This is a self-guided study of Chapter 9 of the Uniform Plumbing Code. An advantage of this type of study is that you can work at your convenience and at your own pace. Chapter 9 deals with the subject of vents. The correct installation of vent components and systems insures that the drainage system will flow properly, it will reduce possible future system problems, and it will protect the health of the building's occupants. This chapter is one of the corner stones that the Uniform Plumbing Code is built upon. The understanding of venting requirements is an essential element of plumbing. This class has been approved by the Iowa Plumbing and Mechanical Systems Board for two hours of plumbing code.