Healthy Homes, Part 9: Plumbing Course

Welcome to InterNACHI's free, online Healthy Homes, Part 9: Plumbing Course.  This is part 9 of a 14-part Certified Healthy Homes Inspector certification program provided by InterNACHI to members for free. 
The goal of this course is to teach students about healthy plumbing systems in a home. Students will learn an overview of various components and systems in plumbing.
Upon successful completion of this course, the student will be able to:
  • identify systems and components of plumbing;
  • distinguish between various types of plumbing material;
  • discuss advantages of hot and cold-water piping;
  • discuss safety guidelines and danger prevention for plumbing systems;
  • identify safety valves and controls;
  • identify drainage components;
  • list ways in which to conserve water and money;
  • perform an inspection related to water supply systems and components; 
  • generate observations related to inspecting water supply systems and water quality; and 
  • produce written reports related to observations conducted at a house.

Course Includes:
  • 21 InterNACHI CE credits
  • 2.1 CEU
  • 10,535 words
  • 20 quiz questions in four quizzes
  • Inspection and writing assignment
  • Research and writing assignment
  • 30-question final exam
  • Certificate of Completion
You will learn the following topics:
  • Basic elements and definitions of plumbing
  • Water service
  • Hot and cold water main lines
  • Piping materials
  • PVC
  • CPVC
  • Copper
  • Galvanized steel
  • PEX
  • Kitec
  • Poly
  • Polybutylene
  • Hot water safety
  • Water flow controls
  • Shutoff valves
  • Check valves
  • Flow-control valves
  • Relief valves
  • Pressure-reducing valves
  • Altitude valves
  • Foot valves
  • Frost-proof valves
  • Frost-proof hydrants
  • Float valves
  • Miscellaneous switches
  • Water heaters
  • Tankless water heaters
  • Sanitary drainage systems
  • Traps
  • Ventilation
  • Total drainage system
  • Corrosion control
  • Water conservation
  • Saving money
  • EPA tips
  • Putting it all together
 This course has been approved by:

Healthy Homes, Part 9: Plumbing Course

Course # 4816



Estimated hours for the average student

Academic Engagement

Reading online course instructional material at 140 words per minute


Taking quizzes 


Taking the exam


Conducting a directed and independent inspection study performed according to the Standards of Practice, including the development of an inspection report 


Submitting an inspection and writing assignment

Submitting a research and writing assignment 0.5




Studying and reviewing instructional material in preparation for taking quizzes and exam 


Reading the downloaded student course book including taking the quizzes with the book 1.0
Reading, research, and studying related to completing the research and writing assignment 1.0
Studying and preparing for inspection processes according to a Standards of Practice, including capturing and storing digital images with a camera or device, making observations, evaluating conditions, deducing, formulating opinions, communicating observations in written form, attaining competency in performing inspections and using an inspection checklist or software and other inspection tools in producing a report. 10.0



Sub Total


Overall Total

21 hours

2.1 CEU

And, in keeping with InterNACHI's commitment to Continuing Education, this online course is open and free to all members, and can be taken again and again, without limit.
Reminder to members:  InterNACHI's Code of Ethics 1.10 requires that you comply with all government rules and licensing requirements of the jurisdiction where you conduct business.  InterNACHI's courses and Standards generally exceed the Standards of Practice that you are required to abide by locally.