a water-rated relief valve (like the Watts 3L or 174A series) must be used

This valve is typically configured for natural gas from the factory

Optimized Airflow: Precision-molded interior volute geometry maximizes induced draft blower efficiency and reduces vibration

it allows for precise adjustment of HVAC mode settings

Common Questions: How do I know if my ASCO valve needs a 302-278 rebuild kit

York S1-025-41349-000 Wiring Harness 319825-402 a water-rated relief valve (likeThe York S1 025 41349 000 Wiring Harness is a critical OEM HVAC replacement part engineered for precise electrical interfacing within residential and light commercial equipment. This 16 pin wiring harness provides the necessary point to point continuity between control boards and system peripherals, ensuring low resistance signal transmission. Designed as a direct drop in for York heating and cooling systems, this harness eliminates the need for field