Watts Lead Free Series 77F-CSI Cast Steel Flanged Wye Strainer Series 77F-CSI Steel, Flanged, Wye-Pattern Strainers are used in liquid and steam applications. Series 77F-CSI are furnished with blowdown connections and machined seat that allows the screen to be self-aligning and assures a perfect fit. All sizes come with a complete bolted screen retainer cover and PTFE gasket. Screen retainer cover is tapped for strainer clean out by removing the blowdown plug or opening a blowdown valve piped to the blowdown outlet. The strainer may be installed inhorizontal or vertical pipe with the blowdown connection at the lower end of the screen retainer cover. Features: • Grade WCB steel body • Wye-pattern • Self-aligning stainless steel screen • Screen retainer cover tapped and plugged • Flanged connections