Environmental Protection: The NEMA 4X enclosure and anodized aluminum body resist corrosion and harsh conditions

compatible with most residential and commercial low voltage transformers

ensuring the furnace operates within safe thermal parameters to prevent heat exchanger overheating

OEM Compatibility: Guaranteed direct replacement for CNT2222 and A19ACA-17

Watts 0383740 Valve R-410A Environmental Protection: The NEMA 4XThe Watts 0383740 (Series 740) is a high capacity iron body boiler pressure relief valve designed specifically for large scale hot water industrial and commercial heating systems. This ASME Section IV certified valve features a 1. 5 inch NPT female inlet and a 2 inch NPT female expanded outlet to facilitate rapid pressure discharge, effectively preventing catastrophic system failure due to thermal runaway. With a factory set relief pressure of 40 PSI