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| 890 01 | AIR FLOTATION SYSTEMS, WATER TREATMENT REMOVAL OF HYDROCARBONS |
| 890 02 | ACTIVATED CARBON SYSTEMS, EQUIPMENT, AND ABSORBERS |
| 890 03 | BACK FLOW PREVENTERS FOR WATER AND SEWER PIPE |
| 890 04 | BAR AND TRASH SCREEN EQUIPMENT, INCLUDING PARTS AND ACCESSORIES |
| 890 05 | BELT FILTER PRESS, INCLUDING PARTS AND ACCESSORIES |
| 890 06 | BIOROUGHING SYSTEMS, INCLUDING PARTS AND ACCESSORIES |
| 890 07 | CENTRIFUGES, WATER TREATMENT |
| 890 08 | CHLORINATION EQUIPMENT, INCLUDING PARTS AND ACCESSORIES |
| 890 13 | CLARIFIERS AND SETTLERS, SEPARATORS |
| 890 15 | COMPLETE WATER TREATMENT SYSTEMS, CHEMICAL |
| 890 16 | COMPLETE WATER TREATMENT SYSTEMS, NONCHEMICAL: ULTRAVIOLET WATER SUPPLY STERILIZATION, ETC. |
| 890 17 | CONTAMINATED GROUNDWATER TREATMENT EQUIPMENT |
| 890 19 | CRUSHERS, GRINDERS, SIZE REDUCTION EQUIPMENT, ETC. |
| 890 20 | DEMINERALIZERS: REVERSE OSMOSIS, ETC. |
| 890 21 | DESLUDGING EQUIPMENT, INCLUDING PARTS AND ACCESSORIES |
| 890 22 | DESALINATION EQUIPMENT, WATER TREATMENT |
| 890 23 | ELEMENTS, PRIMARY, FLOW, PRESSURE, TEMPERATURE, ETC. |
| 890 24 | FILTRATION EQUIPMENT, WATER INCLUDING PARTS AND ACCESSORIES |
| 890 25 | FLUORIDATION EQUIPMENT |
| 890 27 | INCINERATORS, SLUDGE, INCLUDING PART AND ACCESSORIES |
| 890 28 | INSTRUMENTATION EQUIPMENT, ACTUATORS, ANALYZERS, REGULATORS, CONTROLLERS, TRANSDUCERS, ETC., INCLUDING PARTS AND ACCESSORIES |
| 890 30 | MANHOLES, AND MANHOLE COVERS, FRAMES, GRATES, RINGS, YOKES, ETC. |
| 890 31 | MANHOLE RISERS, STEEL EXPANDABLE |
| 890 35 | METAL FINDERS AND DETECTORS, PIPE LOCATORS, ETC. |
| 890 40 | METER BOXES, METER VAULTS, AND VALVE BOXES (SEE 210-45 FOR CONCRETE TYPE) |
| 890 44 | METERS, WATER |
| 890 45 | METER FITTINGS, WATER, INCLUDING PARTS AND ACCESSORIES, AND CONVERSION KITS |
| 890 46 | METER READING DEVICES |
| 890 47 | MIXING AND AGITATION EQUIPMENT |
| 890 48 | OIL SKIMMING EQUIPMENT, INCLUDING PARTS AND ACCESSORIES |
| 890 49 | OZONE AND OXYGEN GENERATING EQUIPMENT, INCLUDING PARTS AND ACCESSORIES |
| 890 50 | RINGS AND SEALS, CARBON, TURBINE SHAFTS |
| 890 51 | ROOT CUTTING EQUIPMENT, SEWER LINES |
| 890 52 | REMOVAL EQUIPMENT, WATER TREATMENT: AMMONIA, BACTERIAL, IRON, ETC. |
| 890 53 | SEPARATION AND TREATMENT EQUIPMENT, OIL/WATER |
| 890 63 | SEWER ANALYZING, MONITORING, PROBE AND RELATED EQUIPMENT |
| 890 64 | SEWER INSPECTION EQUIPMENT |
| 890 65 | SEWAGE AND WASTE TREATING EQUIPMENT AND SUPPLIES |
| 890 66 | SEWER LIFT STATIONS, INCLUDING PARTS AND ACCESSORIES |
| 890 67 | SOLVENT, CHLORINATED RECOVERY SYSTEM |
| 890 68 | TAGS, WATER METER REMOVAL |
| 890 69 | SUMPS, PARTS, AND ACCESSORIES (SEE 720-73 FOR SUMP PUMPS) |
| 890 70 | SWITCHES, PRESSURE, FLOW, LEVEL, PROXIMITY, TEMPERATURE, ETC. |
| 890 72 | TAPPING MACHINES AND EQUIPMENT |
| 890 74 | TRANSMITTERS, PRESSURE, FLOW, LEVEL, ETC. |
| 890 75 | VALVE OPERATORS, INCLUDING PARTS AND ACCESSORIES AND TOOLS (SEE 515-82 FOR LAWN SPRINKLER TYPE) |
| 890 76 | VIRUS AND BACTERIA INACTIVATION, OZONE TYPE EQUIPMENT (SEE 493-05 FOR AIRBORNE TYPE) |
| 890 77 | WASTE WATER RECLAMATION SYSTEMS, INCLUDING PARTS AND ACCESSORIES |
| 890 78 | WATER FILTERS AND FILTER ELEMENTS, EXCEPT BOILER, PHOTOGRAPHIC DARKROOM, AND SWIMMING POOL: CARTRIDGES, ETC. |
| 890 79 | WATER AND WASTEWATER DISINFECTING OZONATORS |
| 890 80 | WATER LEAK DETECTION SYSTEM, INCLUDING CHEMICALS, DYES AND SUPPLIES |
| 890 81 | WATER MAIN CLEANING EQUIPMENT |
| 890 82 | WATER SCREENS AND PARTS, TRAVELING |
| 890 83 | WATER PURIFICATION SEPARATORS |
| 890 84 | WATER ODOR CONTROL EQUIPMENT |
| 890 85 | WATER SOFTENING EQUIPMENT, ION EXCHANGE TYPE (ALSO SEE 670-92,93) |
| 890 86 | WATER SYSTEMS, ULTRA PURE |
| 890 87 | WATER TREATMENT EQUIPMENT (NOT OTHERWISE CLASSIFIED) |
| 890 88 | WATER RIGHTS (INACTIVE, EFFECTIVE JANUARY 1, 2016) |
| 890 89 | WELL POINTING SYSTEMS, INCLUDING PARTS AND ACCESSORIES |
| 890 95 | RECYCLED WATER SUPPLY, GROUNDWATER AND SEWAGE TREATMENT EQUIPMENT, INCLUDING PARTS AND ACCESSORIES |