Pumping Away : Dan Holohan Associates, Incorporated : 9780974396088 : 0974396087 : 06 Nov 2015 : I wrote this book to describe the beautiful workings of hydronic heating systems and I tried to use words that made the subject spring to life in a visual way. It's been one of my best-selling books for years. I kept the drawings simple. Even if you've never worked with hydronics before, you'll be able to follow these drawings. The first part deals with boiler-room piping and explains how you can put the discoveries of the late, great Gil Carlson to work for you. If you pipe Gil's way, you'll save time, money and never again have to bleed radiators. Thousands of installers have reported great success by following the principles in the first part of this book. I wish I could take credit but the genius was Gil Carlson's. I just did my best to tell his story in plain English. The second half of the book takes the "Pumping Away" boiler-room piping design and applies it to a delicious menu of pi