Taco Sr501 Single Zone Hot Water Circulator Switching Relay

The Taco SR501 Switching Relay”s layout makes short work of any job. Its snap-in PC board easily replaces other single zone switching relays, without replacing the entire box. The single zone switching relay is UL and CSA listed, uses a standard ice cube replaceable relay and is compatible with conventional and programmable thermostats. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups. Replaces the Honeywell R845A and similar relays.