- Wallpaper Installation Contractors, Northumberland - Wallcovering Installation
- Warehousing & Storage, Northumberland - Warehouse Services
- Waste & Refuse Services & Sites, Northumberland
- Water Coolers & Water Companies - Bottled & Bulk, Northumberland
- Water Filters & Purification Systems, Equipment & Supplies, Northumberland - Water Filtration Systems Companies
- Water Hauling Service, Northumberland - Water Delivery
- Water Treatment & Conditioning Systems, Equipment & Supplies, Northumberland - Water Softener Companies
- Water Well Drilling Contractors, Northumberland
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- Water, Sewer & Utility Line Contractors, Northumberland - Installation & Repair Services
- Wedding & Bridal Services, Northumberland
- Wedding Supplies & Bridal Shops, Northumberland
- Well Drilling Contractors, Northumberland
- Well Drilling Equipment & Supplies, Northumberland - Water Well & Other Wells
- Wheelchairs, Northumberland
- Wheelchairs Ramps, Lift & Scooters, Northumberland
- Wrecking & Demolition Contractors, Northumberland - House & Building Demolition Companies
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