UNSPSC 40173310: Ductile iron pipe nipple

A piece of externally threaded tube used to join two tubes and made from ductile iron.

UNSPSC 40173310 Ductile iron pipe nipple is a Commodity code that covers small-diameter iron pipe fittings used in sanitary sewer infrastructure repair and rehabilitation work procured by state and local water and sanitation districts. State and local governments use this code primarily when bidding sewer mainline and service connection repairs involving pipe replacement, point repairs, and pipeline extensions. The issuing bodies under this code are primarily special-purpose sanitation and water districts operating within counties, such as County Sanitation District No. 2-3 in Santa Clara County, California, which procure these materials as components of larger sewer infrastructure rehabilitation contracts. Work solicited includes removal and replacement of deteriorated vitrified clay pipe (VCP) and cast iron pipe segments with modern alternatives such as PVC and HDPE, along with associated service connection fittings and wyes that connect lateral lines to mainline sewers.

Recent activity concentrates in California, specifically Santa Clara County, where County Sanitation District No. 2-3 posted an Invitation to Bid (ITB) on August 26, 2026 with a September 17, 2026 response deadline for the Structural Defect Repair Project Phase 2, a sewer infrastructure rehabilitation program encompassing thirty-five sanitary sewer mainline point repairs and five mainline pipe-burst replacements requiring removal and replacement of VCP and cast iron pipe across multiple diameters, along with service connection fittings including wyes in 4-inch-6-inch, 4-inch-8-inch, and 4-inch-10-inch configurations. The same county also issued an ITB on April 29, 2026 for the Central Expressway Pavement Rehabilitation Project, though that opportunity focused primarily on roadway pavement and related improvements rather than sanitary sewer materials. Completion timelines are typically compressed — the District requires the sewer project to be completed in sixty-five working days from Notice to Proceed — and physical bid submission to county government centers remains standard.