The Watts 740-1-30 is strictly for hot water space heating boilers

improving indoor air quality and temperature distribution

supporting multiple air tools or high-demand pneumatic circuits

It is optimized for use with 750 series

Universal Compatibility: Engineering-matched for Apollo Conbraco 20-series and 21-series water gauge valves using 5/8 inch glass

Carrier HK06MB024 Pressure Switch Freon The Watts 740-1-30 is strictlyThe Carrier HK06MB024 Pressure Switch is a critical safety and operational component designed for precise pressure monitoring in high efficiency HVAC induction systems. This dual pressure switch assembly is factory calibrated to detect specific flue gas pressure differentials, ensuring the draft inducer motor is moving sufficient air for safe combustion. Operating with critical setpoints of 0. 43" WC and 1. 55" WC, the HK06MB024 prevents the furnace