air tanks

Anyone know where to find DOT air tanks 4" in diameter up to 32" length. I am trying to hide my tanks for an air ride under the caddy, I am hoping not to put the tank in the trunk but I do not think I may have any other options.

I would try and make my own but the 200psi is a bit scary to deal with.

Any suggestions welcome...

 

I just looked in my AirRide Tech cataloge, none there. Try Fleetpride or a semi truck parts house. I just replaced my push to lock airfittings with feral fittings from FleetPride. They had a bunch of small air stuff that would work in a car.

 

Fleetpride it is. if they don't have them, they know who will...they also carry kick *** stainless push lock fittings.

 

Watch as I display my ignorance..

Do air ride tanks need to be DOT certified? I know my propane cell does, but that's a combustible fuel.

 

Probably not for a p***enger car or small truck. If it busts it just lets out a big bang and air comes out. In semi trucks probably so. I was told by the guy at fleetpride that push to lock connectors were illegal in big trucks so I would to have say that the DOT checks the tanks to. I know that the airline used in airride setups has a DOT number all over it.

 

What about the smaller oxy bottles for tourches? Several sizes, pressure tested, available several places like harbor fraight.
Gene

 

1 Gal tanks available pretty cheap. Meets your 4" Diameter and at 16" long I would think you could daisy chain a couple together.

http://www.airridepro.com/index.asp?PageAction=VIEWPROD&ProdID=78485

Otherwise my brother-in-law is a Jeep guy and they make air tanks out of their custom 2x4 steel rocker sliders. Generally it's 1/8" wall or thicker and I haven't seen or heard of any problems.

Let me know what you end up doing...I have the same problem on my pickup.

 

On the 4x4 note, I made a tank for a friend once who was big into offroading. He wanted an air tank for his tools and to air up his tires, so I got a piece of 4" Schedule 40 pipe, 2 WeldBend end caps and some weld on thread-o-lets. If you're unfamiliar with pipe terms, the schedule 40 pipe is what we use normally in the industry, but for an air tank, its HEAVY DUTY!!! The WeldBend end caps are just that, round ended caps you weld onto the ends of pipe. The thread-o-lets are what we use to attach take offs onto the pipe...meaning....if you have a 10 inch main running through the ceiling, but you have to branch it off into 3/8, 1/2, 3/4, etc...pipe for something, you cut a hole in it with either a torch or hole saw, then screw in a threaded ****** into the thread-o-let to protect the threads from slag, and weld it on.

The tank I made for my friend was 4" pipe with 2 1/2 inch thread o lets on it. He put some valves in it and we fabbed some brackets and he used it as his rear bumper. It turned out pretty cool. Once everything was welded up, we ground down the welds on the end caps so they sat flush and it looked like a regular tube bumper, just a LOT bigger. It will hold at LEAST 300 pounds. The valves we used were rated for 600 pounds, and that was the weak link in the whole system!

If you go this route, you can make the tank any diameter you want, and any length you want, with however many ports you want. Picture the ports on any air tank you can buy from Air Ride or whatever, thats what a thread-o-let is, just a port you weld on with some threads. Just buy however many you want, make holes, then weld them on.

Any plumbing or pipefitting supply place carries these all the time and they're not that expensive. I "borrow" most of the materials from work and if you lived closer, I'd give them to you for free, but the whole thing won't even cost you 100 bucks.