Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
Sorry for bringing up this thread, but was just researching this for my new petrel coming in. This thread is proof in the genius of Shearwater Research. For anyone who hasn't realized this, 112 O-rings are the same O-rings on the back of your din regulators which every tech diver carries a bag of just in case. Utter brilliance!