Commercial Plumbing Inspector Exam Information

The exam is open book, and the passing score is 70%.  Please visit the Trades Examination Information page for additional exam information and dates.

The exam will cover information contained in the following:


You will need a working knowledge of the component manuals for the various POWTS.  You will need to bring these to the exam site.  These can be purchased through Document Sales or by calling (608) 243-2441 or (800) 362-7253.  The general product names are as follows:

Product Name
At-Grade Pressure Distribution Component Manual

Holding Tank Component Manual  

​Single Pass Sand Filter Component Manual 
​In-Ground Soil Absorption Component Manual 
​Mound Component Manual   
​Pressure Distribution Component Manual 

Copies of Wisconsin Administrative Codes may be printed from the Wisconsin State Legislature site or obtained from Document Sales online or by calling (608) 266-3358.   NFPA standards may be ordered from the National Fire Protection Association, (800) 344-3555.  When there is a change to Wisconsin codes, exams will cover the new codes three month after the effective date.