NIGP 27135: Filter Sets and In-Line Filters

NIGP 27135 Filter Sets And In-Line Filters, an Item code, encompasses consumable and replacement filters for municipal water treatment, wastewater systems, air handling, and industrial processes. State and local governments purchase these filters through competitive sealed bidding and request-for-quote notices, typically in high-volume standing contracts that cover multiple filter types and performance ratings. Recent solicitations show procurement of HVAC pleated air filters meeting ASHRAE MERV standards, dust-collector bags for water treatment lime delivery systems, and venturi-type flow controllers paired with butterfly valves for potable water regulation. Issuing bodies include city departments of public purchases, municipal water utilities, county utilities authorities, and school districts requesting filters for facility maintenance and water treatment operations. The mix skews toward mid-sized cities and county utilities rather than state-level procurement, with multi-year firm-fixed pricing typical and deliveries tied to purchase order issuance.

Recent activity shows geographic concentration in the Southeast and South, with solicitations from the City of Bridgeport, Connecticut; City of Tampa, Florida; Pinellas County Utilities in Florida; and City of Lubbock, Texas. The City of Bridgeport Department of Public Purchases issued ITB BMB005277 on July 23, 2026, for air filters covering five product lines (AEROPLEAT IV, GEOPLEAT, AEROPAC, and AIRFLOW PLEAT M10) with firm fixed pricing through 2029 and a two-year extension option. The City of Tampa issued RFQ 26P00453 on July 17, 2026, for Donaldson dust-collector bags for its water treatment plant lime delivery system. Pinellas County Utilities posted ITQ 26-0647 on June 30, 2026, for Invent Mixer Parts & Accessories, referencing a prior blanket purchase agreement. The City of Lubbock issued ITB 26-19653-YB on May 27, 2026, for a 16-inch rate of flow controller and butterfly valve assembly for the North Water Treatment Plant, with a non-mandatory site visit on May 20, 2026, and sealed-bid submission via electronic portal or hand delivery. Contracts in this code typically run three to five years with options to extend and often include local bidder preferences where applicable.