- Water heaters, except electric (1)
- Water purification equipment (6)
- Water softeners (3)
- Heating equipment (hydronic) (7)
- Fireplaces, prefabricated (1)
- Furnaces, except electric and warm air (1)
- Gas burners (1)
- Oil burners (1)
- Plumbing fittings and supplies (13)
- Pipes and fittings, plastic (5)
- Plumbers' brass goods and fittings (1)
- Plumbing and heating valves (2)
- Stoves, wood burning (2)
