So what have I learned lately? What the heck those littler o-rings are for. No, not the litter ones you use for the your low pressure and high pressure hoses, they are a little bigger than those, but not much bigger than the one for the high pressure hose - or heck they may be the same size! All I know is when replacing a failed o-ring, use the bad one to find the right sized good one in your kit!
So lately, I've noticed that when dealing with DIN regulators besides the obvious o-ring you see externally needing to be replaced or just put BACK INTO PLACE (check your o-rings people
), I've noticed failures with the closest hidden internal o-ring. You can get there by either placing a large allen wrench directly into the DIN first stage (the face of your DIN) and unscrewing the first piece of your DIN reg - you'll see the o-ring on the piece you unscrewed from your regulator or you can get to it by simply unscrewing it by hand sometimes when the o-ring has failed. Perhaps the failures are caused it's because that piece of the reg that can move quite a bit when divers turn screw the DIN into place?Not because where the o-ring is located, OK yes because I can't describe where it is located (hey be happy I didn't use words like turn that thingy and unscrew the doo-bob), looking at the image below you would unscrew the the black piece in the lower left hand corner of the regulator right at the end of the screw threads. What comes out also has threads (obviously) and underneath what you've pulled out has an o-ring. It would remind you of a large port plug!
