Thread Tools Search this Thread Display Modes
Old 01-03-2010, 01:49 PM   #1
2 Rivet Member
Joebanjo's Avatar
1976 29' Ambassador
Wichita , Kansas
Join Date: Nov 2009
Posts: 68
Identify my Aluminum tank???

At the risk of sounding like a complete idiot, I need a little help to identify what size my aluminum LP tanks are. I was assuming they were 40lb. tanks, but am questioning myself now that I have read some of the threads on this forum. My tanks are Worthington Aluminum, and measure 26 5/8 " tall. They need new updated valves and to be re -certified.
Also, I understand that the aluminum tanks require a different valve than the steel tanks due to the shape of tank. I was advised as to the valve for the 40lb. tank ( 7 inch drop) but in the event I have 30 lb. tanks , which valve do I ask for.

Many Thanks


Joebanjo is offline   Reply With Quote
Old 01-03-2010, 01:57 PM   #2
Commercial Member
eubank's Avatar
1967 30' Sovereign
1999 31' Land Yacht
Bosque Farms , New Mexico
Join Date: Jan 2004
Posts: 6,539
Look at the collar of your cylinder. There you'll find "WC" followed by a number. WC is water capacity in pounds; multiply that number by .42 to find the capacity of the cylinder for propane.


WBCCI 21043
eubank is offline   Reply With Quote
Old 01-03-2010, 02:32 PM   #3
Rivet Master
RickDavis's Avatar

1961 24' Tradewind
1969 29' Ambassador
1970 21' Globetrotter
Jamestown , Tennessee
Join Date: Jul 2008
Posts: 1,781
THe dealer replacing the valves on your tanks should know what you need.

That being said, I just went out and looked at some of my tanks.. The 30 pounders are about 27 inches high.

I had several revalved in 99 when the change over was done by a dealer in Ohio. These are equipped with valves with a 5.8 inch dip tube.
I seemed to lose a little capacity compared to the original valves. Perhaps as much as a half gal. they usually fill to about 6.9 gal

I had another one redone by a local company that Hydrotests tanks sent from all over the U.S. so one would assume they know what they are doing.

The valve they used was a dip tube length of 4.8 inches. I have not emptied this tank to know what the refill capacity is but I seem to recall the typical 30 lb bottle should hold somewhere around 7.2 gallons.

I have not had any problems with the one with the shorter tube blowing off when left in the sun so it must be ok.

The dip tube length, at least on the new valves will be stamped on the side where the wrench flats are. Will say something like DT 4.8

Don't have any old ones to see if they have similar markings
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles

RickDavis is offline   Reply With Quote
Old 01-03-2010, 05:21 PM   #4
2 Rivet Member
Joebanjo's Avatar
1976 29' Ambassador
Wichita , Kansas
Join Date: Nov 2009
Posts: 68
Thanks eubank. my result is 29.86 lbs.

30's they are..!!!

Joebanjo is offline   Reply With Quote

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
Can anyone identify what I have marvin 1954 - 1959 Overlander 42 12-31-2009 10:12 PM
Can anyone identify these? bullydogsmom General Interior Topics 7 04-06-2009 05:20 AM
Help identify cosmotini Off Topic Forum 17 01-04-2008 11:22 PM
Can Anyone Identify? rhoward Airstream Trailer Forums 12 12-11-2007 06:42 AM
Aluminum Tank Cover Top? toadtogo LP Gas, Piping, Tanks & Regulators 7 11-09-2006 08:56 AM

Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:03 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.