While reading and posting a response to a fellow reefer I got off on this topic and rather than typing all this up on a post I figured I would share my knowledge on this subject in a blog rather than a response post. To give everyone a little background I am former US Air Force and my job consisted of plumbing, natural gas, fire systems, maintenance and new installations, as well as water purification. I worked in this particular career field for 6 years before leaving the military to spend more ...