals of propane.
and 100 pounds of weight in propane.
Don't subtract 80% twice
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2005 Winnebago Adventurer 35A
Toad 2016 Equinox
W-22 GM 8.1 gas
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07-03-2015, 06:30 AM
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#5
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Senior Member
Monaco Owners Club Texas Boomers Club
Join Date: Jan 2009
Posts: 2,529
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Monaco products of "our" era have 38 gal. tanks...
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Hal & Ginny Miller '04 Beaver Santiam PRT40
'04 Saturn Vue - US Gear Brake - Blue Ox tow
3"girls" (2 Irish Setters - 1 Retriever) - RIP Annie & Emily (12/26/2017)
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07-03-2015, 06:39 AM
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#6
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Senior Member
Join Date: Sep 2013
Location: Alexandria, VA
Posts: 242
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A 100# tank is designed to hold 100# of propane -- not 80#. Sure, 100 minus 20% is 80, but that's not how it works. If the tank was only capable of carrying 80# of propane, it would be an 80# tank.
Bruce
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07-03-2015, 06:48 AM
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#7
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Registered User
Join Date: Mar 2010
Posts: 8,777
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Quote:
Originally Posted by epj
Our 2002 HR literature says we have a 100 gallon propane tank. In fact, I believe it is a 100 pound tank. Anyway, I had it filled the first time yesterday. The gauge was reading about a quarter full. It held about 10 gallons. I was expecting it to hold more than that. I realize they are full at 80%, but just trying to figure out if my gauge is reasonably accurate. Anyone know what the capacity of these tanks in gallons would be?
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epj
A 100 gallon propane tank when filled to the recommended 80% level holds 80 gallons, ( 339.2 pounds), of propane.
A 100 pound propane tank holds up to 100 pounds, (23.58 gallons), of propane.
I don't know which you have.
Sorry
I do know that my coach has a 35 gallon propane tank... (which holds 28 gallons when filled to the recommended 80% level).
Since propane weighs 4.24 lbs per gallon my tank holds up to 118.72 lbs of propane.
BTW, neither the gauge on my LP tank or the LP level LEDs on my monitor panel have ever been accurate... (however they do give me an indication of the approximate amount of propane in my tank).
Mel
'96 Safari Sahara
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07-03-2015, 06:59 AM
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#8
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Senior Member
Join Date: Nov 2014
Posts: 273
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Thanks. I suspected the gauge was not all that accurate. After being filled, it reads just over 3/4. Maybe that's the 80%. Looking at the tank, 38 gallons seems about right. There are some numbers on the tank, but very hard to read.
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07-03-2015, 08:27 AM
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#9
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Registered User
Ford Super Duty Owner
Join Date: Nov 2014
Location: NW Ohio
Posts: 7,114
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I'm the same. I also have 100 lb tank. The gauge on the tank isn't real accurate. I thought I took a couple pictures of "E" and "F" when I filled it last month. but can't find them.
Anyway, mine took 18 gallons at the last fillup and I know it was almost empty.
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07-03-2015, 08:39 AM
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#10
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,780
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The owner's manual for my 2002 Windsor says the propane tank is 43 gallons. I don't know if that's "total" or "usable" gallons?
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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07-03-2015, 08:41 AM
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#11
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Senior Member
Fleetwood Owners Club
Join Date: Jun 2009
Posts: 4,031
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Quote:
It held about 10 gallons. I was expecting it to hold more than that.
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So what did you buy with all that money you didn't expect to save.
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99 Discovery 34Q ISB
2014 MKS AWD EcoBoost Toad
Fulltime Since "99"
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07-04-2015, 09:14 AM
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#12
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Senior Member
Monaco Owners Club Holiday Rambler Owners Club
Join Date: Feb 2010
Location: Buffalo, NY
Posts: 1,632
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My coach specifications say it has a 39 gallon propane tank, but that the usable capacity is 80% of that, or 31.2 gallons. The last time I filled it when it was completely empty, it took an even 31 gallons until the over fill float valve closed it off. So that sounds in the ballpark. My propane gauge is the silly F, 2/3, 1/3, E lights: when completely empty it did show E, and when filled it did show F.
That 31 gallons would be 131 pounds of propane.
Quote:
Originally Posted by epj
Our 2002 HR literature says we have a 100 gallon propane tank. In fact, I believe it is a 100 pound tank.
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I would guess you are correct. It seems like a 100 gallon tank would be a very large tank.
__________________
Adam and Sue, and a pack of little furballs
2007 Holiday Rambler Endeavor 40PDQ Limited Edition - Cummins ISL 400
2013 Ford F-150 FX4 toad - USGear Unified Tow Brake, Roadmaster Blackhawk II Tow bar, Blue Ox baseplate
Home base near Buffalo NY, often on the road to a dog show
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