NIGP 03173: Pumps, Refrigerant Circulating

NIGP 03173 Pumps, Refrigerant Circulating, an Item code, covers chilled water circulation pumps and associated refrigerant system equipment that state and local governments procure for HVAC maintenance, upgrades, and new installations at facilities including schools, transit systems, and municipal buildings. The code captures both replacement of existing pumps as part of broader chiller system upgrades and standalone pump procurement for equipment optimization and commissioning work.

State and local issuers soliciting under this code span school districts, city transit authorities, and county governments. Anchor Bay School District in Michigan has been the most active recent buyer, issuing two separate IFB notices in May 2026 for chilled water pump upgrades across four elementary schools as part of an energy services performance contract. The City of Charlotte's transit agency (CATS) posted an RFP in September 2026 for boiler and chiller maintenance and repair services that includes pump maintenance and potential upgrades across multiple facilities. Procurement activity concentrates in Michigan and North Carolina in the recent record; the source does not support activity in other states. Anchor Bay's sealed-bid solicitations (RFQABS2600000003082 and RFQABS2600000003083), both due June 11, 2026, specify Bell & Gossett as the basis-of-design pump manufacturer with Taco and Armstrong Fluid Technology as approved alternatives, a 325 GPM chilled water flow capacity on the primary system, dual circulation pumps with automatic failover, variable frequency controllers, and integration with existing building automation via BACnet protocol. Contractors must furnish one-year workmanship warranties, provide 24 hours of formal instruction to district personnel, comply with Michigan prevailing wage rates, and submit 2.5 percent bid security with performance and payment bonds. Charlotte's CATS RFP, due October 15, 2026, seeks certified technicians with access to proprietary parts for Trane, Pulse, Aalon, Carrier, and Lochinvar equipment, including potential upgrades and installations across Charlotte and Mecklenburg County facilities.