Supporting reliable hydronic zoning, the ZSR103 integrates three pump zones into one intelligent control module that streamlines wiring and system management. Priority zoning, LED diagnostics, and built-in transformer capacity deliver consistent performance in radiant, baseboard, or multi-zone hot-water systems. Its compact enclosure mounts cleanly in mechanical spaces and simplifies troubleshooting for installers and technicians.

Weight	5.07 lb
Height	6.00 in.
Length	6.00 in.
Width	6.00 in.
Inventory Number	CALEZSR103
MPN	ZSR103