Darryl, only some are rebuildable, a lot of them on powertorques are sealed units. I have had some luck in replacing the little plastic elbows with another one from another unservicable unit, however reults have not been that great.
A brand new decompressor is not cheap for backyard repair jobs but you may need to buy a new one if the long decompression valve is no good to you in its application, I am lucky enough to have a mountain of spares for my own use and havent had to buy one yet.
