A plumber installs, maintains and repairs water supply, drainage, sanitation and gas systems. In South Africa parts of the trade are regulated: certain plumbing work requires a qualified person, and a Certificate of Compliance is required for specified installations, which shapes what a plumber may sign off as well as what they may do.
This guide sets out plumber duties and responsibilities, the daily routine, and how the work differs between domestic, commercial and industrial settings. It sits in the Trades Technical duties and responsibilities cluster, part of the wider job duties guide.
What Does a Plumber Do?
A plumber works with water going in and waste going out, plus the fittings and appliances in between. The work splits into new installation to a drawing, fault diagnosis and repair, and maintenance, with emergency callouts adding an unpredictable layer to most plumbing jobs.
Diagnosis is where the skill shows. A leak visible in a ceiling rarely originates where it appears, and a plumber who opens the wrong wall costs the customer twice. Working systematically from symptom to cause, rather than replacing parts hopefully, is the difference between competence and expense.
Key Plumber Duties and Responsibilities
- Installing water supply, drainage, waste and vent pipework to specification.
- Installing and connecting sanitaryware, taps, mixers, geysers and appliances.
- Reading plans and setting out pipe routes, falls and connection points.
- Diagnosing and repairing leaks, blockages, low pressure and drainage faults.
- Servicing and replacing geysers, valves, pumps and pressure control equipment.
- Testing installations for leaks, pressure and correct operation before handover.
- Working to the applicable plumbing standards and municipal by-laws.
- Issuing or arranging certificates of compliance where required and qualified.
- Isolating water and, where applicable, gas safely before starting work.
- Estimating materials, quoting jobs and recording what was used.
- Supervising assistants and apprentices and checking their work.
- Completing job cards, test records and customer handover documentation.
Daily Tasks of a Plumber
- Start of day: collect job cards, load tools and materials, plan the route between jobs.
- On arrival: assess the fault or the installation, isolate the supply and protect the work area.
- Through the day: carry out the work, test as you go, and keep the customer informed of findings.
- On completion: pressure test, restore supply, check for leaks and clean the area.
- End of day: complete job cards and test records, restock the vehicle, report outstanding work.
Plumber Skills and Competencies
- Systematic diagnosis: tracing a fault to its cause rather than to its symptom.
- Standards knowledge: working to the applicable code and municipal requirements.
- Pipework skill: clean joints, correct falls and neat routing that will not be regretted later.
- Testing discipline: proving the work before leaving the site.
- Customer communication: explaining the fault, the fix and the cost in plain terms.
- Safety awareness: isolation, confined spaces, hot works and gas where applicable.
Plumber Duties by Workplace or Industry
Domestic and Residential
Geyser replacements, leak repairs, blocked drains, sanitaryware installation and pressure problems. Duties include quoting, dealing directly with homeowners and, for specified work, arranging the certificate of compliance.
Commercial Buildings and Complexes
Duties cover ablution blocks, water reticulation, pumps and pressure systems, and planned maintenance scheduled around occupants. Coordination with facilities managers and body corporates is part of the job.
Construction Sites
First and second fix installation against a programme and drawings, coordination with other trades, site inductions, and testing and handover of complete systems to the contractor or client.
Industrial and Institutional
Larger-bore pipework, process water, steam and specialised systems, with permit-to-work controls, shutdown windows and stricter documentation than domestic work.
Plumber Duties for a CV
Lead with your trade qualification and registration, then the type of installation. Use the duties for a CV guide for the method.
- Completed domestic and commercial plumbing installations and repairs, averaging six jobs a day on a service vehicle.
- Installed and replaced geysers including pressure control and safety valve compliance.
- Diagnosed and repaired leaks and drainage faults, pressure testing all work before handover.
- Supervised an apprentice and checked all work before sign-off.
Related Job Roles and Responsibilities
These guides cover the roles and next steps most closely related to this one.
- Electrician duties and responsibilities
- Handyman duties and responsibilities
- Foreman duties and responsibilities
- Trades, technical and operations duties
- Job description duties and responsibilities
Frequently Asked Questions About Plumber Duties
What are the duties of a plumber?
Installing water supply and drainage pipework, fitting sanitaryware and appliances, reading plans and setting out routes, diagnosing and repairing leaks and blockages, servicing geysers and valves, testing installations, working to plumbing standards and by-laws, and completing job cards and test records.
Does plumbing work need a certificate of compliance?
Certain plumbing work in South Africa requires a Certificate of Compliance issued by a qualified plumber, and municipalities may impose their own requirements. Confirm the current position with the relevant local authority and the industry body before assuming a job does or does not need one.
What is the difference between a plumber and a plumber’s assistant?
A qualified plumber carries out and takes responsibility for the installation, and where registered may certify it. An assistant supports that work under supervision, preparing materials and helping with installation, but does not sign off the job.
How do you qualify as a plumber in South Africa?
The usual route is an apprenticeship or learnership combining workplace experience with theory, followed by a trade test. Additional registration may be required to issue certificates of compliance. Requirements change, so confirm the current position with the relevant authority.
Duties vary by employer and sector. Plumbing is partly regulated, and the applicable standards, municipal by-laws and your qualification status take precedence over this general guide.
Last reviewed: 2 September 2026