Two documents, two questions
An Australian buyer asking whether a toilet is compliant is usually asking two questions at once. The two have different answers, and the answers are held by different people. The first is whether the fixture is a certified product. The second is whether the way it was installed on this particular site meets the installation standard. A WaterMark certificate answers the first. It says nothing about the second.
The split is not a technicality. It decides who has to act before the other party can proceed, which document settles an argument after handover, and who carries the cost when a bathroom has to be opened up again.
What WaterMark certifies
WaterMark certification is the precondition for a plumbing product being legally installed in Australia. The scheme is administered through the Australian Building Codes Board, and it operates on products rather than on projects. Under that scheme, a WC pan is usually assessed against AS 1172.1.
What comes out of the process is a product document. It identifies the product, states the standard it was assessed against, and names the certificate holder. It is issued for a model or a model family, not for a container load, not for a building, and not for a method of installation. That scope is the whole point of the document: it is a statement about the object, made once, and it travels with the object.
It follows that a WaterMark certificate is evidence of one thing only. It is not a warranty, it is not a statement that the pan will suit a given wall construction, and it is not a statement that the outlet in this building lines up with anything.
What AS/NZS 3500 covers
AS/NZS 3500 is a series of installation standards, and it is referenced by the Plumbing Code of Australia. Plumbing work that commences on or after 20 October 2025 has to comply with the updated series. That date is the one to check against your programme, because it is tied to when work starts rather than to when the product was bought or the permit was lodged.
Nothing in that description concerns the product. It concerns the work: setting out, connection, support, fall, access for maintenance, and the testing that follows. The detail belongs to the standard and to the contractor who holds the licence to apply it. A factory on the other side of the world cannot hold a view on any of it, because a factory does not see the building.
Where the two lines separate in practice
Put the two documents side by side and the separation is easy to see. One is issued before the goods ship and travels with them. The other is produced by work on site, after the goods arrive, and is specific to that site.
The failure mode is not that either document is wrong. It is that one is used in place of the other. A pan with a valid certificate can be installed badly, and an installation carried out perfectly cannot make an uncertified pan installable. Each line answers its own question, and neither can be borrowed to close the other.
Why the certificate cannot close an installation defect
When a bathroom fails after handover, the symptoms are usually about the join rather than the object: movement, a leak at a connection, an odour that comes back, a pan that rocks. None of those are addressed by a document that describes a product’s conformity to a product standard. Producing the certificate in that conversation does not answer the question being asked, and the buyer is left holding a valid document that has no bearing on the defect.
The reverse mistake is just as common and more expensive. A contractor installs to the standard, does everything correctly, and then discovers the pan was never certified for the Australian market at all. The installation was right; the product was never eligible. At that point no amount of workmanship closes the gap, and the pan has to come out.
Where our range sits
What we hold, and can put in front of you, is short and specific.
- WaterMark certification on the models it covers, with the certificate scope available so you can check whether your model is inside it.
- An AS 1976 test report recording water absorption of 0.14%.
- A WELS rating of 3.5 stars on the models rated under that scheme.
- CE marking on our wall-hung models, ISO 9001 for the plant, and two SGS VOC reports.
- Other market documents on request, as certificate documents, not as downloads.
We do not hold an AS/NZS 3500 qualification, and it would be misleading to suggest otherwise. AS/NZS 3500 is an installation standard. Complying with it is the work of the licensed plumbing contractor on the project, and confirming that compliance is a site matter. There is no product certificate to be had for it, from us or from any other factory.
What to send with an Australian enquiry
Four pieces of information turn a general question into one we can answer with files.
- The model codes you are pricing, printed, so the answer is about your order rather than about the catalogue.
- Whether the WaterMark certificate has to name the specific model, or whether a family certificate is accepted by the project.
- Who is installing, and whether they have confirmed which edition of the AS/NZS 3500 series applies to their commencement date.
- The rough-in and outlet arrangement the building provides, so any mismatch is found while it can still be fixed on paper.
That last point is where most of the avoidable trouble sits. A pan and a building that disagree about where the outlet is produce a problem that no certificate can solve, and the conversation that follows is always more expensive than the drawing review that would have prevented it.
Keeping both halves in one file
A project compliance file that holds only the product certificate looks complete and is not. The same is true of a file that holds only the plumber’s certification of the work. What a client, an insurer or a building surveyor will eventually want is both, in the same place, with the model numbers matched to the units installed.
The practical habit is simple. File the product documents against the model list at the time of order, file the installation records against the same model list at handover, and keep the two lists identical. When the two lists drift apart, the gap between them is exactly where the two systems do not meet.
Frequently asked questions
Does a WaterMark certificate mean the installation complies?
No. WaterMark is product certification, issued against a product standard such as AS 1172.1. Installation compliance is a separate question governed by the AS/NZS 3500 series and carried out by the licensed contractor on site. A certified pan can still be installed in a way that fails the installation standard.
Do you hold AS/NZS 3500 certification?
No, and no factory does. AS/NZS 3500 is an installation standard referenced by the Plumbing Code of Australia, not a product certification scheme. What we hold is WaterMark product certification on the models it covers. Installation compliance is the responsibility of the plumbing contractor on the project.
Which edition of AS/NZS 3500 applies to my project?
The updated series applies to plumbing work commencing on or after 20 October 2025. Whether your project falls before or after that date depends on when work starts, not when the product was ordered. Your plumbing contractor or the relevant regulator should confirm the applicable edition against the current official guidance.
Can you send a document confirming the installation will comply?
No. We are not on site and we do not install, so we cannot make a statement about work we have not seen. What we can send is the product-side file: the WaterMark certificate for the models covered, the AS 1976 test report, drawings, and the technical documents your contractor needs to plan the connection.
Is AS 1172.1 the same as AS/NZS 3500?
No. AS 1172.1 is the product standard a WC pan is assessed against under WaterMark. AS/NZS 3500 is the installation standard set. One describes what the fixture has to be; the other describes how the work around it has to be done. They are not versions of the same document.
What happens if an uncertified model reaches site?
It cannot be lawfully installed, whatever the workmanship. WaterMark certification is the precondition for legal installation of a plumbing product in Australia, so the usual outcome is removal and replacement rather than a fix. This is why the model list should be checked against the certificate before the order is placed.
Related on this site
Documents and certificates
- Certificates and the markets each one covers
- The AS 1976 report, catalogues and technical drawings
- Working with Australian buyers
Related reading
- WaterMark and WELS for Australian buyers
- Ordering toilets for Australia: the first order
- amfori BSCI and Sedex: What a Buyer Inherits