Master Plumber Restricted Service 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, and some can be viewed and printed directly from the POWTS Component Manuals site.  The general product names are as follows:

Product Name
At-Grade Pressure Distribution Component Manual
Holding Tank Component Manual
Split Bed Recirculating Sand Filter System Component Manual
Single Pass Sand Filter Component Manual
​Recirculating Sand Filter Component Manual
​Drip Line Effluent Dispersal Component Manual
​In-Ground Soil Absorption Component Manual
​Mound Component Manual
​Pressure Distribution Component Manual

Additional training materials relating to this credential may be ordered through Document Sales.  They are intended to be training guides and may not match the current code.

Product Name
Plumbing - Drain & Vent System Design
Plumbing - Sizing the Water Supply System
Plumbing - Wisconsin Water Treatment Handbook
​Wisconsin POWTS Inspector Handbook
​Soil & Site Evaluation Handbook

​Multi Purpose Piping Systems Design 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.  International model codes and accessibility standards can be obtained from the International Code Council (ICC) or by calling (800) 786-4452.  When there is a change to Wisconsin codes, exams will cover the new codes three months after the effective date.