I have a very seldom, and sporadic need for gas to leak check.
Look online, and bottles (which of course need to be re-hydro tested) are over $100.
I may never use a full N2 bottle in my lifetime.
So, what is the best way to go? Systems likely to be R-12 under test. I have a corona discharge leak checker.
Would like to put a tiny bit of R-134a in with N2 into these systems for leak check, then evacuate and fix leaks or proceed. Wouldnt want to waste R-12 just to fill to recover.
But while stocking R134a or some NOS R-12 is one thing, high pressure nitrogen for the long run isnt my desire.
So what's the best way to go? What $ would I be looking at to do it? Seems there is more infrastructure for helium (balloons) than N2 or other gases. But He molecules being very small may be a diffusion issue. Dont want to use CO2 as I dont want to chance it liquifying in the system...
Also dont want to spend >$100 for n2 that Ill likely never use (or end up filling tires with).
Have you chacked with a local welding supply store? Most will rent a gas bottle by the day, you can use it for what you need and then return it. (Not sure if they will rent a regulator though.)
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