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12-18-2017, 09:35 AM
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#1
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Senior Member
Winnebago Owners Club
Join Date: Jan 2010
Location: Ohio
Posts: 225
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Propane Transfer to 20lb tanks
Has anyone transferred propane from coach supply to fill 20lb bottles. My coach has a 55 gal propane tank with a non press regulated outlet that can be used to hook up grill/stove. I would like to fill my 20lb portable tank also, but have no idea what size hose, shutoff valve or regulator is required if needed. Anyone ever done this and can you buy off the shelf units ready to use and if so where?
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2003 Adventure
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12-18-2017, 10:12 AM
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#2
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Senior Member
Join Date: Jul 2012
Posts: 2,565
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Quote:
Originally Posted by Ronbstewart
Has anyone transferred propane from coach supply to fill 20lb bottles. My coach has a 55 gal propane tank with a non press regulated outlet that can be used to hook up grill/stove. I would like to fill my 20lb portable tank also, but have no idea what size hose, shutoff valve or regulator is required if needed. Anyone ever done this and can you buy off the shelf units ready to use and if so where?
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I don't think you can do that. Most, if not all rv mounted tanks have a high flow shut off. They are set for a pressure amount and shut off if exceeded. Would not want to fill the rv with propane if you had a leak and filling a tank would,be like a leak! Sorry. Can't fill a tank with an extend a stay kit either. One way flow. That I know!
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12-18-2017, 10:15 AM
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#3
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Senior Member
Winnebago Owners Club
Join Date: Mar 2014
Posts: 14,885
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Quote:
Originally Posted by Ronbstewart
Has anyone transferred propane from coach supply to fill 20lb bottles. My coach has a 55 gal propane tank with a non press regulated outlet that can be used to hook up grill/stove. I would like to fill my 20lb portable tank also, but have no idea what size hose, shutoff valve or regulator is required if needed. Anyone ever done this and can you buy off the shelf units ready to use and if so where?
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Likely your high pressure line is vapor. You will not be able to put enough gas in the bottle to make it worth while.
__________________
Gordon and Janet
Tour 42QD/InTech Stacker
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12-18-2017, 10:30 AM
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#4
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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Propane is liquid in the tank. You would need a liquid port on your bulk tank to move propane to the empty BBQ tank.
Its proper name is " Liqufied Petroleum Gas " ( LPG )
Look at most propane fill station. The propane is pumped, as a liquid, from the bottom of the tank. If not the tank has an internal dip tube to the bottom.
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12-18-2017, 10:43 AM
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#5
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Senior Member
Thor Owners Club Ford Super Duty Owner
Join Date: Jul 2011
Posts: 3,788
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Quote:
Originally Posted by twinboat
Propane is liquid in the tank. You would need a liquid port on your bulk tank to move propane to the empty BBQ tank.
Its proper name is " Liqufied Petroleum Gas " ( LPG )
Look at most propane fill station. The propane is pumped, as a liquid, from the bottom of the tank. If not the tank has an internal dip tube to the bottom.
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100% correct. The coach tank in it's current configuration will not support a liquid transfer.
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2006 Hurricane 31D built on a 2006 Ford F53
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12-18-2017, 03:35 PM
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#6
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Senior Member
Join Date: Jul 2017
Location: Washington State
Posts: 802
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Pretty much opposite of what I am doing (though vapor xfer) - see custom hose the last several posts:
http://www.irv2.com/forums/f54/exter...nk-366100.html
With my setup, I could turn the external 30lb tank upside down and xfer to the RV tank but it would tank a long time and is illegal in my state (along with other states).
.
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1995 36' Gulf Stream Scenic Cruiser (Model #8360) on 1995 Spartan EC-2442 Chassis w/Granning Air Ride | Cummins B5.9L 12V 230hp | Allison MD3060 6-Speed WTEC II
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12-19-2017, 08:26 AM
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#7
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Senior Member
Winnebago Owners Club
Join Date: Mar 2014
Posts: 14,885
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Quote:
Originally Posted by CoachStreamr
Pretty much opposite of what I am doing (though vapor xfer) - see custom hose the last several posts:
http://www.irv2.com/forums/f54/exter...nk-366100.html
With my setup, I could turn the external 30lb tank upside down and xfer to the RV tank but it would tank a long time and is illegal in my state (along with other states).
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It will work by turning the 30 upside down. I wonder how efficient it would be. To get the propane to flow you would have to open the bleed valve on the tank being filled to create a pressure differential. Once the liquid has been transferred (how do you tell when the 30 is empty) you would have to wait until the hose was also purged of liquid (how do you tell).
We lose all of the propane vented from the bleed valve plus any that is left in the hose when unhooking. Will it be worthwhile?
__________________
Gordon and Janet
Tour 42QD/InTech Stacker
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12-19-2017, 08:42 AM
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#8
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,305
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Quote:
Originally Posted by Ronbstewart
Has anyone transferred propane from coach supply to fill 20lb bottles. My coach has a 55 gal propane tank with a non press regulated outlet that can be used to hook up grill/stove. I would like to fill my 20lb portable tank also, but have no idea what size hose, shutoff valve or regulator is required if needed. Anyone ever done this and can you buy off the shelf units ready to use and if so where?
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My brother does that all the time. His rig used to have a propane genset that was fed from a liquid fitting. He now has a deisel genset, so he rigged up a line for filling 20 pound bottles to the liquid fitting. He's a farmer, so we just call it a "Farmer Fix"
Happy Glamping.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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12-19-2017, 09:46 AM
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#9
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Senior Member
Winnebago Owners Club
Join Date: Jan 2010
Location: Ohio
Posts: 225
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Thanks so much for all the great replies. There's no mechanical problem with my RV system or 20lb bottle so to keep it that way I'll just stick with Flying J and U Haul as neither require filling that often.
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2003 Adventure
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12-22-2017, 07:07 PM
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#10
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Senior Member
Newmar Owners Club Coastal Campers Freightliner Owners Club
Join Date: Jan 2017
Location: Tampa, Florida
Posts: 737
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Quote:
Originally Posted by Ronbstewart
Thanks so much for all the great replies. There's no mechanical problem with my RV system or 20lb bottle so to keep it that way I'll just stick with Flying J and U Haul as neither require filling that often.
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It's a lot safer to leave it alone and have it filled at a commercial fill station. Transferring liquid propane any other way is dangerous. If any leaks out, it will evaporate immediately. Evaporation absorbs heat and anything the propane blows onto while evaporating will freeze. You wouldn't want that to happen to fingers, face, skin, etc. And think of the consequences if something disconnected under pressure and had liquid escaping, evaporating and freezing anything it touches, And the vapor came into contact with a flame or spark. Tanks are not designed to transfer liquid by turning them upside down. IHMO, for safety reasons you should never try that. Not worth it.
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Ken & Ara Brewer
2020 Newmar Ventana 3407 DP. (Previous 2016 Newmar Canyon Star 3710 gasser). 2014 V-6 Chevy Equinox Toad.
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12-22-2017, 07:26 PM
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#11
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,248
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I think this is a case where the risks way outrank the rewards.
__________________
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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12-22-2017, 07:28 PM
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#12
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Senior Member
Join Date: Jul 2012
Posts: 2,565
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I can't see any reward, only a possible night mare!
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12-22-2017, 07:35 PM
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#13
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Senior Member
Join Date: Jun 2017
Posts: 2,807
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Quote:
Originally Posted by Gordon Dewald
It will work by turning the 30 upside down. I wonder how efficient it would be. To get the propane to flow you would have to open the bleed valve on the tank being filled to create a pressure differential. Once the liquid has been transferred (how do you tell when the 30 is empty) you would have to wait until the hose was also purged of liquid (how do you tell).
We lose all of the propane vented from the bleed valve plus any that is left in the hose when unhooking. Will it be worthwhile?
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Don't need to open the bleed valve. A difference in pressure will be created by the weight of the liquid propane. The displaced gas will bubble up through the connecting line to the supplying tank
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12-22-2017, 08:53 PM
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#14
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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Dumping liquid propane from one tank to another works like an hourglass, sand or liquid. There is no outside venting needed. The heavier liquid falls thru the gas.
You don't absolutely need to open the vent while filling a propane tank at a filling station. You are not venting off gas to make room.
The vent is set at the 80% fill point and is monitored for when liquid propane starts to escape.
At that point you close the vent and stop filling the tank, if the OPD ( Overfill Protection Device ) hasn't stopped it already.
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