18. Don’t fail, while cleaning the boiler, to examine and clean all cocks, valves and pipes and look to all joints and packings.
19. Don’t commence cleaning the boiler until it has had time to cool.
20. Don’t forget daily to see that the safety-valve moves freely and is tight.
21. Don’t fail to clean the boiler inside frequently and carefully.
22. Don’t fail to notice that the steam gauge is in order.
23. Don’t fail to keep an eye out for leaks and have them repaired immediately, no matter how small.
24. Don’t fail to empty the boiler every week or two and re-fill it with fresh water.
25. Don’t let any air into the furnace, except what goes through the grate-bars, or the smoke burners, so called, by which the air is highly heated.
26. Don’t increase the load on the safety-valve beyond the pressure allowed by the inspector.