Watts Model TK-9A Backflow Preventer Test Kit is a compact portable device made for testing all types of backflow preventer assemblies, including, RPZ, DC, PVB and SPVB to USC and ASSE 5000 Standards. The Watts TK-9A comes with adapter fittings to easily connect to all testable assemblies. Rugged weatherproof gauge design with durable 600 PSI ball valves for on/off use, and needle valve for precise metering. Accuracy is +/- 2%. In the box: Watts TK-9A backflow test kit, 4.5" Differential Pressure Gauge - scale: 0 -15 PSID, 3-PC set backflow test hoses (3'), 3-PC set backflow testcock adapters (1/4 in.), 1 carrying bag