46 66 00 Ultraviolet Equipment
46 66 16 Closed-vessel Low-pressure/High-intensity Ultraviolet Treatment Equipment
46 66 13 Closed-vessel Low-pressure/Low-intensity Ultraviolet Treatment Equipment 46 66 16 Closed-vessel Low-pressure/High-intensity Ultraviolet Treatment Equipment 46 66 23 Closed-vessel Medium-pressure Ultraviolet Treatment Equipment 46 66 53 Open-channel Low-pressure/Low-intensity Ultraviolet Treatment Equipment 46 66 56 Open-channel Low-pressure/High-intensity Ultraviolet Treatment Equipment 46 66 63 Open-channel Medium-pressure Ultraviolet Treatment Equipment