We owned a campground for several years, and one of our services was dispensing porpane. I had a MH to fill one day, nothing unusual when connecting the fill hose. When I disconnected it, the check valve in the tank failed, and the product came rushing back at me! NOT GOOD!!
I put the dispenser valve back on, and called my supplier. His utility man came right out, with an outboard valve on hand. After clearing the area, and keeping everyone away, heremoved my filling valve, some, but not much product vaporized and escaped, he removed the old check valve, and placed the new one on. Total time, less than 10 minutes. Seemed like a lot longer. When the old valve was removed, you could look into the tank, and see the pool of propane, but, it was not boiling to get out. We only lost a couyple gallons, fix was quick, and, relatively painless.
Might be best, if you can, get the professionals to do the work, they really understand that stuff!
Safety first with propane...always!!!
Back to a 5'er after 4 yrs fulltime.
Pulling with a '14 2500 ram, 6.4 Hemi.
Montana High Country 31RE