Taco SR504 4-Zone Switching Relay W/Priority

The Taco SR504 4-Zone Switching Relay used as a solution for effective multiple heating zone control in hydronic heating systems. The part provides independent zone control for four heating areas to direct heat exactly where it is required. The part includes external diagnostic indicator lights with switchable zone priority controls for domestic hot water and simplified wiring which makes installation easier. The part operates effectively with standard and advanced thermostat models for improved comfort while maximizing energy efficiency coupled with simplified HVAC system configuration across residential buildings as well as small commercial settings. ​