WI Plumber study plan
WI Plumber · Give each week a clear focus.
8 weeks · About 6 hours per week
Drain, Waste, and Vent Systems
Trace the route of a building drain to the stack vent and name every fitting, cleanout, and size along the way
Calculate drain fixture units for a two-story, two-bath dwelling and select the building drain and building sewer sizes
Sketch a P-trap and trap arm showing maximum developed length and the vent connection point
Distinguish a vent stack, stack vent, yoke vent, and relief vent from memory without notes
Identify which DWV piping materials are approved in Wisconsin and how each is joined
Your checkpoint
Hand-drawn DWV riser diagram of a two-story house with every pipe labeled by size, slope, and fixture units.
Drain, Waste, and Vent Systems & Plumbing Code, Permits, and Administration
Size individual and branch vents for a given fixture-unit load using the vent sizing table
State the required slope for 1-1/2, 2, 3, and 4 inch horizontal drain pipe and the rule for changes in direction
Locate and cite the Wisconsin administrative code chapters that govern drain, waste, and vent installation
List the sequence of permits and inspections required before a drain is buried and before a building is occupied
Explain cleanout placement rules at changes of direction, at the building sewer, and at the end of runs
Your checkpoint
One-page permit-and-inspection flow chart plus a 25-question self-written DWV sizing quiz with an answer key.
Water Supply and Distribution Systems
Size a water service and meter for a dwelling from fixture units, developed length, and available street pressure
Calculate pressure loss through a given pipe run using friction tables and elevation change
Compare upfeed and downfeed distribution layouts and state when a booster pump or pressure-reducing valve is required
Describe backflow protection for a hose bibb, a boiler feed, and a lawn irrigation connection
Identify approved potable water piping materials and the joining method for each
Your checkpoint
Water supply sizing worksheet for a 2.5-bath house showing fixture units, developed length, and residual pressure at the farthest fixture.
Water Supply and Distribution Systems & General Plumbing Knowledge and Safety
Test a completed water line at the required test pressure and document the result on a written record
Identify trenching, confined-space, and soldering fire hazards and the protective equipment each demands
Explain thermal expansion control and where a check valve forces an expansion tank
Cite the minimum and maximum allowable pressure at a fixture outlet
Demonstrate safe shutoff, lockout, and gas-piping isolation steps before starting a repair
Your checkpoint
Pressure-test and jobsite safety checklist, plus a timed 50-question mixed practice test with every miss logged.
Fixtures, Fixture Fittings, and Appliances
Count the minimum required fixtures and fixture clearances for a single-family dwelling from a floor plan
Diagnose the difference between a failing fill valve and a failing flush valve by symptom
Specify the air gap or backflow arrangement required for a dishwasher and a water heater drain pan
Lay out a clothes washer standpipe with correct trap, height, and vent connection
Verify the listing and certification requirement for fixtures and fixture fittings before installation
Your checkpoint
Fixture-count and clearance worksheet for a 3-bedroom, 2.5-bath plan with a code citation beside every number.
Plumbing Code, Permits, and Administration & Fixtures, Fixture Fittings, and Appliances
Complete a mock permit application identifying scope, applicant, and who may sign
Sequence the rough-in, top-out, and final inspections and list what each one checks
Explain the consequences of work done without a permit, including stop-work orders and penalties
Distinguish a variance, an appeal, and a code interpretation and the route each takes
Match appliance installation requirements to their governing code sections
Your checkpoint
Completed mock permit package plus a 40-question fixtures and administration practice set scored at 80% or better.
Plumbing Code, Permits, and Administration & Drain, Waste, and Vent Systems
Build a personal index mapping 30 key code subjects to their section numbers
Re-work every missed question from weeks 1 through 6 and write the governing rule for each
Re-derive drain and vent sizing for a new fixture layout without reference to earlier worksheets
Explain how a local amendment or municipal ordinance can tighten a state plumbing rule
Your checkpoint
Thirty-entry personal code index and a corrected error log with the source rule cited for every entry.
General Plumbing Knowledge and Safety & Water Supply and Distribution Systems & Drain, Waste, and Vent Systems & Fixtures, Fixture Fittings, and Appliances & Plumbing Code, Permits, and Administration
Complete two full-length timed practice exams under exam-day conditions
Recite the top 25 numbers from memory: slopes, pressures, fixture units, clearances, and distances
Review every remaining miss and confirm the underlying rule is understood, not memorized
Rehearse the exam-day routine: reference materials allowed, time per question, and flag-and-return strategy
Your checkpoint
Final timed practice exam scored at 80% or higher plus a one-page numbers cheat sheet written from memory.
Milestones
Week 2: Draw the DWV riser diagram and pass the self-written DWV quiz at 80% or better without notes.
Week 4: Score 70% or higher on the first timed 50-question mixed test and finish the water supply sizing worksheet correctly.
Week 6: Score 80% or higher on the fixtures and administration practice set and submit a complete mock permit package.
Week 8: Score 80% or higher on two full-length timed exams and recite the 25 key numbers from memory.