how much pressure will a scuba tank or nitrogen tank hold? is it that much more than a portable air tank from the parts store?

i know people who carry a portable air tank and $20 12V compressor. the compressor is very slow, but they rarely need more than the portable air tank holds.

i also know people who have built large air tanks into their bumpers. they use 3 to 6 inch square or round tubing that is thick gaged. then weld a pipe fitting into the end and attach a shutoff valve and a female air chuck. it's a good setup but heavy. these are usually on larger trucks.

 

well im in the fire dept. and are SCBA tanks hold 4500 psi. but i dont know about SCUBA. i would imagine they would be similar

 

I had the Olympic rear rock bumper/air tank a couple yrs ago and it was a joke. No matter what I tried the air fitting got full of mud. To use it was more of a pain then it was worth.

 

A steel 120 SCUBA tank can hold 120 cubic feet of air at 4500 P.S.I. You can get a good used SCUBA tank for under $100 and sometimes around $40.

Here is a similar set up specifically for off-roading, note the price tag http://powertank.com/products/sfID1/13/productID/27 over $600. The valves and hoses are all things you can make yourself just get someone that's done it before because if you screw up your tank it's no longer an air tank it's more akin to a bomb lol

 

how would you refill the tank to 4500 psi after you have used it up?

 

I'm from Hawaii (goin to college in VA) and you can get a year membership to a dive club for $20 to refill air whenever you want. If you live near the coast that's the easiest way but other wise you can usually find an auto shop with a pro grade compressor to fill them up again and it would only take a minor valve change to do so.

 

i'm land locked, no dive shops here. although there are several dives! i had no idea that auto shops had anything that would pump that much pressure.

 

Another place you can check is paintball shops. There compressors are oftentimes the exact same as used for SCUBA tanks, can go up to 4500psi and there are usually quite a few in any given area.

 

Dicks Sporting Gods has a hunting section where they also do this.

 

Yep but oftentimes Dick's is just CO2 not compressed air. That's fine for tires but I'm not sure about SCUBA tanks. I'd have to look into it. Specialty PB shops usually have both.

 

Or ask your local fire department.

 

Bump for more EXPO ideas??