NIGP 03153: Grilles, Diffusers, Registers, etc.

NIGP 03153 Grilles, Diffusers, Registers, Etc., an Item code, covers specialized aeration and dechlorination diffusers procured by state and local water utilities for treatment infrastructure. State and local governments buy diffusers for wastewater treatment facilities (aeration diffusers, diffuser accessories, membrane components) and potable water systems (dechlorination diffusers, aeration equipment). Recent solicitations show procurement of both OEM equipment and replacement parts, often tied to proprietary systems where compatibility with existing facility infrastructure drives vendor selection. Issuing bodies are primarily municipal water utilities and water reclamation departments, typically operating within city or county water authorities. The City of Tampa Water Production Department, the Plant City Water Reclamation Facility (Hillsborough County), and the City of Charlotte transit authority (CATS boiler and chiller systems) represent active recent buyers in this space.

Florida municipal water utilities dominate recent activity under this code. The City of Tampa issued RFQ 26P00599 on October 9, 2026, requesting Pollard Water dechlorinating diffuser components (response due October 15, 2026) and separately issued a single-source procurement 26X01454 for SANITAIRE diffused aeration equipment and replacement parts from Xylem Water Solutions USA, Inc., valued at $150,000. The City of Plant City issued a Notice of Intent to sole-source EDI diffuser products from Environmental Dynamic International for the Plant City Water Reclamation Facility, with a contract value of $37,975.00 and individual line items ranging from $975.00 to $18,750.00 (response deadline February 10, 2026). The City of Charlotte solicited boiler and chiller maintenance services (RFP 26920271769, due October 15, 2026) covering chiller aeration equipment at CATS facilities, though this posting omitted contract value and specific evaluation criteria. Geographic activity centers on Florida and North Carolina in recent months, with Sourcewell's cooperative purchasing vehicle (RFP 061626) extending law enforcement equipment availability nationwide through multiple jurisdictions including Washington state counties.