Would this recovery tank be worth getting?

[cyclopath]

Looks to be missing a fitting, which will make doing that before purchase difficult. Also looks like 1/4” npt directly into lid.

Be aware it might not actually BE npt see:

Welding NPTs shut; Stupid or Smart?

Haven’t seen anyone mention it yet so here’s my unfortunate experience: a lot of low quality Chinese import parts marketed to the cannabis industry has “NPT” threaded parts that don’t actually match the NPT spec for whatever size it is. Usually these are threaded straight, which is to say that a 1/4" NPT/pipe fitting should be 18 TPI (threads per inch) with a .055" pitch taper that gets smaller as the threads get deeper (opening side) and smaller towards the end (pipe side). Usually what happe…

I’d also suggest doing a hydro test rather than using compressed gas. See:

So I made a thing to decarb with

hydrostatic test it

The poor man’s version is to fill everything with water and then pressurize that with gas. Because you’re using only a fraction of the gas, you’re only storing a fraction of the energy.