Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > MOC Technical Forums > Additions & Improvements
Click Here to Login

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-26-2008, 06:33 AM   #1
lcarter
Montana Fan
 
Join Date: Jun 2007
Location: Madison
Posts: 131
M.O.C. #7240
30 # vs 40 # propane tanks

Has anyone changed their 30# tanks for 40 # propane tanks? I am thinking about installing a LP generator in our 3485SA Montana. The 40# ones would add about 5 gallons more propane. Will they fit?
LCarter
 
lcarter is offline   Reply With Quote
Old 01-26-2008, 07:33 AM   #2
firetrucker
Montana Master
 
Join Date: Oct 2004
Location: Gardnerville
Posts: 749
M.O.C. #2165
Since propane is about 4.2 lb/gal, you'd only get two to three more gallons in a 40# tank. Would it fit in the rig?

Bob
firetrucker is offline   Reply With Quote
Old 01-26-2008, 07:49 AM   #3
illapah
Montana Master
 
Join Date: Nov 2003
Location: Layton
Posts: 1,048
M.O.C. #666
30# specs:
7.1 Gal
12.125 inches diameter
23.687 inches tall
25.4 pounds tare weight

40# specs:
9.4 gal
12.125 diameter
29.250 tall
33.6 pounds tare weight

As to fit, I don't know.
illapah is offline   Reply With Quote
Old 01-26-2008, 07:49 AM   #4
ols1932
Montana Master
 
Join Date: Aug 2004
Location: Cedar Rapids
Posts: 4,876
M.O.C. #1944
They wouldn't fit in mine without some hose changes. I personally don't recommend them simply because as I age the bottles get heavier! It's hard enough to put the 30# bottles in the truck, take them out, and put them in the rig! I don't know about you guys but I'd rather wrestle my 50-amp cable than with 40-lb propane bottles.

Orv
ols1932 is offline   Reply With Quote
Old 01-26-2008, 10:35 AM   #5
HamRad
Montana Master
 
Join Date: Nov 2002
Location: Bakersfield
Posts: 5,316
M.O.C. #15
I doubt if I'll switch to the 40#ers even if they fit; but I sure would like the new "see through" tanks. Man it would be so much easier to know when to fill 'em up.

HamRad
HamRad is offline   Reply With Quote
Old 01-27-2008, 07:46 AM   #6
lcarter
Montana Fan
 
Join Date: Jun 2007
Location: Madison
Posts: 131
M.O.C. #7240
Thanks for the input. The 30# are a pain and for some reason they seem to have gotten heavier over the years.
LCarter
lcarter is offline   Reply With Quote
Old 01-27-2008, 02:35 PM   #7
clutch
Montana Master
 
Join Date: Jun 2007
Location: St.Maries
Posts: 1,010
M.O.C. #7329
I don't think I would want to deal with longer lines and the extra weight.
clutch is offline   Reply With Quote
Old 01-27-2008, 05:13 PM   #8
Trailer Trash 2
Montana Master
 
Trailer Trash 2's Avatar
 
Join Date: Nov 2003
Location: Santa Fe Springs
Posts: 4,189
M.O.C. #639
After looking at the mounting cabinet that the tank rest, on I do not think that a larger tank would be desined for the tank compartment or be able to safely handle the extra weight for long. I went and purchase another tank, and I carry it in the bed of the truck along with my 2.5 gal and 4.5 gal tanks.
__________________
Pulling a 2004, 2980 RL an oldie but goodie.
Tow vehicle is a 2009 RED RAM 3500 DRW.
Trailer Trash 2 is offline   Reply With Quote
Old 01-28-2008, 05:29 AM   #9
skypilot
Montana Master
 
Join Date: Jul 2004
Location: Manhattan
Posts: 1,144
M.O.C. #1846
'See through' tanks???? Haven't seen nor heard of those before.

On edit -- got me curios so I did a google search and found some -- no prices or sources -- just curious as to what they were. Interesting. Will be nice to see what the fire marshals finally approve -- the one article I read in detail indicated that manufacturers were working to get the US Fire code updated to allow them in more things. Would be nice to see just how much fuel you have left!!
skypilot is offline   Reply With Quote
Old 01-28-2008, 05:50 AM   #10
illapah
Montana Master
 
Join Date: Nov 2003
Location: Layton
Posts: 1,048
M.O.C. #666
Saw a 20 pound clear for $102. (Sez fer BBQ)
illapah is offline   Reply With Quote
Old 10-10-2021, 11:48 AM   #11
WhatExit?
Seasoned Camper
 
Join Date: Mar 2021
Location: Mesa
Posts: 72
M.O.C. #28356
Tare Weight
The empty cylinders of 20, 30 or 40 pounds capacity feature the same diameter. But the height varies a few inches. Therefore, the tare weights of these are 5-6 pounds distant from each other. Here is the list-

Tare Weight of 20 lbs propane tank: 16.6 pounds.
Tare Weight of 30 lbs propane tank: 23.5 pounds.
Tare Weight of 40 lbs propane tank: 29 pounds.

Propane Weight
Propane weight of 20 lbs propane tank: 19.8 pounds
Propane weight of 30 lbs propane tank: 30.8 pounds
Propane weight of 40 lbs propane tank: 41.36 pounds

Full Weight
Full weight of 20 lbs propane tank: 36.4 pounds
Full weight of 30 lbs propane tank: 54.5 pounds
Full weight of 40 lbs propane tank: 70.36 pounds

Link to above and more info:
https://camper101.com/20-lb-vs-30-lb...e-tank-for-rv/
__________________
2021 Keystone Montana 3120RL w/ Onan 5500 & solar
2021 Ford F350 6.7L CC SRW SB w/ B&W Companion Slider, Smart Air II air bags
Home base is Mesa, AZ
WhatExit? is offline   Reply With Quote
Old 10-10-2021, 12:30 PM   #12
DadsHemi
Montana Master
 
DadsHemi's Avatar
 
Join Date: Sep 2017
Location: Florence
Posts: 945
M.O.C. #20472
I thought about it……but bought two extra 30lb tanks. I don’t have a generator but the cold weather from last February it sure paid off having those extra tanks.
__________________

2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
DadsHemi is offline   Reply With Quote
Old 10-10-2021, 05:07 PM   #13
Daryles
Montana Master
 
Daryles's Avatar
 
Join Date: May 2019
Location: Alton
Posts: 2,654
M.O.C. #24086
Quote:
Originally Posted by HamRad View Post
I doubt if I'll switch to the 40#ers even if they fit; but I sure would like the new "see through" tanks. Man it would be so much easier to know when to fill 'em up.

HamRad
Have a look at Mopeka tank monitors.
I have had mine for just over 2 years. They work great.
Attached Thumbnails
Click image for larger version

Name:	Screenshot_20211010-180601_Tank .jpg
Views:	75
Size:	100.0 KB
ID:	10329  
Daryles is offline   Reply With Quote
Old 10-10-2021, 05:14 PM   #14
mhs4771
Montana Master
 
mhs4771's Avatar
 
Join Date: Dec 2009
Location: Sebring
Posts: 3,657
M.O.C. #9969
What has happened to the "Manly Man", I'm a 73 year old Female and can still get my 40# tanks in and out. Granted they are heavy and I wouldn't want to do it day in and out, but can still manage it.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
mhs4771 is offline   Reply With Quote
Old 10-10-2021, 05:56 PM   #15
Montana Man
Montana Master
 
Montana Man's Avatar
 
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
If humping a few less pounds matters there are composite tanks available at half the weight. Plus you can see the propane level.
__________________
2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
Montana Man is offline   Reply With Quote
Old 10-10-2021, 09:26 PM   #16
Ram Montana High Country
Montana Master
 
Ram Montana High Country's Avatar
 
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,877
M.O.C. #19944
That reminds me I need to get a tank filled after traveling 1/3 of the year ... on the list tomorrow
__________________
RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
Ram Montana High Country is offline   Reply With Quote
Old 10-10-2021, 11:22 PM   #17
firestation12
Montana Fan
 
Join Date: Jul 2019
Location: Mesa
Posts: 277
M.O.C. #24588
Know before you buy

Quote:
Originally Posted by lcarter View Post
Has anyone changed their 30# tanks for 40 # propane tanks? I am thinking about installing a LP generator in our 3485SA Montana. The 40# ones would add about 5 gallons more propane. Will they fit?
LCarter

Propane generators consume fuel much faster than their liquid fueled cousins. A 5500 Onan will suck that 40 pound propane cylinder empty in no time. Do some research to see if propane will work for the anticipated mission you have in mind.
firestation12 is offline   Reply With Quote
Old 10-11-2021, 04:17 AM   #18
MARK A
Montana Master
 
Join Date: Jan 2016
Location: STAYTON
Posts: 1,118
M.O.C. #18157
Mone did. No changes needed
__________________
“Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times.”
MARK A is offline   Reply With Quote
Old 10-11-2021, 05:22 AM   #19
RMcNeal
Montana Master
 
RMcNeal's Avatar
 
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,117
M.O.C. #25165
Add another vote for the Mopeka tank sensors. I thought maybe they were a gimmick, but they really do work well. I usually only use the furnace for a 3 week hunting trip in November/December each year. I was concerned that I would need extra propane and had thought about going to the 40 lb tanks. They will fit in my rig, but I found that I only burned about 15% of one tank during that 3 week trip the first year. I use electric heat a lot and have wireless thermometers in the belly, basement and garage. Once I get the rig warmed up, the electric heaters keep it there with no problems, even and sub-zero temps for a few days. Never had a propane generator though. I've heard they really suck down the propane. If you're stationary, you might consider renting a 100 lb cylinder delivered. Price is reasonable in many places and some one else has to do the heavy lifting.
__________________
Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
RMcNeal is online now   Reply With Quote
Old 11-11-2021, 03:09 AM   #20
DougVelting
Seasoned Camper
 
DougVelting's Avatar
 
Join Date: Dec 2020
Location: Bayville
Posts: 60
M.O.C. #27691
We have the 381TH and switched out our 30s for 40s.
They fit, just barely, without moving anything or needing different lines.
It definitely made a difference in how frequently we need to get them filled, and with having the generator i figured even if only a little, having the extra propane on board wouldnt hurt.
__________________
Our Travel Blog
2018 Montana 381TH & 2016 F350 King Ranch
Our Youtube Channel
DougVelting is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
propane tanks jenabby General Discussions about our Montanas 4 07-30-2014 04:35 AM
Propane Tanks Jewels Montana Problems, Problem Solving & Technical Help 22 12-12-2013 08:00 AM
Propane Tanks maximo General Discussions about our Montanas 2 07-18-2011 07:51 AM
Propane Tanks CasaDelSol Montana Problems, Problem Solving & Technical Help 9 05-22-2009 11:03 AM
1# Propane tanks Ozz The Campsite 6 05-16-2007 05:53 PM

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 07:26 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.