Cert III Plumbing study plan
Cert III Plumbing · Give each week a clear focus.
8 weeks · About 7 hours per week
Work health and safety, environmental sustainability and quality requirements & Sanitary plumbing, drainage and fixture installation
List the hazard categories on a residential plumbing site and match each to one control measure from the hierarchy of control
Explain the difference between a hazard, a risk and a control using three site examples you write yourself
Identify the PPE required for five common tasks (soldering, trench work, drain clearing, roof work, gas connection) and state why each item is needed
Outline the steps for isolating and tagging an energy source before working on a water or gas line
Describe how to segregate and dispose of three waste streams generated on a plumbing job, including a regulated waste
Your checkpoint
A one-page hazard-to-control matrix covering at least 12 hazards across domains 1 and 4, each with a named control and a responsible person
Sanitary plumbing, drainage and fixture installation & Water supply, roofing, stormwater and rainwater services
Trace a sanitary drainage layout from a fixture to the connection point and label every fitting and gradient change
Calculate the fall required for a 12 m drain run at 1:60 and at 1:80, showing working
Size and select traps and venting for a bathroom group using the relevant plumbing code tables
Describe the correct installation sequence for a floor waste, water closet suite and basin including waterproofing interfaces
Compare the pressure and flow requirements of a cold water supply to a single dwelling against a multi-fixture installation
Your checkpoint
A hand-drawn drainage and water supply schematic for a three-fixture bathroom with labelled pipe sizes, gradients and venting, plus a written check against code requirements
Water supply, roofing, stormwater and rainwater services & Excavation, trenching, pipe laying and site support
Calculate roof catchment area and expected rainwater yield for a 180 m2 roof at 800 mm annual rainfall
Size a stormwater downpipe and gutter run using manufacturer flow tables and record the assumptions
Describe the bedding, haunching and backfill requirements for a buried stormwater or sewer line at three depths
Explain shoring and battering options for a 1.8 m trench in two different soil types
List the locating and clearance checks required before excavating near existing services
State the inspection and testing steps for a completed below-ground drainage line before backfill
Your checkpoint
A stormwater and trenching work pack: catchment and downpipe sizing calculations, a trench cross-section sketch with shoring noted, and a pre-backfill inspection checklist
Gas services, installation and safety & Welding, brazing, soldering and pipe joining techniques
Identify the components of a typical domestic gas installation from meter to appliance and state the function of each
Size a gas line for a given appliance load using pipe sizing tables and record the pressure drop assumption
Describe the purge, test and commissioning procedure for a new gas installation including test pressures and durations
Compare soldering, brazing and fusion joining and select the correct method for copper, PEX and PVC applications
Set up and perform a capillary solder joint on copper tube, then pressure test it and record the result
Explain combustion air, flueing and clearance requirements for an indoor gas appliance
Your checkpoint
A gas installation and joining record: a labelled gas line diagram with sizing calculations, a written test procedure, and a logged solder joint pressure test result
Gas services, installation and safety & Heating, ventilation, air conditioning and refrigeration fundamentals
Describe the refrigerant cycle and identify the four main components and their function in a split system
Explain the safety controls for handling refrigerants, including PPE, ventilation and cylinder handling
Outline the ventilation requirements for a bathroom, kitchen and car park and state how each is achieved
Describe the condensate drainage requirements for an evaporative cooler and a split system indoor unit
List the checks required before and after connecting a gas appliance to an existing installation
Explain how to test for leaks on a refrigerant circuit and a gas line and state the difference in method
Your checkpoint
A side-by-side comparison sheet of gas and refrigerant safety and testing requirements, plus a labelled refrigerant cycle diagram with component functions
Plumbing tools, equipment, materials and trade calculations & Plans, specifications, drawings and setting out
Read a set of residential plumbing drawings and extract the pipe sizes, gradients, levels and fixture schedule into a takeoff table
Calculate pipe lengths, fitting counts and material quantities for a bathroom and kitchen rough-in from the drawings
Set out fixture positions from a datum and check the results against the drawing dimensions
Select the correct tool for five named tasks and state one safety check for each
Convert between metric units used on drawings and site measurements and check a level against a reduced level
Describe how a specification differs from a drawing and identify three items that appear only in the specification
Your checkpoint
A complete material takeoff and setting-out sheet for one bathroom and kitchen, with quantities, unit conversions and a datum-based setting-out check
Work health and safety, environmental sustainability and quality requirements & Plumbing tools, equipment, materials and trade calculations & Welding, brazing, soldering and pipe joining techniques
Write a safe work method statement for a task involving hot work and confined space entry
Demonstrate correct selection and inspection of brazing and soldering equipment before use
Describe fire watch and hot work permit requirements and the correct response to a flash fire
Explain how to store, transport and handle gas cylinders and refrigerant cylinders on site
Identify three environmental compliance obligations on a plumbing site and state how each is met
Complete a quality check on a finished pipe joint against a written acceptance criteria
Your checkpoint
A completed safe work method statement for a hot work task with a joint quality acceptance checklist attached
Communication, teamwork, customer service and work organisation & Work health and safety, environmental sustainability and quality requirements
Write a customer handover script for a completed bathroom renovation covering operation, maintenance and warranties
Describe how to raise a variation with a client and document it in writing
Explain the purpose of a toolbox talk and prepare a five-minute talk on one safety topic
Plan a two-week work sequence for a small job including material ordering and inspection points
Resolve a written conflict scenario between two trades on site using a documented communication process
Review your weak areas from weeks 1 to 7 and list the three topics you will revise before the exam
Your checkpoint
A job pack containing a handover script, a written variation example, a toolbox talk outline and a two-week work sequence with inspection points
Milestones
Week 2: Score at least 80% on a self-made 20-question quiz covering domains 1 and 4, and correctly calculate drain fall for three different runs
Week 4: Produce a gas line sizing calculation and a passing pressure test record for a soldered copper joint, checked against code tables
Week 6: Complete a full material takeoff from drawings with quantities within 10% of a re-check, and pass a 30-question mixed quiz on domains 2 and 3
Week 8: Complete a timed 60-question mock exam across all 10 domains and score at least 75%, with no domain below 60%