13 essential fittings for boiler

1. two or more safety valves

2. two water gauges

3. a steam pressure gauge

4. a blow down valve or cock

5. two feed pump or alternatively one feed pump and one injector

6. a main steam stop valve

7. a feed check valve

8. an inspector's test pressure gauge attachment

9. a fusible plug

10. a low water alarm

11. a low water fuel cut out

12. the manufacturer's maker name plate

13. a registration plate