I get asked this more than you’d think. Someone’s done a bathroom reno, they’ve got a pile of old taps and copper fittings sitting in a bucket, and they want to know — where does this stuff actually go when I drop it off?
It’s a fair question. Most people hand over a bag of metal, get some cash, and leave. The process after that is a bit of a mystery. So let me walk you through it properly, from the moment you pull that old tap off the wall to the point where it becomes something new.
What makes brass worth recycling at all?
Brass isn’t a pure metal. It’s copper and zinc mixed together, and depending on the ratio, you get different types. The stuff in your taps and plumbing fittings is usually yellow brass — around 60 to 70% copper. Red brass, which you find in older valves and some fittings, sits closer to 85% copper. That higher copper content is why red brass pays a bit more when you sell it.
The reason it’s worth recycling comes down to one simple fact: brass doesn’t wear out through the recycling process. You can melt it down, reform it, use it, collect it, melt it again — and the material that comes out is exactly the same quality as when it started. That’s not true of most things you recycle. Paper degrades. Plastic downgrades. Brass just keeps going.
That’s also why about 90% of all brass produced today contains recycled material. Manufacturers prefer it. It’s cheaper to process than starting from raw copper and zinc ore, and the end product is no different.
So where does your scrap actually come from?
Plumbers are probably the biggest source. Every renovation, every bathroom refit, every leaking tap replacement — brass fittings come out of walls and off pipes all day long. Most experienced tradies keep a collection bin in the back of the van. Once it’s heavy enough, they drop it off and get paid.
Builders and construction sites generate a lot too. Electricians pull out brass connectors and junction boxes. Air conditioning techs accumulate valve fittings. Homeowners doing their own renos clean out old fixtures.
The mix is pretty varied, honestly. We get everything from a single tap brought in by someone who just wants to know if it’s worth anything (it usually is) to trailers stacked with fittings from a big commercial job.
What happens when you drop it off?
When your brass arrives at a recycling yard, the first thing that happens is sorting. Not everything you bring in will be the same grade, and the grade determines the price.
Clean yellow brass — no rubber seals, no steel bolts, no plastic bits still attached — sits in one category. Red brass in another. Brass shavings and machining turnings (the fine spirally offcuts from metalwork) get treated separately because they’re loose and need handling differently before they go in the furnace.
A magnet goes through the pile early in this process. Brass is non-magnetic, so anything the magnet picks up is contaminating the load — usually steel fittings or iron components that got mixed in. Those get pulled out.
If you’ve got a mixed load with stuff still attached — rubber washers, plastic ends, steel bolts — the yard will either sort it themselves (and adjust the price down to cover that work) or ask you to clean it up. Ten minutes with a shifter before you leave home can genuinely add to what you walk away with.
Then comes the shredding
Before anything goes near a furnace, the material gets broken down. Big fittings, taps, valves — they go through a shredder or get mechanically cut into smaller pieces.
This part matters for efficiency. Smaller, roughly uniform pieces melt faster and more evenly. If you threw a full-size valve into a furnace alongside a pile of shavings, you’d get an uneven melt and inconsistent results. The prep work before melting is what makes the output reliable.
Any remaining non-metal material — rubber residue, insulation, plastic — gets removed here too. By the time the brass is ready for the furnace, it should be as clean a feed as possible.
The furnace — where it actually becomes something else
This is the part most people picture when they think of metal recycling. The sorted, shredded brass goes into a furnace and gets taken up past 900 degrees Celsius. At that temperature it becomes fully liquid.
While it’s molten, impurities float to the surface and get skimmed off — the industry term for this is slag removal. Then the composition gets tested. A sample of the melt is analysed to check the copper-to-zinc ratio. If it’s drifted off spec — too much zinc, not enough copper, whatever — it gets corrected before the next stage.
This testing step is why recycled brass is indistinguishable from new brass. It’s not just melting and hoping for the best. The composition is actively managed so the output consistently meets the same standards as virgin material.
Casting — taking a new shape
Once the molten brass passes the composition check, it gets poured into moulds.
What shape it takes depends entirely on where it’s headed next. A lot of it goes into ingots — big rectangular blocks — that get sold to manufacturers who’ll work it into finished products. Some goes into rods or billets. Some gets rolled into sheet brass.
From here the recycling facility’s job is done. The material enters the manufacturing supply chain, and what happens next is up to whoever bought it.
Where does it end up?
New taps. Plumbing fittings. Door handles. Electrical terminals. Lock cylinders. Valve components. Some of it ends up in precision industrial parts. Some goes into musical instruments.
There’s something kind of satisfying about it when you think about it. That leaking tap you pulled out during your bathroom reno, the one that was annoying you every time you walked past it — within a few weeks it could be sitting on a shelf at Bunnings as part of a brand new fitting. The copper and zinc in it haven’t gone anywhere. They’ve just been reshaped.
A word on the environmental side
People sometimes bring this up and sometimes they don’t, but it’s worth mentioning.
Mining raw copper and zinc ore is an energy-intensive process. You’re digging up ground, crushing rock, running it through processing plants — all before you’ve even got to the stage of making brass. Recycling bypasses all of that. The energy required to recycle brass is roughly a tenth of what it takes to produce the same amount from scratch.
For Australia, where both metals are still mined domestically, the recycling industry takes real pressure off those resources. It’s not just the feel-good version of recycling — the numbers actually back it up.
What can you bring in?
Most scrap yards in Sydney will take:
Old bathroom and kitchen taps. Plumbing fittings and valves. Hose fittings and couplings. Door knobs, handles, and hinges. Brass electrical connectors. Air conditioning valve components. Machining offcuts and shavings. Locks. Old decorative hardware.
If you’re not sure whether something is brass, two quick tests. Hold a magnet to it — brass won’t attract. And look at the colour and weight. Brass has a warm yellow-gold tone (not the silvery grey of steel, not the reddish-orange of pure copper) and it’s noticeably heavy relative to its size.
What affects the price you get?
Weight is the obvious one. But type and cleanliness matter just as much.
Red brass pays more than yellow brass because of the higher copper content. Clean, sorted brass pays better than a mixed pile with bits still attached. And the market rate on the day you bring it in plays a role too — brass prices move with the global copper market, so the number shifts week to week.
If you’ve got a large quantity, it doesn’t hurt to ring a couple of yards and compare. Most reputable recyclers in Sydney will give you a quote over the phone once you describe what you’ve got.
Anything else worth knowing?
Oxidised brass — the dull, greenish, heavily corroded stuff — still has value, but it’s worth less than clean material. If you’ve got a choice between bringing it in now or waiting while it continues to corrode sitting in a shed, bring it in sooner. The metal itself isn’t going anywhere, but surface condition does factor into pricing.
And if you’re a tradie generating brass regularly, it’s worth setting up a relationship with a local recycler rather than just dropping in randomly. Consistent volume tends to get consistent treatment.
