If you’re designing or installing a new potable (drinking) water supply this year, there’s a compliance change you can’t ignore. From 2 May 2026, the Building Code pathway most people rely on tightens up what “acceptable” looks like for a bunch of fittings and components that touch drinking water.
It’s not just a box-tick either. Use the wrong valve, braided hose, meter, or copper alloy fitting on a new build, and you’re potentially staring down a failed Code Compliance Certificate (CCC) and a messy rework.
This latest insight is how we’re thinking about it at WaterForce, and what we’re putting in place so our customers (and our team) don’t get caught out.
What are the lead-free requirements for potable water parts?
From 2 May 2026, copper-alloy plumbing products used in contact with drinking water need to meet a maximum lead content of 0.25% (weighted average) under the updated Building Code Acceptable Solution G12/AS1 (Amendment 14). This applies to common items like fittings, valves, taps/mixers, water heaters and water meters. The previous pathway (Amendment 13) stops being acceptable from 2 May 2026, so new builds and consent documentation need to reflect the updated requirements.
The deadline
There’s a transition period that ends 1 May 2026, and the practical line in the sand is:
- Amendment 13 is no longer an acceptable solution from 2 May 2026
What products does this actually apply to?
A big part of the confusion is that it’s not only “plumbing” in the traditional sense. The lead-free provisions are aimed at products that come into contact with drinking water (particularly where copper alloys are involved), and industry guidance commonly calls out things like:
- Valves (isolation, pressure reduction, backflow prevention, tempering, etc.)
- Taps and mixers
- Water meters
- Flexible braided hoses
- Pumps used with cold/hot water supply systems
- Residential water filtration equipment (and the valves/fittings around it)
- Some fire sprinkler connections if they’re not isolated from drinking-water fixtures
And just as importantly, there are exclusions for gear that’s clearly non-potable (irrigation and dedicated firefighting systems, for example). On a new potable water supply, you can’t assume “we’ve always used this, so it’ll be fine”.
Lead-free is one part. Dezincification resistance is the other trap.
Separate but related: if you’re using copper alloy components under hydrostatic pressure in a water supply, there are requirements around dezincification resistance (DZR). If you’ve ever pulled apart a fitting that’s gone porous or crusty, you’ll know why this matters.
The common guidance is to ensure components under pressure are DZR, and to avoid practices that reduce corrosion resistance (for example, high-temperature brazing in the wrong place).
What “good” compliance evidence looks like
In plain English: you need to be able to show the products you’ve installed meet the standard.
MBIE’s guidance points to verifying products are tested/certified to appropriate standards (lead-free and DZR), and industry sources reference things like NSF/ANSI/CAN 372 for lead content, plus recognised certification pathways (WaterMark is a common one people look for on products and documentation).
A solid paper trail usually includes:
- Product datasheets that clearly state compliance
- Test certificates from accredited bodies (where applicable)
- A tidy schedule/list of potable-water-contact components used on the job
If you’re a property owner, that last item is important when the building inspector asks, “how do you know these are compliant?”
How WaterForce is approaching lead-free potable builds
This is the bit we care about most: making compliance easy to do, not hard to remember.
Here’s what we’re putting in place:
1) Clear separation of potable-approved parts
We’re working with suppliers to make it easier to identify what’s suitable for drinking water supplies, including separating “lead-free / approved” product lines so there’s less ambiguity at the point of ordering and picking.
2) A potable build “parts discipline”
On potable projects, we’re tightening up our internal approach so the same few items don’t keep popping up as question marks:
- braided hoses
- valves (including backflow, PRVs, isolation)
- water meters
- any brass fittings that end up in the supply
If it touches drinking water on a new build, it gets treated as “prove it” rather than “assume it”.
3) Documentation as part of the job, not an afterthought
For new supply systems, when request we can provide a simple install pack that helps with Compliance sign-off:
- what was used
- where it was used
- what documentation supports it
Not everyone needs a 40-page folder. They do need the right evidence in one place.
4) Talking to manufacturers early
Some categories (pumps, hoses, specialty valves) can be a grey area if you rely on “near enough” assumptions. We’re pushing those questions upstream early so project design and procurement aren’t scrambling late in the build.
If you’re planning a new potable water supply: a quick checklist
Before you lock in parts on a new build (or a major upgrade), your supplier can help you run through this:
- Confirm your compliance pathway for Building Code G12 and make sure your documentation matches Amendment 14 if the job lands after 2 May 2026
- List every component that will contact drinking water, including valves, meters, hoses and filtration equipment
- For copper alloy items, confirm ≤0.25% lead (weighted average) evidence should be available from your supplier
- Confirm DZR requirements are met where applicable (especially components under pressure)
- Keep evidence (datasheets/certificates) together so it’s easy to hand over at sign-off
Why this matters for rural and lifestyle properties too
A lot of rural potable water systems aren’t “simple house plumbing”. They might include:
- bore or spring pumps
- treatment/filtration
- storage tanks
- pressure sets
- meters and backflow protection
That mix increases the odds of one non-compliant component sneaking in, especially if parts come from multiple sources. The safest approach is to have one party designing and supplying the system with a compliance lens from day one.
Want WaterForce to sanity-check your potable design before you build?
If you’ve got a new potable water supply coming up (bore, spring, rainwater, rural subdivision, lifestyle block build), we can help you line up the right components and the documentation so you’re not redoing work later.
Talk to the WaterForce team about:
- potable water supply design and installs
- pump and pressure system selection
- backflow prevention where required
- filtration and treatment integration
- consent/compliance-friendly documentation
Get in touch and we’ll review your parts list or system plan before it becomes a problem on site.
