Isometric Drawings for the Florida Plumbing Contractor License

The multiple-choice portion of the Plumbing Trade Knowledge exam will consist of questions relating to general trade knowledge. The content areas to be covered are the following:

  1. 20% Drainage
  2. 20% Water Distribution
  3. 15% Natural Gas Piping
  4. 20% Medical Gas Piping
  5. 10% Industrial Piping
  6. 5% Swimming Pools, Wells and Irrigation
  7. 5% Solar
  8. 5% Fire Protection

The Isometric Drawing portion of the Plumbing Trade Knowledge exam will require you to provide 5 plumbing isometric drawings. The content of the drawings will correspond to the areas listed above 1 through 8. The following information is the criteria and points used by the graders to evaluate each drawing:

  • Legibility. All drawings are clear and readable. Lines and labels are recognizable. (8 points)
  • Orientation. Fixtures need to show in the correct location relative to each other. (20 points)
  • Flow. The direction of flow will not be shown when going from vertical to horizontal. The direction of flow must be indicated even if the direction is implied for all waste lines and all fixture connections. (12 points)
  • Angles. Isometric drawing uses 30-60-90 degree angles. All drawings provided need to be shown at the appropriate orientation. (8 points)
  • Piping. All pipes, fittings, traps, clean-outs, and similar portions of the piping structures will be included in the drawing. (20 points)
  • Labeling. All fixtures need to properly labeled according to the legend provided in the exam. (4 points)
  • Vents. All vents need to be indicated. (16 points)
  • Fixtures. All fixtures need to be indicated. (12 points)


# ruben meneses 2020-08-06 09:33
isometrics course,Do offer it?
# Contractor Licensing Experts 2020-08-06 10:22
We do provide a module dedicated to Isometrics within our Plumbing Contractor Course, it will cover the information which is needed to pass your exam.
# Sean Hopkins 2023-04-09 22:29
Wanna learn how to draw plumbing isometrics
# Claudia Soto 2023-04-10 09:54
Hello Sean,
Our Plumbing Contractor course provides a module dedicated to Isometric Drawing, which is Workout Questions. In that module, you must draw five drawings. The content of the drawings will correspond to the areas listed above, 1 through 8:
20% Drainage
20% Water Distribution
15% Natural Gas Piping
20% Medical Gas Piping
10% Industrial Piping
5% Swimming Pools, Wells, and Irrigation,
5% Solar
5% Fire Protection
We have the books and classes to prepare you for the Florida Plumbing Contractor license's trade and business exam. With our courses, you can register the same day you purchase, and you will be able to jump right into the isometric module.

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