Watts 0163746 Valve 319847-401 It arrives factory-set at 150

It arrives factory-set at 150 psi and features a durable stainless steel spring and silicone disc to ensure a tight seal and consistent blow-down performance

Key Benefits Direct OEM Compatibility: Verified fit for Carrier

Designed for rapid field replacement on "new style" valve bodies without the need to drain the loop

the manual reset ensures the circuit remains open until the technician verifies gas pressure and manually resets the switch

Enhanced Efficiency: Operates at precise speeds to maximize heat exchange and reduce compressor head pressure

Watts 0163746 Valve 319847-401 It arrives factory-set at 150The Watts 0163746 (Model 1 LL40XL Z2) is a high capacity temperature and pressure relief valve designed specifically for commercial hot water supply tanks and large boilers. Featuring a 1 inch NPT male inlet and 1 inch NPT female outlet, this bronze body valve is engineered for 500,000 BTU hr systems where safety and high discharge capacity are mandatory. The non mechanical seat to disc alignment ensures reliable operation at a pressure relief setting