Master Plumber study plan

Diagram the DWV system for a two-story, 2.5-bath house, labeling every trap, vent type, cleanout, and drain segment.

Distinguish individual, common, wet, circuit, and stack vents by stating where each is permitted and what limits each one.

Size a building drain and building sewer from a fixture-unit total using the fixture-unit table, and state the governing slope.

List the permit, rough-in, and final inspection trigger points for a residential job and state what each check verifies.

Compute the required fall for 2-, 3-, and 4-inch horizontal drains over runs of 10, 25, and 50 feet at the code slope.

Check 15 trap-arm lengths and sizes against distance, slope, and venting limits, and correct each violation you find.

Apply vent-stack and stack-vent sizing rules to three different layouts and record the size chosen for each.

Mark cleanout locations on a floor plan so they meet placement, spacing, and access rules.

Convert water supply fixture units to probable demand in gpm for three house layouts with different fixture mixes.

Size the meter, main, and branch supply lines from the tables for two layouts and record the table row used for each segment.

Compare PEX, copper, CPVC, PVC, and galvanized steel on joining method, pressure and temperature rating, and permitted use.

Write out the step-by-step joining procedure for solvent cement, press fittings, and solder, naming the inspection point in each.

Specify support spacing, expansion compensation, and physical protection for each of the five materials compared in week 3.

Match 15 fixtures to their trap size, minimum supply size, and required clearances.

Differentiate flush-valve and flush-tank water closet requirements, then size a flush-valve branch serving three closets.

Describe the protection required at each fixture outlet: air gap, vacuum breaker, trap primer, or floor drain.

Size a storage water heater and expansion tank for a given fixture count, and state the recovery and first-hour ratings you relied on.

Explain temperature-and-pressure relief valve requirements: rating, location, discharge pipe material and size, and termination point.

Compute the gas load in BTU/hr for a set of appliances and size the meter, main, and each branch by the longest-length method.

Distinguish category I and category IV appliances by vent material, termination, and combustion air requirements.

Classify 20 cross-connection scenarios by hazard level and assign an air gap, RPZ, DCVA, PVB, or dual check to each.

Walk through a backflow assembly test step by step and state what each recorded reading proves.

State the installation rules for each assembly type: orientation, drainage, accessibility, and freeze protection.

Identify where a cross-connection can exist in a fixture, appliance, or irrigation line and describe how to eliminate it.

Read a plumbing plan set and produce a fixture and pipe takeoff for one floor.

Prepare a material estimate with quantities, waste factor, and labor-hour allowance for a single-bath rough-in.

Write a hydrostatic and air test procedure for both DWV and water supply, including test pressures, durations, and pass criteria.

Build a three-stage inspection checklist covering rough-in, top-out, and final.

Re-take a full-length timed practice exam under exam conditions and beat your week 6 score by at least five points.

Drill your three lowest-scoring domains with 20 closed-book questions each and log every item still missed.

Recite from memory 25 high-yield code thresholds covering slopes, clearances, distances, and pressures.

Assemble a one-page final review sheet of the definitions and numbers you will scan on exam morning.