Forum Discussion
parkmanaa
Oct 31, 2015Explorer
You are terribly wrong, Chris Bryant.
The "pigtail", when screwed into the OPD POL fitting, releases the check valve and allows normal flow of propane, but if you open it too quickly it will freeze the tiny orfice. You can open it very slowly and bring it to full flow, but again, as with a line failure, if it is a sudden burst of propane flow, it will freeze up.
The "pigtail", or longer line, if you wish, has nothing to do with the safety features built into the OPD valves.
I happen to own a propane dispensing station, and about the only time we screw a pigtail in the POL valve is to purge a new cylinder, and many times have opened the OPD valve too quickly and had the flow shut off immediately.
The "pigtail", when screwed into the OPD POL fitting, releases the check valve and allows normal flow of propane, but if you open it too quickly it will freeze the tiny orfice. You can open it very slowly and bring it to full flow, but again, as with a line failure, if it is a sudden burst of propane flow, it will freeze up.
The "pigtail", or longer line, if you wish, has nothing to do with the safety features built into the OPD valves.
I happen to own a propane dispensing station, and about the only time we screw a pigtail in the POL valve is to purge a new cylinder, and many times have opened the OPD valve too quickly and had the flow shut off immediately.
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