Model TK-9A Backflow Preventer Test Kit is a compact portable device made for testing all reduced pressure zone backflow prevention assemblies, double check valve assemblies, pressure vacuum breakers and spill-resistant vacuum breakers to USC and ASSE 5000 Standards. The 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 and off use, and needle valves for precise metering. Accuracy is +/- 2%. The unit includes a shock resistant carrying case for easy handling and accessibility.