the 100% molecular sieve core is optimized for high moisture removal and acid adsorption

minimizing mechanical vibration and wear

automatically returning to a fixed close at 150°F once internal temperatures stabilize

Simplified Diagnostics: Standard 1/4" quick-connect terminals and vacuum port allow for rapid installation and manometer testing

OEM Precision: Guaranteed 1/2" bore sizing and set-screw alignment for industrial-grade stability on the motor shaft

Watts 0383542 Valve R-410A the 100% molecular sieve coreIf you are servicing high output boiler systems, the Watts 0383542 (Model 740 1 1 2 30) is a critical safety component designed for emergency pressure relief. This high capacity water pressure relief valve features a rugged 1 1 2 inch FNPT inlet and an expanded 2 inch FNPT outlet, specifically engineered to handle massive discharge volumes in hot water space heating applications. With a fixed pressure setting of 30 PSI and a substantial steam relief