X2. I replaced both of mine when they were 3 years old. I had always had a minor propane smell around the tanks, but could never find it. I ultimately replaced both hoses when they quit passing propane. I didn't even know at the time that the hoses had safety valves in them. No propane smell since.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof