the government required OPD valves to prevent cylinders from being overfilled. yes many companies were overfilling 20lb cylinders and causing accidents. the OPD valve is just a simple float on the valve which shuts off the gas when it reaches the 80% level. the law required that the valve could not allow over 80% in the tank by volume, but most tanks are filled by weight because propane expands and contracts with the temperature. the OPD valve would shut off at 80%, but when the propane was hot,80 degrees and above, there would only be 19.5 lbs of propane in the cylinder. some consumer group found this out and sued the large cylinder refillers for cheating the public. you cannot put 19.5lbs in a cylinder and call it 20lbs and you cannot fill it over 80%. the answer was these tanks are now called simply gas grill cylinders and as long as the weight of the propane in the tank is at least as much as is stated on the label or cylinder cabinet and not filled over 80% everthing is legal. 15lbs is the norm for the big refillers. the cylinder can be over 12years old if it has had a new valve installed and has been recertified. most states require you to be licenced to do the recertification. yes your mom and pop stores can still fill your cylinder with 19.5 or 20lbs. help keep them in business. government regulation is forcing more and more propane dealers to sell out to the big major companies every year.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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