High Pressure Water Jetting Operator Manual Hints, Tips and How to use and care for water jetting equipment safely. The text is simple and easy to understand, the essential calculations used require only the ability to use a $5 calculator. The book is well worth reading and will make a great aid to training. Tim has been working with high pressure water for more than 45 years. Beginning his operating career in high pressure water jetting underwater as an oilfield diver undertaking non destructive testing, onto marine cleaning, tube and pipe cleaning to technical author for numerous operating and safety manuals for the industry, contractor and certificated Quality Assurance Lead Auditor, certificated Work Place Inspector and Trainer. All these skills were applied to the water jet industry giving him a valuable broad experience base from which he drew the information to write this book. Used Book in Good Condition