The ProLine 107-401NL is not explicitly rated for propane use. For propane tanks, I recommend selecting a ball valve specifically labeled for propane or natural gas applications. Look for valves with appropriate certifications and materials suitable for handling propane safely. Remember, safety should always be the top priority when dealing with gas systems. If you’re unsure, consult a professional plumber or gas technician to ensure you choose the right valve for your propane tank