Table 1: Typical Equipment Life Expectancy
Equipment Life Expectancy in Years. Structures 30 60 Equipment 10 15 Chlorination Equipment 10 15. Transmission/Distribution. Equipment Life Expectancy in Years. Structures 30 60 Reservoirs and Tanks 30 60 Mains amp; Distribution Pipes 35 40 Services 30 50 Valves 35 40 Backflow Prevention Valves 35 40 Blowoff valves 35 40 Meters 10 15 Hydrants 40 60.