Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-27-2021, 05:20 AM   #1
3 Rivet Member
 
RMNummi's Avatar

 
2014 23' International
Saint Petersburg , Florida
Join Date: Oct 2020
Posts: 184
Viking Composite Propane Tanks

Anybody swap out their propane cylinders for the Vikings? Iím trying to reduce tongue weight on Intíl Serenity 23D. Already swapped out batteries for lithium. Anybody else wonder about huge tongue weight disparity on 23D vs 23FB?
__________________
RMNummi
2014 AS23D
TV #1 2017 Mercedes AMG GL63
TV #2 2017 Lexus LX570
RMNummi is offline   Reply With Quote
Old 11-27-2021, 06:38 AM   #2
Rivet Master
 
Foiled Again's Avatar
 
2012 25' FB Eddie Bauer
Vintage Kin Owner
Virginia Beach , Virginia
Join Date: Sep 2004
Posts: 7,668
I have heard, but can neither confirm nor deny, that composite tanks are not legal in RVs, moho or trailer. Aluminum tanks weigh about 7 lbs less than steel tanks. Not a lot.of.weight difference until you lift them manually.
__________________
Today is a gift, that's why they call it the present.
Foiled Again is offline   Reply With Quote
Old 11-27-2021, 07:58 AM   #3
3 Rivet Member
 
OrangeCrush's Avatar
 
2017 25' Flying Cloud
Longmont , Colorado
Join Date: Jan 2017
Posts: 181
I checked into them briefly a few years ago and concluded then they were not legal for RV use. Their marketing material indicates otherwise now so maybe something has changed and they are now DOT approved for RVs. They are only a few pounds less than aluminum which is another expensive option that saves you 10lbs per tank max. I believe with the Viking tank you have to go down to a 22lb size tank to fit in the Airstream tank box.

I see the spec tongue weight discrepancy you are talking about with 23D=720lb and 23FB=467lb. Are you saying the 23FB is significantly more than spec?
OrangeCrush is offline   Reply With Quote
Old 11-27-2021, 09:18 AM   #4
Rivet Master

 
2003 25' Classic
Antsville , FUBAR
Join Date: Jun 2007
Posts: 18,655
Images: 1
If the weight of the tanks is worrisome, it may be time for a lash-up evaluation.

Go for aluminum, they are lighter, and and look better longer. (most fill stations will question a rusty tank, AMHIK)

Bob
🇺🇸
ROBERT CROSS is offline   Reply With Quote
Old 11-27-2021, 09:22 AM   #5
Riveted...?
 
Justinhb's Avatar

 
2004 25' Safari
Central Valley , California
Join Date: Aug 2020
Posts: 58
Quote:
Originally Posted by ROBERT CROSS View Post
If the weight of the tanks is worrisome, it may be time for a lash-up evaluation.

Go for aluminum, they are lighter, and and look better longer. (most fill stations will question a rusty tank, AMHIK)

Bob
🇺🇸
@Robertcross...love how you keep updating your signature line...lol!
__________________
- Lots of people are engaging in risky behavior, but most of them just don't know how risky their behavior really is...

2013 Ram, 2500, Crew Cab, Cummins, 4x4, SRW, Short Box
2004 25', Safari LS w/ 3" Dexter Lift Kit on Henschen Axles,
Blue Ox
Justinhb is offline   Reply With Quote
Old 11-27-2021, 09:31 AM   #6
Rivet Master

 
2003 25' Classic
Antsville , FUBAR
Join Date: Jun 2007
Posts: 18,655
Images: 1
Quote:
Originally Posted by Justinhb View Post
@Robertcross...love how you keep updating your signature line...lol!
Let the 'mod's' know, they've let me know several times that 'it's not a signature' and is too long"

Bob
🇺🇸
ROBERT CROSS is offline   Reply With Quote
Old 11-27-2021, 10:17 AM   #7
3 Rivet Member
 
RMNummi's Avatar

 
2014 23' International
Saint Petersburg , Florida
Join Date: Oct 2020
Posts: 184
Yeah Mine are nearing their Recert and are looking long in the tooth. I was looking for other options but like the 30ís so probably swap for aluminum.

Vis a vis the tongue weight, was just tryptophan sleepy curious. Thatís a pretty wide variation in tongue weights between my 23D and the 23FB. They both weigh the same. Same tankage. Was wondering design wise how I got such a fat tongue weightÖitís accurate, Cat Scale tested. The real reason is curiosity if I stray to far from OEM spec handling/sway etc. if I start monkeying w/ lighter weight lithiums and composite tanks it will take off about 100lbs right at the hitch ball.
__________________
RMNummi
2014 AS23D
TV #1 2017 Mercedes AMG GL63
TV #2 2017 Lexus LX570
RMNummi is offline   Reply With Quote
Old 11-27-2021, 10:40 AM   #8
3 Rivet Member
 
2017 23' Flying Cloud
Mesquite , Nevada
Join Date: Jul 2019
Posts: 149
How propane dependent are you? Can you get by with 17# exchange bottles? You pay a little more but get the convenience of exchanging nearly every where and no big cash layout for aluminum.
Ken G is offline   Reply With Quote
Old 11-27-2021, 10:53 AM   #9
3 Rivet Member
 
2019 30' Flying Cloud
Grass Lake , Michigan
Join Date: Aug 2018
Posts: 210
Quote:
Originally Posted by Foiled Again View Post
I have heard, but can neither confirm nor deny, that composite tanks are not legal in RVs, moho or trailer. Aluminum tanks weigh about 7 lbs less than steel tanks. Not a lot.of.weight difference until you lift them manually.
I got curious about this and found that they are DOT approved: https://vikingcylinders.com/support/faq/

Also found this thread on Forest River forum discussing some refillers not wanting to refill the composite tanks:
https://www.forestriverforums.com/fo...ls-231272.html

I've thought about these or Aluminum as well, but in both cases the price scares me away. Maybe when my steel tanks expire...
oldenavy is offline   Reply With Quote
Old 11-27-2021, 11:26 AM   #10
2 Rivet Member
 
2021 27' Globetrotter
Tallahassee , FL
Join Date: Sep 2020
Posts: 57
Maybe you just need a vehicle with the load capacity for your set up. 1 gallon of water will eat up the weight savings of that composite or aluminum tank.
Kawboy01 is offline   Reply With Quote
Old 11-28-2021, 03:29 AM   #11
Rivet Master
 
switz's Avatar

 
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction , Arizona
Join Date: Sep 2012
Posts: 5,811
Images: 9
Even with no batteries in the battery box (315 amp hour lithium battery is just forward of wheel well street side under sofa and Dexter hydraulic brake pump is in battery box), our tongue weight is just over 900 pounds on our 2015 23D. Our 23D also scales 6,060 pounds camping ready. The two new 3,600 pound rated Dexter axles with 3" lifts and 12" dual puck disc brakes are are big improvements over the OEM equipment with 10" drum brakes.

Adding to the tongue weight is the inverter/charger just forward of the furnace along with other solar charging equipment and auto transfer between the front and stock rear 120Vac power inlets.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC

TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell

2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Tuson TPMS, disc brakes, 16" tires & wheels
switz is offline   Reply With Quote
Old 11-28-2021, 05:33 AM   #12
3 Rivet Member
 
RMNummi's Avatar

 
2014 23' International
Saint Petersburg , Florida
Join Date: Oct 2020
Posts: 184
We travel relatively light, OEM everything, empty black and grey, 10% fresh water, we donít really cook so always light on the supplies too! Ours came w/o the street side ZipDee awning and was relatively optioned lite. Our last scale was spec at 5895 and 652 on the tongue. TVís were the Mercedes GL63 (Tow Rated 7500lbs) and the Lexus variant of the Toyota Land Cruiser (7500). No problems at all so far. Havenít yet checked what removing 140 lbs of AGMs and adding back in only 52lbs in Lithiums (net weight loss 88lbs) effect on scale tongue weight. Additional weight loss coming: ordered 2 Viking composite propane tanks which are 26lbs empty vs. 110lbs for the original tanks (another 84lbs net weight loss for a total of 172lbs dry weight off the tongue)Ö.Iím guessing if I moved the lithiums back (out of the batt box to inside the trailer) it would reduce the tongue weight even more. Probable future weight gains will be adding your Dexter setup and upsizing the OEM wheels (Iíve got about a 11Ē drop from TV reinforced Hitch to AS).
__________________
RMNummi
2014 AS23D
TV #1 2017 Mercedes AMG GL63
TV #2 2017 Lexus LX570
RMNummi is offline   Reply With Quote
Old 11-28-2021, 08:43 AM   #13
4 Rivet Member
 
2015 30' International
FREDERICK , Maryland
Join Date: Jan 2014
Posts: 441
According to their website they are DOT approved

https://vikingcylinders.com/support/...ertifications/

Our cylinders are approved for use by the DOT and TC, and are actually far safer than steel propane gas tanks. Viking Cylinders propane tanks do not corrode or break down over time, and fire tests have proven they will not BLEVE. BLEVE is the technical abbreviation for Boiling Liquid Expanding Vapor Explosion. In laymanís terms this means our cylinder will not explode in a fire. Instead, the resin will burn off and the plastic liner and casing will melt. The LPG will then ďbreatheĒĚ through the cylinder wall and burn in a controlled manner. But donít forget propane is highly flammable and should be handled carefully. Improper use can be dangerous.
Viking Cylinders propane tanks are produced by Hexagon Ragasco, the worldwide leader in composite LPG cylinders. (You can learn more about Hexagon Ragasco here.) There are more than 12 million of these cylinders in service with families and businesses around the globe, and we have an outstanding safety record.
Doc Foster is offline   Reply With Quote
Old 11-28-2021, 09:17 AM   #14
3 Rivet Member
 
OrangeCrush's Avatar
 
2017 25' Flying Cloud
Longmont , Colorado
Join Date: Jan 2017
Posts: 181
If DOT approved the Viking tanks do look appealing. Downsides for me are still 1) None of my local fillers are listed on their "Find a Filler", 2) You only get 22lbs of propane in a 30lb propane tank size. Still seams like an expensive/exotic way to shave off a few pounds. At least with Lithium batteries you are getting other advantages along with weight savings.
OrangeCrush is offline   Reply With Quote
Old 11-28-2021, 09:20 AM   #15
4 Rivet Member
 
drmox's Avatar
 
2022 22' Bambi
Currently Looking...
Currently Looking...
Currently Looking...
Villa Park , Alabama
Join Date: Nov 2017
Posts: 282
Here's an idea:
It is totally not feasible, is certainly illegal, would look stupid, but is fun to think about. Fashion a rack across the rear bumper of the Airstream, and mount a whole row of propane tanks. That would reduce your tongue weight, give you all the propane you could ask for, and would really keep tailgaters at bay.
drmox is offline   Reply With Quote
Old 11-28-2021, 09:25 AM   #16
3 Rivet Member
 
RMNummi's Avatar

 
2014 23' International
Saint Petersburg , Florida
Join Date: Oct 2020
Posts: 184
Cool

Quote:
Originally Posted by drmox View Post
Here's an idea:
It is totally not feasible, is certainly illegal, would look stupid, but is fun to think about. Fashion a rack across the rear bumper of the Airstream, and mount a whole row of propane tanks. That would reduce your tongue weight, give you all the propane you could ask for, and would really keep tailgaters at bay.
I really like that idea... kinda James Bond/spy movie too..when being chased by the bad guys, just hit the release button and boom.
__________________
RMNummi
2014 AS23D
TV #1 2017 Mercedes AMG GL63
TV #2 2017 Lexus LX570
RMNummi is offline   Reply With Quote
Old 11-28-2021, 12:55 PM   #17
2 Rivet Member
 
2014 19' International
Aloha , Oregon
Join Date: Jul 2016
Posts: 31
I installed Viking tanks on our 23D. They come with filling certificates showing the DOT registration number and DOT special permit number in case it is necessary to convince the filler that it is OK to fill the cylinder. So far, no problems. I bought them because basically lighter is always good. The difference in weight compared to a full 30-lb steel cylinder is 23 lbs each which is 46 lbs of something else I can have influencing tongue weight but more importantly it is 23 lbs less to lug to the trailer from the propane filling station. Iím not specifically trying to lower tongue weight - just maintain it. My CAT scale trailer weight is 4820 lbs last time I measured it and my Sherline tongue weight is 740 lbs, or 15% of trailer weight, so I donít really need those extra 46 lbs for stability.
PeterDB is offline   Reply With Quote
Old 11-28-2021, 02:31 PM   #18
Rivet Master
 
2002 19' Bambi
Lafayette , California
Join Date: May 2005
Posts: 1,307
Quote:
Originally Posted by drmox View Post
Fashion a rack across the rear bumper of the Airstream, and mount a whole row of propane tanks. That would reduce your tongue weight, give you all the propane you could ask for, and would really keep tailgaters at bay.
Probably not good idea! Safety in an accident comes first to mind (such as for those tailgaters). In addition, you can find a number of threads warning that the frame is not able to support much weight on the back end of an Airstream.

Tim
Tim A. is offline   Reply With Quote
Old 11-28-2021, 02:39 PM   #19
3 Rivet Member

 
2019 30' Classic
2021 Atlas
Charlotte , North Carolina
Join Date: Jul 2018
Posts: 208
For some reason, I thought the composite tanks were only certified for 5 years rather than 10. Is that still true as well under the new DOT certification?
__________________
2019 Classic and 2005 Land Yacht 396 XL and 2 cats
LilPeanut is offline   Reply With Quote
Old 11-28-2021, 09:19 PM   #20
3 Rivet Member
 
RMNummi's Avatar

 
2014 23' International
Saint Petersburg , Florida
Join Date: Oct 2020
Posts: 184
Quote:
Originally Posted by PeterDB View Post
I installed Viking tanks on our 23D. They come with filling certificates showing the DOT registration number and DOT special permit number in case it is necessary to convince the filler that it is OK to fill the cylinder. So far, no problems. I bought them because basically lighter is always good. The difference in weight compared to a full 30-lb steel cylinder is 23 lbs each which is 46 lbs of something else I can have influencing tongue weight but more importantly it is 23 lbs less to lug to the trailer from the propane filling station. Iím not specifically trying to lower tongue weight - just maintain it. My CAT scale trailer weight is 4820 lbs last time I measured it and my Sherline tongue weight is 740 lbs, or 15% of trailer weight, so I donít really need those extra 46 lbs for stability.


Did you have to purchase the new base for the tanks?
__________________
RMNummi
2014 AS23D
TV #1 2017 Mercedes AMG GL63
TV #2 2017 Lexus LX570
RMNummi is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Composite LP tanks? Daquenzer LP Gas, Piping, Tanks & Regulators 4 07-09-2021 09:54 PM
17# Composite Propane Cylinders Airrogant LP Gas, Piping, Tanks & Regulators 15 11-24-2020 12:40 AM
Tanks, Tanks, Tanks PSU1981 Plumbing - Systems & Fixtures 8 09-02-2019 10:34 AM
composite LP tanks tarnished LP Gas, Piping, Tanks & Regulators 5 04-29-2012 12:19 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 05:40 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.