- Vartek
- Vass Pipe & Steel Co Inc
- Vellano Bros Inc
- Vellano Brothers
- Vellano Brothers
- Vellano Brothers Inc
- Vellano Brothers Inc
- Vellano Brothers Inc
- Vellano Brothers Inc
- Ventura Pipe & Supply
- Vertec Supply Co
- Victor Industrial Pipe Inc
- Victor Pipe & Steel Inc
- Victor Pipe & Steel Inc
- Victory Steel Products
- Victory White Metal Co Inc
- Viking Supply Inc
- W R White Supply
- Walker Poroswall Pipe Co
- Wallace Mechanical Supply Inc
- Warner Supply Inc
- Water & Sewer Products
- Water & Sewer Supply Co
- Water Products Co Of Illinois
- Water Products Inc
- Water Works
- Water Works Inc
- Water Works Supplies Inc
- Water Works Supplies Inc
- Water Works Supply Of Virginia
- Watson Pipe Inc
- Welch Trailers Pipe & Steel
- Wenglar's Pipe & Iron Supply
- Wes-Tex Steel Inc
- West Star Threading Co
- West Texas Culvert Co
- West-Ark Steel & Pipe Inc
- Western Belle Enterprises
- Western Industrial Supply Co
- Western Industrial Supply Co
- Western Industrial Supply Co
- Western Piping Products
- Western Waterworks Supply
- Westside Pipe Co
- Wheatland Tube Co
- Wheeler Municipal Supply Inc
- Wheeler Municipal Supply Inc
- Wheeler Municipal Supply Inc
- Wholesale Drainage Supply Inc
- Wichita Concrete Pipe Inc
- Wichita Winwater Works Co
- Wickham Supply
- Williams Gas Pipeline Transco
- Williams Supply Co
- Williams Supply Co
- Williams Supply Co Inc
- Wilson
- Wilson Supply Co
- Windustrial
- Wisconsin Pipe Trades
- Wit-Way Supply Inc
- Woodland Surplus Pipe & Steel
- Woodland Windustrial
- Woodland Windustrial
- Woods Pipe & Supply
- Wrap Master Inc
- Wyoming Concrete Products Co
- York True Value
- Yost & Yost
- Youngstown Pipe & Supply
