Propane tank pigtail rupture

[Corycool]

Hi all, first time poster here. I just purchased a 2011 Keystone Hideout 19FLBWE last month as an upgrade from a pop-up. I was puttering around in it today and when I opened up one of the propane cylinders, I heard a loud pop then a hissing noise. I quickly went to shut it off. What had happened was the pigtail going from the tank to the regulator ruptured and exposed the braiding inside. What would have caused this? The only thing I can think of would have been that I might have turned the valve on too fast. Any advice would be great. Thanks!

[drsteve]

The hose was most likely either dry rotted, or had been chewed by a rodent. Replacements are readily available. Your turning on the valve had nothing to do with this.