Is this on the 2016 MH?
Propane tank Service/Vapor Valve should NOT leak any propane out around valve stem when Opening or Closing the valve.
Valve stem has a packing gland that seals around the stem to prevent leakage
**Service Valve should be FULLY Opened and FULLY Closed
**Packing gland MAY have an adjustment nut (If so do not overtighten or valve will be VERY hard to turn) OR could use O-ring to seal
Propane Bulk Vendor can repair/replace if necessary...but tank would need to be empty
Propane residue from spraying (Ethyl Mercaptan...the stink oil) can linger for quite some time
Is it time for YOUR Medication or Mine?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31