In the Reznor parts ecosystem

Designed for rigorous industrial environments

OEM Compatibility: Authentic York S1-025-31978-000 ensures exact fitment and electrical alignment with existing control boards

As a genuine Reznor HVAC part

Robust Construction: Built with a moisture-resistant beverage board frame and reinforced pleat stabilizers to prevent collapse under heavy load

Spence E2-2 Valve R-410A In the Reznor parts ecosystemThe Spence E2 2 is a heavy duty 2 inch cast iron main valve engineered for precision fluid and steam pressure regulation. As a pilot operated normally closed valve, the E2 series is the industry standard for contractors managing large scale district heating or industrial steam plants. This Spence E2 Main Valve CI features a single seat design and packless construction to reduce friction and eliminate the need for traditional stuffing box maintenance.