- Wallpaper & Wall Coverings, West Haven
- Warehousing & Storage, West Haven - Warehouse Services
- Washing Machine & Dryer Repair & Service, West Haven
- Waste & Refuse Services & Sites, West Haven
- Waste Disposal, Garbage, Trash & Rubbish Removal Contractors Equipment, West Haven
- Waste Management, Waste Sanitation & Safety Equipment, West Haven
- Waste Water Treatment, West Haven
- Water Filters & Purification Systems, Equipment & Supplies, West Haven - Water Filtration Systems Companies
- Water Transportation, Except Passenger, West Haven
- Water, Sewer & Utility Line Contractors, West Haven - Installation & Repair Services
- Waterproofing Materials, West Haven
- Weight Loss & Control Programs, West Haven
- Welding & Welder, West Haven - Welding Supplies, Machines, Equipment, Services & Contractors
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- Welding Supplies & Equipment, West Haven
- Wholesale Distributors Franchises, West Haven
- Windows and Doors, West Haven - Wholesale, Manufacturers & Suppliers
- Wire, Cable & Rope, West Haven
- Wireless & Cellular Communications Equipment & Supplies, West Haven
- Women s Clothing Stores, West Haven - Clothes & Accessories
- Womens Dresses, West Haven
- Wood Carving & Turning Manufacturers, West Haven
- Wood Products Manufacturers, West Haven
- Woodworking Contractors, West Haven - Carpentry Contractors
- Word Church, West Haven
- Work, Utility & Commercial Vehicle Dealers, West Haven
- Wrecking & Demolition Contractors, West Haven - House & Building Demolition Companies
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