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Wisconsin Master Plumber–Restricted POWTS Installer Exam
— COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Wisconsin Master Plumber–Restricted POWTS Installer Exam — Full Coverage
The Wisconsin Master Plumber–Restricted POWTS (Private Onsite Wastewater Treatment System)
Installer Exam evaluates competency in the design, installation, maintenance, and regulation of onsite
wastewater treatment systems as governed by Wisconsin Administrative Code Chapters SPS 381–387,
SPS 305, and associated component manuals .
Exam Coverage Summary
Domain Key Topics
Regulatory Framework Wis. Stats. § 145 (Plumbing Code), SPS 381-387, SPS 305 (Licensing), SPS 385 (Soil Testing
Soil texture/permeability, seasonal high groundwater determination, redoximorphic featu
Site Evaluation & Soils
certified soil tester requirements
System Components Septic tanks, distribution boxes, absorption trenches, pumps, alarms, dosing chambers, ri
Gravity trench systems, design flows (150 gal/bedroom/day), absorption area sizing, trenc
Conventional POWTS
spacing
Mound systems, pressure-dosed systems, at-grade systems, aerobic treatment units, hold
Alternative POWTS
tanks
Component Manuals Mound Component Manual, Pressure Distribution Manual, In-Ground Soil Absorption Ma
(Open Book) Holding Tank Manual, At-Grade Pressure Distribution Manual
Maintenance &
Pumping intervals (3-5 years), system failure indicators, solids carryover, baffle inspection
Troubleshooting
100 ft from private well, 75 ft from surface water, 10 ft from structures, 5 ft from propert
Setback Requirements
lines
Permitting & Inspection DSPS/local approval required, pre-installation soil evaluation, post-installation inspection
250 Multiple-Choice Questions with Rationales
Batch 1: Questions 1–50 — Regulatory Framework & Licensing
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1. What is the primary statutory authority governing plumbing in Wisconsin, including POWTS
installations?
A) Wis. Stats. Chapter 101
B) Wis. Stats. Chapter 145
C) Wis. Stats. Chapter 254
D) Wis. Stats. Chapter 289
Rationale: Wis. Stats. § 145 establishes the state plumbing code, including licensing requirements for
master plumbers and POWTS installers .
2. Under Wis. Admin. Code SPS 305.36, which of the following qualifies an applicant for POWTS
maintainer registration?
A) Any licensed master plumber regardless of experience
B) Six hours of approved coursework on POWTS treatment and dispersal components
C) A minimum of 10 years of general plumbing experience
D) Completion of a real estate appraisal course
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Rationale: SPS 305.36(3)(a) requires at least 6 hours of approved coursework covering sand filters,
pumps, alarms, aerobic treatment units, valves, and active filtration devices .
3. Which specific component manuals are allowed as reference materials during the Master Plumber–
Restricted POWTS Installer exam?
A) Any plumbing textbook
B) Mound Component Manual, Pressure Distribution Manual, In-Ground Soil Absorption Manual, and
others
C) Only the Wisconsin Administrative Code
D) Manufacturer installation guides only
Rationale: DSPS allows specific component manuals including Mound, Pressure Distribution, In-Ground
Soil Absorption, Holding Tank, and At-Grade Pressure Distribution manuals into the open-book exam .
4. What is the minimum percentage required to pass the Wisconsin Master Plumber–Restricted POWTS
Installer exam?
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A) 60%
B) 70%
C) 75%
D) 80%
Rationale: According to DSPS exam information, the passing score for the Master Plumber Restricted
Service exam is 70% .
5. Under Wis. Stat. § 145.07(5), what experience is required to sit for the Master Plumber (Restricted)
examination?
A) 1,000 hours of experience as a licensed journeyman
B) 1,000 hours per year for 2 or more years as a licensed journeyman plumber (restricted)
C) 2,000 hours of general construction experience
D) A four-year engineering degree
Wisconsin Master Plumber–Restricted POWTS Installer Exam
— COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Wisconsin Master Plumber–Restricted POWTS Installer Exam — Full Coverage
The Wisconsin Master Plumber–Restricted POWTS (Private Onsite Wastewater Treatment System)
Installer Exam evaluates competency in the design, installation, maintenance, and regulation of onsite
wastewater treatment systems as governed by Wisconsin Administrative Code Chapters SPS 381–387,
SPS 305, and associated component manuals .
Exam Coverage Summary
Domain Key Topics
Regulatory Framework Wis. Stats. § 145 (Plumbing Code), SPS 381-387, SPS 305 (Licensing), SPS 385 (Soil Testing
Soil texture/permeability, seasonal high groundwater determination, redoximorphic featu
Site Evaluation & Soils
certified soil tester requirements
System Components Septic tanks, distribution boxes, absorption trenches, pumps, alarms, dosing chambers, ri
Gravity trench systems, design flows (150 gal/bedroom/day), absorption area sizing, trenc
Conventional POWTS
spacing
Mound systems, pressure-dosed systems, at-grade systems, aerobic treatment units, hold
Alternative POWTS
tanks
Component Manuals Mound Component Manual, Pressure Distribution Manual, In-Ground Soil Absorption Ma
(Open Book) Holding Tank Manual, At-Grade Pressure Distribution Manual
Maintenance &
Pumping intervals (3-5 years), system failure indicators, solids carryover, baffle inspection
Troubleshooting
100 ft from private well, 75 ft from surface water, 10 ft from structures, 5 ft from propert
Setback Requirements
lines
Permitting & Inspection DSPS/local approval required, pre-installation soil evaluation, post-installation inspection
250 Multiple-Choice Questions with Rationales
Batch 1: Questions 1–50 — Regulatory Framework & Licensing
, Page 2 of 148
1. What is the primary statutory authority governing plumbing in Wisconsin, including POWTS
installations?
A) Wis. Stats. Chapter 101
B) Wis. Stats. Chapter 145
C) Wis. Stats. Chapter 254
D) Wis. Stats. Chapter 289
Rationale: Wis. Stats. § 145 establishes the state plumbing code, including licensing requirements for
master plumbers and POWTS installers .
2. Under Wis. Admin. Code SPS 305.36, which of the following qualifies an applicant for POWTS
maintainer registration?
A) Any licensed master plumber regardless of experience
B) Six hours of approved coursework on POWTS treatment and dispersal components
C) A minimum of 10 years of general plumbing experience
D) Completion of a real estate appraisal course
, Page 3 of 148
Rationale: SPS 305.36(3)(a) requires at least 6 hours of approved coursework covering sand filters,
pumps, alarms, aerobic treatment units, valves, and active filtration devices .
3. Which specific component manuals are allowed as reference materials during the Master Plumber–
Restricted POWTS Installer exam?
A) Any plumbing textbook
B) Mound Component Manual, Pressure Distribution Manual, In-Ground Soil Absorption Manual, and
others
C) Only the Wisconsin Administrative Code
D) Manufacturer installation guides only
Rationale: DSPS allows specific component manuals including Mound, Pressure Distribution, In-Ground
Soil Absorption, Holding Tank, and At-Grade Pressure Distribution manuals into the open-book exam .
4. What is the minimum percentage required to pass the Wisconsin Master Plumber–Restricted POWTS
Installer exam?
, Page 4 of 148
A) 60%
B) 70%
C) 75%
D) 80%
Rationale: According to DSPS exam information, the passing score for the Master Plumber Restricted
Service exam is 70% .
5. Under Wis. Stat. § 145.07(5), what experience is required to sit for the Master Plumber (Restricted)
examination?
A) 1,000 hours of experience as a licensed journeyman
B) 1,000 hours per year for 2 or more years as a licensed journeyman plumber (restricted)
C) 2,000 hours of general construction experience
D) A four-year engineering degree
