This book is a need item to help trouble shoot problems with boiler, DA tanks, condensate return tanks,pumps, and piping. If you can see the problem, you will probably see a picture of the problem in this book along with what caused it...and in color 95 percent of the time. It has been a real life saver, literlly. You gotta have this book even if you only use it once..it could save your life, or your building/s. Try it ..you will like it. My instructor in 2 grade class was so impressed it got one.
