Pipe 10 in Ductile Iron

The San Antonio Water System (SAWS) in Bexar County, Texas, is soliciting quotes for 10-inch ductile iron pipe, with quotes due October 30, 2026. Every product must appear on the SAWS Approved Product List dated January 2026 and comply with SAWS Material Standard Specification 05-11, which makes approved-list status the primary eligibility filter.

The specification requires centrifugally cast pipe with push-on or mechanical joints that conform to ANSI/AWWA C151/A21.51, or the latest revision. The governing pressure class for 10-inch pipe is 350 psi. Pipe comes in nominal 20-foot lengths with interior cement mortar lining per ANSI/AWWA C104/A21.4, exterior asphaltic coating, and rubber joint gaskets that meet ANSI/AWWA C111/A21.11. Each length carries AWWA C151 identification markings. Manufacturers must perform quality-control testing and documentation per AWWA C151 Section 51.14. SAWS may subject random lengths to independent laboratory testing at no cost to the manufacturer and may reject the entire order for defects or non-compliance. The attached specification, Pipe Ductile Iron Dec 2011.pdf (222KB, posted October 25, 2026), names American Griffin, U.S. Pipe Company, Clow Water Systems Company, Atlantic States Cast Iron Pipe Company, Pacific States Cast Iron Pipe Company, and McWane Cast Iron Pipe Company as approved manufacturers. The solicitation was posted October 25, 2026.