Mathematics for Plumbers and Pipefitters by Lee Smith, 8ed (English, Paperback).
A nice touch in this textbook is the quick start guide for each chapter.
*Mathematics for Plumbers and Pipefitters 8th Edition Paperback – 9781111642600
What stands out about this textbook is the use of analogies to explain concepts.
Mathematics for Plumbers and Pipefitters by Lee Smith, 8ed (English, Paperback)
You will find that this textbook is well suited for self-study or classroom use.