This is an easy-to-understand, yet thorough introduction; it is backed by the expertise of an experienced author and gives a great overview of plumbing and central heating. I once thought a non-professional such as me would never be able to wrap his head around a topic this practical, but I am pleased to have been proven wrong. I would recommend this book to anyone who wants to be able to deal with minor plumbing problems themselves, and to those who want to understand better what professionals do and how the plumbing system works. This introduction is especially good because it gives you the logic behind how and why things are done, and it discussed the hydraulics behind them (such as the concept of a "water hammer", which anyone interested in physics should know about, but so far I am yet to find a single scientist who knew about it).