Re: pressurized tank ?
And if you're real lucky you might have the kind that has the threaded fuel/air nipps. In which case you just back them out and the pins, springs & o-rings come right out. Makes it MUCH easier to replace the o-rings! I have also pressed out the brass faces with a drill bit from the other end. They are press fit and makes for a fairly quick 5-minute job with no chance of leaving small chunks of rotted rubber inside the fitting...
- Scott