With its NEMA 4 (IP65) rated enclosure

While some older kits used fiber

220741A2-62 is identical to 220741A2-62/U

The forged brass body and stainless steel stem assembly are built to withstand high static pressures up to 300 PSI

verify the 115V rating and lead protection requirements for your specific installation site

Lochinvar & A.O. Smith 100111921 Relief Valve 323269-701 With its NEMA 4 (IP65)The 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,