Originally Posted by
Aimstraight
I tried the new spare piercing cap for the Tau 7 (which came with an o-ring fitted)....tightened up the piercing cap....all seemed fine....then all the gas p1$$ed out again!
Not happy with this situation, two piercing caps, apparently the correct o-rings, but all have wasted the gas from numerous 12gm Co2 bulbs of various manufacture. The seal blows out and distorts, they are just not holding the C02 pressure. I shall be looking for an alternative, either a greater radial thickness of seal, or a more rigid seal material (e.g. polyurethane).