ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN It is sweat-compatible

It is sweat-compatible

Its precise design conforms to OEM standards

The limit switch

it offers exceptional durability and reliability in harsh industrial environments

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

ZSR103 | Zone Pump Relay 3 Zone | Caleffi Size_19-1/2IN It is sweat-compatibleCaleffi 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