The cartridge seal will more than likely need to be replaced. If so just let me know and I can send you a seal with instructions on how to replace it.Nice! I have the 4 inch version of this. I've had it for probably 20 years now. I didn't even know they made a shorter one! Just the title of this brought me back to my teenage years. Gonna have to pull it out.of the closet and try it out soon. Hopefully CO2 cartridges last that long!