4420 - HEAT EXCHANGERS AND STEAM CONDENSERS
4510 - PLUMBING FIXTURES AND ACCESSORIES
4710 - NO DESCRIPTION AVAILABLE
4720 - HOSE AND FLEXIBLE TUBING
4730 - NO DESCRIPTION AVAILABLE
4810 - VALVES, POWERED
4820 - VALVES, NONPOWERED
5130 - HAND TOOLS, POWER DRIVEN
5330 - PACKING AND GASKET MATERIALS
5430 - STORAGE TANKS