The 2'''' 950XLTBFSS Double Check Valve Assembly, with butterfly shutoff valves and supervisory switches, includes top access check covers for easy maintenance access, and is utilized in low health hazard, non-potable water applications. The 950XLTBF protects against both backsiphonage and backpressure while the test cock plug protects against fouling caused by insects, dirt, and debris. It includes corrosion-resistant stainless steel springs and fasteners. Features of the 950XLTBF include a maximum working water pressure of 175 psi, hydrostatic test pressure of 350 psi, and a maximum working water pressure of 180°F.