NSW Plumbing Licence study plan

Map every Domain 1 topic area (sanitary drainage, water supply, gasfitting, ventilation, fixture connection) into a personal checklist with a confidence rating from 1 to 5

Explain the purpose and sizing logic of the sanitary drainage system, including fixture unit loading, trap seals and venting, in your own written notes

Solve 25 practice calculations on drain sizing, grade and fall, and record the method used for each

List the key compliance checks an inspector makes on a below-ground drainage installation before backfill

Describe the water supply system from meter to fixture, covering pressure, backflow prevention and cross-connection control

Compare the requirements for gas pipe sizing, purging and pressure testing across typical domestic installations

Diagnose five given fault scenarios (gurgling traps, poor hot water delivery, gas pressure drop) and write the likely cause and remedy for each

Draft a one-page inspection sequence for rough-in and fit-off stages of a combined plumbing and gasfitting job

Break roof plumbing into its component systems: roof catchment, gutters, downpipes, flashing, sarking, rainwater disposal and overflow

Calculate catchment area, rainfall intensity and required gutter and downpipe capacity for three worked examples

Sketch the correct flashing detail for an abutment, a valley and a penetration, and label every layer

Identify the common causes of roof leaks and ponding and state the installation fix for each

Explain the correct sequence for installing and testing a rainwater tank, overflow and charged system

Describe the requirements for metal roof sheeting, fixings, thermal movement and sarking in your own words

Complete a 30-question Domain 2 practice set under timed conditions

Review every incorrect answer and link it back to the relevant installation principle

Outline the medical gas chain of responsibility, from source to outlet, and the roles of the installer, verifier and certifier

Explain the identification, labelling, brazing and purge-testing requirements that distinguish medical gas work from general gasfitting

Describe the commissioning and verification documentation required before a medical gas system is handed over

Summarise the mechanical services essentials: ductwork, chilled and heating water, condensate drainage and plant connections

Work through five medical gas non-conformance scenarios and state the corrective action and reporting obligation for each

Explain the pressure testing and leak testing regime for medical gas pipelines and how it differs from natural gas testing

Describe how condensate drainage and mechanical plant connections interact with the plumbing and drainage systems

Complete a 30-question Domain 3 practice set and record the reasoning for each answer

Define what counts as fixed electrical equipment for disconnection and reconnection and where the plumbing licence boundary sits

Explain safe isolation procedure, verification of de-energisation, tagging and the limits of work permitted without a full electrical licence

Describe the testing and documentation required before reconnecting equipment such as a storage water heater, pump or ducted unit

Identify the hazards of working near electrical installations in wet areas and state the controls for each

Sit two full-length timed practice exams covering all four domains and record the score for each domain

Revisit the two weakest domains and rewrite the summary sheets for those areas from memory

Consolidate all four domain summary sheets into a single revision pack with the highest-risk facts highlighted

Build a final-week routine that revisits calculations, compliance checks and documentation requirements daily