I had a small propane smell around my two tanks since new. I checked for leaks with soapy water a couple of years ago and didn't find a thing so I just forgot about it. Last week both pigtails stopped flowing propane apparently due to the excess flow valve in them. I guess these pigtails must have an end of life clock in them. Oh well! I replaced both pigtails with replacements from CW and two things happened. Flow was restored AND after a few days I didn't notice the smell any longer. I suppose I had a very small leak from the get go and just couldn't find it.
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