This AI-generated summary may contain inaccuracies. Please refer to the full thread for complete details.
A member reported that the original mounted propane tank on a Class A RV began leaking from the fill valve after refilling, with propane eventually escaping completely. The clearest community conclusion was that this points to a failing fill valve or related fitting on the fixed ASME tank, and that the issue needs prompt attention because propane can collect in low areas and create a serious hazard. Several experienced members noted that on fixed tanks the likely leak points are the fill...
More...
A member reported that the original mounted propane tank on a Class A RV began leaking from the fill valve after refilling, with propane eventually escaping completely. The clearest community conclusion was that this points to a failing fill valve or related fitting on the fixed ASME tank, and that the issue needs prompt attention because propane can collect in low areas and create a serious hazard. Several experienced members noted that on fixed tanks the likely leak points are the fill port, service valve, or bleeder valve, and that a valve or cap may sometimes simply need to be reseated if it was not fully closed after filling.
Most members agreed the safest and most practical path is to take the RV to a propane service shop or LP distributor for diagnosis and repair, especially since the member appeared inexperienced with propane systems. A few members suggested basic leak-checking with leak detector spray or soapy water to pinpoint the source. One especially detailed reply described using a Marshall Excelsior stacker valve as a temporary way to stop leakage through the fill port until proper repairs can be made, and the original poster said that suggestion was the most helpful. There was also some disagreement around do-it-yourself valve replacement: a few members shared successful personal repairs, but others warned that opening the tank and dealing with trapped air or vapor can be dangerous and should not be treated casually.
Trustworthy sources: 6 posts; Untrustworthy: 3 posts. Core consensus points: failing fill valve on a fixed ASME tank, get professional propane service quickly, verify exact leak point before repair. Outliers: DIY valve replacement without purge as an acceptable approach, using a stacker valve as a temporary workaround rather than immediate replacement.
