I have kinda gotten out of the PCP shooting foe several years and as I get back into it, I see my SCBA tank ( FD Turn in) expires in November so I need to be looking at a source for a new one. this is a SCBA, NOT a SCUBA tank.
I also want DOT certified tank. Probably the same manufacturer in china either way, one just costs more and has the certification,

I also need some of the Hatsan fill probe O-rings either a source, or specs so I can look locally or order from Mcmaster-Carr.

Going to have to remember to place the probe in and THEN connect to fill hose, so I do not nick them and cause a leak.

Check eBay. Lots of used turn ins with years left on the cert. date. Also a few sources of new ones.

Still Looking for source/specs for the Hatsan fill probe O-Rings.

Might need to look for this information over at "Airgun Nation"

Was just going to suggest that -- or Gateway to Airguns ...