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NPT Connections: Standard 1/2 inch threading for fast field installation and compatibility
Use a manometer to measure the actual draft produced by the inducer and compare it against the 0
Direct OEM part fitment ensures standardized mounting with existing 5-inch ductwork ventilation
directly improving HVAC system efficiency and reducing jacket heat loss
Velocity Boiler Works (Crown) 3503025 Relay 321142-301 NPT Connections: Standard 1/2 inchThe Velocity Boiler Works (Crown) 3503025 Relay is a high duty 120V combination relay engineered for precise circuit management in residential and commercial hydronic systems. As a critical boiler replacement part, this component integrates multiple switching functions into a single housing, streamlining the 120VAC electrical path for burners, pumps, and limit controls. Designed specifically for Crown boiler systems, it ensures 60Hz current stability
US$ 49.95
US$ 49.95
US$ 49.95
US$ 129.00