Pool, spa and related component categories
| Category code | Category name |
| WAGN | Blowers |
| WAWU | Controls |
| WBAH | Covers for Swimming Pools and Spas |
| LSEV | Gas-fired Swimming Pool and Spa Heaters |
| WBRR | Heaters |
| WBYQ | Hot Tub and Spa Equipment Assemblies |
| NCHX | Hydromassage Bathtubs |
| WCEZ | Junction Boxes |
| WBDT | Luminaires and Forming Shells |
| LSHW | Oil-fired Swimming Pool and Spa Heaters |
| WCKA | Ozone Generators |
| QMTX | Plumbing Accessories |
| WCNZ | Pool and Spa Equipment Classified in Accordance with NSF 50 |
| WCSX | Pumps |
| REUZ | Pumps, Electrically Operated, Liquid |
| UDGJ | Residential Water Hazard Entrance Alarms |
| WCZW | Self-contained Spas |
| IFEV | Submersible Luminaires |
| WEBT2 | Suction Fittings for Self-contained Spas, Hot Tubs and Hydromassage Bathtubs |
| WEBS | Suction Fittings for Swimming Pools, Wading Pools, Spas and Hot Tubs |
| WDDJ | Swimming Pool and Spa Cover Operators, Electric |
| WDUT | Swimming Pool and Spa Equipment, Miscellaneous |
| WDGV | Swimming Pool and Spa Transformers |
| ZDUZ | Water Softeners, Demineralizers and Water Treatment Units |
| WDLC | Water Treatment Equipment |
