What is the difference between the 392877 and the 392877/U

While designed for hot water at 90 PSI

a TC-4 test cock is recommended to facilitate periodic testing and blow-down

such as a high-level alarm

Rugged Construction: Steel enclosure with knockouts simplifies conduit banking and protects internal components from debris

Watts 0385496 Tester R-410A What is the difference betweenProfessional field testing of backflow prevention assemblies requires precision equipment that holds up to the rigors of the job site. The Watts 0385496 TK 9A Backflow Preventer Test Kit is the industry standard for verifying the performance of Reduced Pressure Zone (RPZ) assemblies, Double Check Valve Assemblies (DCVA), and Pressure Vacuum Breakers (PVB). Engineered for backflow testing compliance with ASSE 5000 and USC standards, this analog