23 2120 - HVAC Pumps
See also: 22 1150 - Plumbing Pumps
- Ace Pump Corporation
- Albany Pump Company - Manufacturers of fuel oil transfer packages and excess pressure pumps.
- Alyan Pump
- AMT
- American-Marsh Pumps
- Ampco Pumps Company
- Armstrong Pumps - Vertical inline pumps
- Aurora Pump
- Blackmer
- Buffalo Pump
- Canariis Corporation
- Capital City Tool
- Carver Pump Co.
- Cat Pumps - High pressure industrial reciprocating triplex plunger pumps and custom power unit up to 320GPM, 7000 PSI.
- Cornell Pump Company
- Crane Pump and Systems - Demming Pumps, Barnes Pumps, Weinman Pumps
- Dean Pump Div., Met-Pro Corp.
- Dickow Pump Company
- Discflo Corporation
- Edson International, Pump Division
- Envirosep - Integrating industrial and commercial applications of custom fluids handling, heat transfer, and energy recovery systems.
- Fairbanks Morse
- Flowserve - Aldrich, Byron Jackson, Durco, Flowserve, IDP, Pacific, Pleuger, Scienco, Sier-Bath, TKL, United, Western Land Roller, Wilson-Snyder, Worthington
- Gorman-Rupp Company
- Goulds Pumps
- Griswold Pump Company
- Grundfos Pumps Corporation U.S.A.
- Hartell Pumps
- Hayward Industrial Products
- ITT Bell & Gossett
- ITT Industries - Flowtronex PSI
- ITT Industries - Flygt
- ITT Laing Thermotech
- Little Giant Pump Company
- March Manufacturing
- A.Y. McDonald Mfg. Co.
- MEPCO, Marshall Engineered Products Co.
- Moyno
- Noriseal
- Oberdorfer Pumps
- PACO Pumps
- Peerless Pump Company - An engineered, assembled and tested Peerless packaged system can be designed for your specific requirements.
- Pentair Pump Group
- Reddy-Buffaloes Pump Company
- Roth Pump Company
- Scot Pump
- Sims Pump Valve Co.
- Skidmore
- Smith and Loveless
- Sulzer Pumps (US)
- Sundyne Corporation
- Swaby Manufacturing Company
- SyncroFlo
- Systecon
- Taco - Hydronic systems and components
- Thrush Company
- TIGERFLOW Systems
- Watson-Marlow Bredel
- Wilden Pump & Engineering Company
- Yamada America