If you are sourcing faucets for the Australian or New Zealand market, you have probably heard the term WaterMark certification thrown around more than once. It is not a nice-to-have label — it is a legal requirement. Without it, your shipment does not clear customs. And the standard behind it, AS/NZS 3718, spells out exactly what your products need to pass before they ever reach a retail shelf or a plumbing contractor’s truck.
We have walked dozens of B2B buyers through this process from the manufacturer’s side. Here is what actually matters, test by test, so you can vet suppliers with confidence instead of crossing your fingers.
AS/NZS 3718:2005 — officially titled Water Supply — Tap Ware — is the Australian/New Zealand standard that governs the performance and safety of faucets and tapware connected to potable water systems. It applies to a broad range of products: basin taps, kitchen mixers, shower faucets, bathtub spouts, sensor taps, timed-flow taps, and mechanical mixing taps. The DN size range spans from DN6 all the way to DN50, covering both residential and light commercial fittings.
The standard was reconfirmed in 2015 and again in 2016 by Standards Australia and Standards New Zealand respectively, confirming its ongoing relevance without amendment. If your supplier tells you their products are “WaterMark certified,” what they mean — or should mean — is that those products have been independently tested and verified against AS/NZS 3718 by an accredited conformity assessment body.
One thing that trips up first-time importers: AS/NZS 3718 is not a design standard. It does not tell you how a faucet should look. It tells you what the faucet must withstand. That distinction matters when you are reviewing test reports from a factory.
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Here are the six testing categories that determine whether a faucet earns its WaterMark certification. If you are comparing suppliers, these are the reports you want to see — not a promotional brochure.
Australia and New Zealand take water conservation seriously, and the flow rate limits baked into AS/NZS 3718 reflect that. Basin and kitchen faucets must not exceed specified maximum flow rates at designated supply pressures. Typical thresholds hover around 6 to 9 litres per minute for basin taps and 7.5 to 9 litres per minute for kitchen mixers, though exact values depend on the product category and nominal size.
What this means in practice: the factory cannot simply ship any aerator they have in stock. The flow regulator must be matched to the valve body geometry and tested as a complete assembly. A faucet that passes flow testing with one aerator can fail with another. Smart importers verify that the flow rate certificate matches the exact SKU being shipped.
Everything that touches drinking water — the brass body, the cartridge seals, the flexible hoses, the aerator housing — falls under the material safety clauses of AS/NZS 3718. The standard restricts lead, chromium, cadmium, arsenic, and other heavy metal content in wetted components. Products must pass leachate testing that simulates prolonged water contact, confirming that no harmful substances migrate into the water supply over time.
For Chinese manufacturers, the brass alloy composition is where most failures happen. Low-lead or lead-free brass (typically containing less than 0.25% lead by weight in wetted surfaces) is the baseline expectation. Ask your supplier for the material composition certificate — not just the finished product test report. Both matter.
This is the test that separates commodity faucets from ones built to last. AS/NZS 3718 requires tens of thousands of open-close cycles — simulating years of daily use — without leakage, handle failure, or degradation in flow performance. Mechanical mixing taps face additional cycling across hot and cold positions.
Cartridge quality is the single biggest variable here. A ceramic disc cartridge from a reputable supplier (Kerox, Sedal, etc.) can sail through endurance testing without issue. A no-name cartridge from a cost-cutting factory will often fail before hitting half the required cycles. When you are comparing unit prices across suppliers, the cartridge specification is where the real cost difference lives.
Faucets must withstand hydrostatic pressure well above normal operating conditions without leaking, deforming, or bursting. AS/NZS 3718 specifies both static pressure tests and cyclic pressure pulse tests that simulate water hammer and pressure fluctuations in real plumbing systems.
This matters more than most buyers realize. Australian water supply pressures can spike — especially in multi-storey buildings and areas with aging infrastructure. A faucet body with casting porosity or a poorly brazed joint will reveal itself under pressure testing long before it reaches an end user’s home. The fact that your supplier’s samples “look fine” is not a pressure test result.
AS/NZS 3718 sets a continuous operating temperature limit of 80°C for standard tapware. Products designed for higher or lower temperature ranges must be tested against the appropriate criteria. Mixing taps require additional verification of temperature stability — the outlet temperature must remain within safe bounds even when inlet pressures fluctuate.
Thermal shock resistance is part of this category as well: the faucet must survive rapid transitions between hot and cold water without cracking seals or warping internal components. For B2B buyers sourcing for commercial kitchens or aged-care facilities, thermal performance should be a non-negotiable checkpoint in your supplier audit.
Handles must not snap. Spouts must not loosen. Threaded connections must not strip. AS/NZS 3718 includes mechanical strength tests that apply torque, bending forces, and pull-out forces to critical components. The standard also covers product marking — every compliant faucet must carry legible identification including the manufacturer’s name or trademark, model number, and the WaterMark logo.
A practical tip: during a factory visit, grab a random faucet off the production line and twist the handle hard. It sounds unscientific, but you can tell a lot in five seconds. The ones that feel solid under hand force are the ones that passed the lab tests.
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A one-glance summary for B2B buyers evaluating supplier test documentation:
| Test Category | What It Checks | Why Buyers Should Care |
|---|---|---|
| Flow Rate | L/min at specified pressure | Non-compliant flow = customs rejection |
| Material Safety | Heavy metal leaching, alloy composition | Health regulation risk; product recall exposure |
| Endurance | Tens of thousands of on/off cycles | Warranty claims; brand reputation |
| Pressure Resistance | Static burst + cyclic pulse | Leakage liability; insurance compliance |
| Thermal Performance | 80°C continuous; thermal shock cycling | Commercial & healthcare sector eligibility |
| Mechanical Strength | Torque, pull-out, bend resistance | Installation failure; on-site callbacks |
Use this checklist when reviewing a supplier’s test documentation. Missing or incomplete reports in any of these six categories are a red flag.
The WaterMark Certification Scheme is administered by the Australian Building Codes Board (ABCB). Products are evaluated by accredited conformity assessment bodies — companies like IAPMO, SAI Global, and BSIA — not by the manufacturer themselves.
The process follows a predictable path:
A realistic timeline from application to certificate is three to six months, assuming the product passes testing on the first attempt. Products that fail any test clause go back to the drawing board, adding weeks or months. This is why working with a manufacturer who already holds active WaterMark certifications — rather than one who “plans to get certified” — saves real time.
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WaterMark is mandatory under the National Construction Code (NCC) of Australia. Any plumbing product connected to a drinking water supply that does not carry a valid WaterMark certificate cannot be legally installed — and in practice, cannot be imported, distributed, or sold. Customs and border authorities actively enforce this.
For importers, the stakes are higher than a single rejected shipment. Plumbing regulators in Australian states and territories maintain databases of non-compliant products and suppliers. Showing up on the wrong side of that list damages relationships with distributors, builders, and retailers who rely on compliant supply chains.
A few real-world scenarios we have seen:
The fix is straightforward: verify the certificate number against the WaterMark product database. Match the model number to your purchase order. Request the full test report, not just the certificate page. These three steps take under ten minutes and they eliminate the single biggest source of compliance risk.
For importers looking to build a long-term presence in the Australian market, partnering with a manufacturer that already maintains active WaterMark certifications across multiple product categories — like FAAO’s faucet range — turns a compliance burden into a competitive advantage. You spend less time chasing paperwork and more time growing distribution.
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Yes — with very few exceptions. Under the Plumbing Code of Australia, any tapware or plumbing product that connects to a drinking water supply must hold a valid WaterMark certificate. This covers basin mixers, kitchen faucets, shower taps, bathtub spouts, and related components. The only exemptions apply to specific low-risk fittings listed in the NCC, and faucets are not among them.
AS/NZS 3718 covers metallic taps, plastic taps, mixing taps (mechanical, non-thermostatic), sensor taps, lever taps, timed-flow taps, and tap sets from DN6 to DN50. Basically: if it is a faucet connected to a potable water line and operates at or below 80°C continuous, it falls within scope. Thermostatic mixing valves have their own separate standard (AS 4032.1), so do not confuse the two.
For a product that passes all tests on the first attempt, expect three to six months from application to certificate issuance. The longest variable is usually the endurance test, which runs tens of thousands of mechanical cycles and cannot be accelerated beyond a certain point. Factory audit scheduling can add a few weeks as well. Products requiring re-testing after a failure can stretch the timeline to eight months or more.
Material composition — specifically, lead content exceeding the allowable limit in wetted brass components. Many manufacturers, particularly those producing for markets with less stringent regulations, use standard brass alloys that do not meet Australia’s drinking water contact requirements. The second most common failure is endurance: cheaper cartridges and seals degrade well before the required cycle count.
Yes — the standard does not discriminate by country of origin. WaterMark certification is issued by accredited assessment bodies that evaluate products against the same AS/NZS 3718 clauses regardless of where the factory is located. An overseas manufacturer’s product either passes the same tests or it does not get certified. The key is verifying that the certificate is current and that the factory’s ongoing surveillance audits are up to date.
WaterMark compliance under AS/NZS 3718 is not a checkbox to tick at the last minute. It is a six-category gauntlet — flow, materials, endurance, pressure, temperature, and mechanical integrity — that tests whether a faucet belongs in the Australian and New Zealand markets at all. For B2B importers, the difference between a smooth launch and a costly customs rejection comes down to one thing: whether your supplier’s test reports are real and current.
We manufacture faucets that have already passed these tests. If you are sourcing for Australia or New Zealand and want to skip the compliance guesswork, reach out to our team. We will share actual test reports, not sales pitch PDFs.
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