WL350ASTDARA-OSY-4, 4 IN 350 ASTDA with OSY gate valves and a spool piece

This 4 inch Zurn Wilkins 350 ASTDA Double Check Detector Assembly protects against both backsiphonage and backpressure in low health hazard, fire protection applications. Its stainless steel body, access covers, internals, fasteners, and springs are corrosion-resistant for reduced maintenance costs. Featuring a metered bypass system, the 350ASTDA efficiently detects leaks and any unauthorized water use. Its single access cover reduces downtime and added costs associated with maintenance and repairs. The 350ASTDA features a short lay-length for compact, versatile installation in horizontal or vertical positions, and is available in a variety of flanged, grooved, or grooved x flanged end connections. It also comes wit a built-in spool piece.