23 2200 - Steam and Condensate Piping
See also: 22 1053 - Metallic Piping & Fittings
- Armstrong International
- Mueller Steam Specialty - Check valves, butterfly valves, suction diffusers, three-way combination valves, and line blinds.
- Richards Industries - Bestobell, Jordan Valve, Marwin Valve, Hex Valve,
Steriflow Valve and Lowflow Valve
- Spence Engineering Co. - includes Nicholson Steam Trap
- Watts - Water safety & flow control products, backflow prevention devices, water quality & conditioning products, and specification drainage products.
- Wheatland Tube Company, a division of Zekelman Industries