ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN making them a versatile solution

making them a versatile solution for various systems

It is sweat-compatible

Motor General Purpose 1/3 Horsepower 1725 Revolutions per Minute 115 Volt Clockwise Drive End Reversible

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

it offers exceptional durability and reliability in harsh industrial environments

ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN making them a versatile solutionCaleffi 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