ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN and extra heavy cast iron

and extra heavy cast iron - Dimensions: 3-inch diameter

Its compact size and lightweight design facilitate easy installation and maintenance

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

it offers exceptional durability and reliability in harsh industrial environments

The limit switch

ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN and extra heavy cast ironCaleffi 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