a Marley 4520-2030-000 trips due to restricted airflow

Key Benefits Dual-Detector Management: Allows for the independent testing and simultaneous reset of two linked duct smoke detector sensors from a single location

Hermetic Design: The 1/4" ODF sweat connections eliminate potential leak points associated with flare fittings

Structural Integrity: Features a convex disc configuration for added strength and high-speed stability

Conbraco 10-604-12 Relief Valve Els PW 17895 a Marley 4520-2030-000 trips dueThe Conbraco 10 604 12 is a high capacity ASME Section IV safety relief valve designed specifically for hot water heating boilers and hydronic heating systems. Featuring a 3 4" MNPT inlet and a 3 4" FNPT outlet, this bronze bodied valve is factory set at 60 PSI. With a certified heat dissipation capacity of 1,399,000 BTU hr, it provides reliable overpressure protection for commercial and industrial water heating equipment. The corrosion resistant EPDM