GasStop How The Propane Safety Device Works

Use Propane Safely, Use GasStop! GasStop is an emergency shut-off safety device for propane gas systems. GasStop will automatically shut-off 100% of the gas supply immediately-mechanically.

[bsjcook]

I purchased and installed on two 30 lb tanks. Both leaked because the threads that went from the gauge to the tank could not be tightened enough to keep from leaking - some slight problem with the dimensions at the manufacturing level I think. The concept is good, so I purchased another brand with internal threads.