Copeland Comfort Control (White Rodgers) 1311-102 Zone Valve Els PW 17895 the variation is typically found

the variation is typically found in distributor-specific labeling

then tighten with a 5/8" wrench to approximately 10 lb-ft

though vertical and upright is preferred for optimal coil performance

or GS series thermostats

While both use the same balanced port construction

Copeland Comfort Control (White Rodgers) 1311-102 Zone Valve Els PW 17895 the variation is typically foundThe Copeland Comfort Control (White Rodgers) 1311 102 Zone Valve is a professional grade 3 4" 3 wire 24V zone valve engineered for precision flow control in residential and light commercial hydronic heating systems. As a core component of the 1300 series hydronic zone valves, this model features a self aligning barrel type valve stem and a rugged stainless steel body to resist corrosion and ensure long term reliability in high temperature