UNSPSC 40171900: Pipe backup flanges

UNSPSC 40171900 Pipe backup flanges is a Class code covering replacement and repair fittings for sanitary sewer systems, including wyes, tees, and related pipe connection components. State and local governments buy these fittings as part of sewer infrastructure rehabilitation and mainline extension projects. Recent solicitations show county sanitation districts and transportation authorities requesting these components alongside pipe replacement, pipe bursting, and sewer extension work. The work typically involves removal and replacement of aging vitrified clay pipe and cast iron infrastructure with modern PVC and HDPE materials, with fittings sized to match the new pipe diameters and service connection configurations.

Santa Clara County appears as the primary issuing body in recent activity, with two ITBs posted between April and August 2026. County Sanitation District No. 2-3 issued ITB ITBRDAFY270088 on August 26, 2026 (due September 17, 2026) for the Structural Defect Repair Project Phase 2, which includes twenty-seven 4"×6" wyes, two 4"×8" wyes, and two 4"×10" wyes as part of thirty-five point repairs and two mainline extensions in the unincorporated eastern foothills. Santa Clara County Transportation Authority issued ITB ITBRDAFY260694 on April 29, 2026 (due May 21, 2026) for the Central Expressway Pavement Rehabilitation Project, though that solicitation emphasized roadway components rather than sewer fittings. Activity under the code is currently concentrated in California, specifically in Santa Clara County's sanitation infrastructure programs, with a focus on unincorporated service areas requiring VCP and cast iron replacement across multiple diameter ranges.