ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN making it easy to set

making it easy to set and adjust temperature parameters as needed

this L-Handle provides a secure and precise grip for tightening and loosening hexagonal fasteners

this flame rod is a perfect replacement for worn or damaged components

16W power output

Its compact size and lightweight design facilitate easy installation and maintenance

ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN making it easy to setCaleffi Zone Pump Relay (ZSR103) The Caleffi ZSR103 Zone Pump Relay provides precise control and sequencing for up to three zones in hydronic heating and cooling systems. Its compact design and easy to use interface make it ideal for both residential and commercial applications. Key Features: Controls up to three zones independently Adjustable time delays for pump sequencing LED indicators for clear status monitoring Built in dry contacts for remote