Lochinvar & A.O. Smith 100111921 Relief Valve 30067439-890 5" WC for natural gas

5" WC for natural gas applications to maintain consistent burner flame stability

140X series valves are often compatible with SentryPlus Alert technology when used with a retrofit sensor kit

it is standard practice for a licensed HVAC contractor to inspect the primary and secondary limits for carbon tracking or pitting during replacement to ensure the safety circuit remains intact

including popular DGAM

Durable Construction: Built with high-grade materials to maintain temperature accuracy despite the dust and debris often found in technical HVAC supplies

Lochinvar & A.O. Smith 100111921 Relief Valve 30067439-890 5" WC for natural gasThe Lochinvar and A. O. Smith 100111921 Relief Valve is a critical safety component designed for high efficiency commercial boilers and water heaters. Engineered to meet strict ASME Section IV requirements, this pressure relief valve protects the heat exchanger and plumbing system from over pressurization by opening at its specific factory set PSI. This genuine OEM replacement part replaces older part numbers including 100111921 and RLVAL2409,