Basin Wastes 32mm Outlet (thread) Size

What is a 32mm basin waste?

A 32mm basin waste is a basin drain fitting with a 32mm outlet thread, the measurement of the threaded connection where the waste joins the trap and plumbing below the basin. It's one of the most common outlet sizes used in Australian bathrooms, and getting this measurement right is the difference between a waste that fits straight in and one that leaks or won't connect at all.

This collection brings together 32mm outlet basin wastes from ART Australia and Eight Quarters, covering standard and click-clack style wastes built specifically to that thread size.

Why outlet thread size matters

The outlet thread size determines whether a basin waste will physically connect to your existing trap and pipework. A waste with the wrong thread size might look identical to the correct one but simply won't screw into place, or it will need an adaptor that isn't always a reliable long-term fix. This matters most in two situations: retrofitting a waste into an existing basin where the trap and pipework are already installed, and matching a waste to a specific basin model that specifies a 32mm outlet.

Retrofit versus new installation

If you're replacing a basin waste in an existing bathroom, the 32mm size is usually the safer match for older Australian basins and standard bottle traps, since it's been a common standard for a long time. Measuring the outlet on your existing waste, or checking the thread size on your trap, avoids the frustration of ordering a waste that arrives and doesn't fit. For a new installation, check the basin manufacturer's specifications, since some basins, particularly some imported or designer models, use a different outlet size and need a matching waste rather than the more common 32mm fitting.

Getting the measurement right

Outlet thread size is measured across the threaded section of the waste body, not the visible flange that sits inside the basin. If you're unsure what size your current waste is, a plumber can check it in a couple of minutes, or you can compare it against the thread on your existing trap. It's a small measurement, but ordering the wrong one is one of the more common reasons a basin waste gets sent back.

Finish and style options

Beyond the thread size, 32mm basin wastes in this range come in standard finishes such as chrome, matte black, and brushed metallics, and in both fixed grate and pop-up or click-clack plug styles. The finish and style choice is largely about matching your existing tapware and basin, while the 32mm outlet is what determines whether the waste actually fits your plumbing.

Where 32mm basin wastes are used

These wastes suit bathroom renovations where the existing trap and pipework are staying in place, new basin installations where the manufacturer specifies a 32mm outlet, and general replacements where a standard Australian thread size is needed. Checking this measurement before you order is the single most useful step in making sure the waste you receive is the one that will actually work with your basin.

Frequently Asked Questions