9 Metered Chemical Feed Units and Automatic Controlled Water Softening Units
11 Water Treatment Apparatus Specifically, Manual Filters, Automatic Filters, Water Sterilizer Units, Pressure Regulating Tanks, Reverse Osmosis Units, Distillation Units, and Water Softening Units
37 Installation, Maintenance and Repair of Water Treatment Apparatus, Diagnostic Services for Water Supply Systems, and Plumbing Services
No claim is made to exclusive use of "Water" apart from the mark as shown. The lining forming the background of the central portion of the drawing is meant to indicate the color blue.