A few months ago, I realized that the valve on one of my 20 lb propane cylinders would only turn fractionally. Of course, I discovered this shortly after I filled it. I started checking into valve replacements and soon realized that it would be more cost effective to just get a new cylinder. While exploring different options, I reconnected the cylinder in the RV. Surprise!! It opened just enough for gas to flow so I could at least get use of the existing propane.

When the cylinder finally ran out of propane, I headed down to the nearest L&M Fleet Supply store for a new cylinder. As luck would have it, they were right next door to a Tractor Supply that could purge and fill the tank. And that’s where the unexpected lesson took place.

I’ve been a certified propane dispenser for a few years, with actual training from the state of FL, so I was familiar with the purging requirement for new cylinders. Well, things have changed over the last few years and this cylinder had a sticker on it that said it had already been vacuum purged. Great! One less thing to do. The guy from TSC hooked up the hose and started pumping propane. At any other time, I would have insisted that he open the spit valve for safety reasons but since this was a brand new cylinder I let him proceed. Lo and behold, the OPD (overfill protection device) on this brand new cylinder did NOT work. He put over 5 gallons of liquid propane in that cylinder before shutting off the pump himself. Under normal circumstances, the OPD would have cut off around 4.8 gallons (max). So in this instance, bypassing normal safety procedures alerted me to a faulty OPD on a brand new cylinder. The propane guy bled off excess propane and I made arrangements with L&M Fleet Supply to replace the cylinder. When I got the replacement I was sure to ask the guy to leave the spit valve closed to check the OPD.