A plumbing Certificate of Compliance (CoC) certifies that a plumbing installation complies with SANS 10252 (water supply) and SANS 10400-P (drainage), and only a registered master plumber may issue one. Unlike the electrical CoC, there is no single national law making it compulsory everywhere: it is municipal. Cape Town requires a valid plumbing CoC before any residential property transfer, other municipalities increasingly ask for one, and practice varies, so the first call is always to the local water department.
Who runs the system: IOPSA and PIRB
Two bodies anchor SA plumbing compliance. IOPSA (the Institute of Plumbing South Africa) is the industry body: it represents registered plumbers, accredits training and advocates for the trade. The PIRB (Plumbing Industry Registration Board) administers the self-certification system: registered master plumbers certify their own work by issuing a plumbing CoC. A general plumber or handyman cannot issue one; the certificate belongs to the master-plumber registration.
Where the CoC is mandatory
- City of Cape Town: the Water By-laws require a valid plumbing CoC from a registered plumber before a residential property can be transferred, and the Deeds Office will not register the transfer without it. Exactly how long a previously issued certificate is accepted on transfer is a municipal practice question: confirm the current requirement with the City rather than relying on a quoted period.
- Other municipalities: requirements vary and are tightening. Some ask for a CoC at transfer, some on new installations, some not yet at all. Confirm with the municipal water department before quoting.
On validity generally: you will often see 3 years quoted, but there is no single national validity rule for plumbing CoCs. Treat any quoted period as local practice, and remember that any alteration to the installation (a new geyser, an added bathroom, replaced piping) puts the certificate's coverage in question and may require a new inspection and certificate for the changed work.
Geysers: where most installations fail
SANS 10254 governs hot water cylinder installation, and it is where compliance most often collapses. The essentials:
- The pressure control valve (PCV) must be on the main supply to the dwelling, giving balanced hot and cold pressure, not just on the geyser's cold-water inlet.
- Every water heater needs a drain or overflow pipe discharging safely outside.
- Temperature and pressure relief valves must be installed and tested.
- Solar geysers must comply with SANS 10254 plus the relevant solar collector standard, with a CoC on installation.
IOPSA research found that 70 to 80 percent of SA geyser installations are non-compliant, and 57.6 percent of cold-water supply installations fail inspection. Insurers know these numbers, which is why a valid CoC increasingly decides whether a burst-geyser claim is paid.
Worked example: the burst geyser
A homeowner's 150-litre geyser bursts and a plumber replaces it. That is new plumbing work, so the existing certificate no longer covers the installation as it now stands. The plumber must install to SANS 10254 (balanced PCV on the main supply, drain pipe, temperature and pressure relief), issue a new plumbing CoC for the work, and hand it to the homeowner. In Cape Town that certificate also matters at the next property transfer, so it goes in the house file, not the cubbyhole of the bakkie.
Common mistakes
- A handyman geyser swap with no certificate. The insurer's assessor will look for the CoC before looking at the damage.
- PCV on the geyser inlet only. Balanced pressure on the main supply is the current SANS 10254 requirement.
- Assuming one national validity period. It is municipal; confirm locally.
- Forgetting that alterations affect the certificate. New work means new certification for that work.
- Quoting a Cape Town transfer job without the CoC cost. The Deeds Office will not move without it.
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