Actually I am versed in installing and servicing several systems including Kiddie and Pyro Chem. The term 'Pin Out" is just a general term that relates to the old kiddie systems and just kind of stuck as a term in the industry. Pyro chem uses a gas cartridge that can be unscrewed. The point is that some of the old systems can be a bit touchy so i was wondering if this was a standard safety practice or not. Of course if one did disable a system it would have to be tagged as out of service at the control head and any pull stations.