Argo 2 Zone Switching Relay with priority

Ice Cube Technology - Plug-in Replacement Relays Switchable Priority - Perfect for Indirect Water Heaters or Priority Zones Auto-Reset Electronic Fuse Protection - Eliminates Nuisance Service Calls 15VA Transformer/Full 1/3HP Relay Load Rating - Robust Components Provide Years of Trouble-free Service 5-Year Warranty - Strongest Protection Available