Nero Opal Progressive Wall Basin/Bath Set

The key factor is the height and style of your basin. For standard inset or semi-recessed basins, a regular deck-mounted basin mixer with a spout height of around 100–140mm works well. However, if you have an above-counter or vessel basin, where the bowl sits on top of the benchtop, you will need a tall basin mixer with a spout height of 180mm or more, otherwise the spout will sit below the basin rim and water will splash onto the benchtop. Wall-mounted mixers offer another option for above-counter basins, with the height controlled by your rough-in position. Always confirm basin rim height before purchasing your tapware.

While bath mixers and basin mixers may look similar, they are not interchangeable. The key technical difference is the water supply connection size. This difference matters because filling a bathtub requires a significantly higher flow rate, a basin mixer simply cannot deliver water fast enough to fill a bath in a reasonable time. Always use tapware specified for bath applications when fitting out a bath, and consult your plumber if you are unsure.

The Water Efficiency Labelling and Standards (WELS) scheme is a mandatory Australian government rating system that measures how water-efficient a tapware product is. Ratings run from 1 to 6 stars, the more stars, the less water the tap uses per minute. For basin mixers, a 5 or 6-star WELS rating is considered excellent and translates to meaningful long-term savings on water bills, particularly important in drought-prone Australian states. All tapware sold in Australia must carry a WELS rating, and most reputable brands now offer basin mixers rated 4 stars or higher as standard. Look for the WELS label on the product or packaging before you buy.

Freestanding floor-mounted bath mixers require careful planning before installation, this is not something that can be decided after tiling is complete. The plumbing supply needs to be brought up through the floor slab or subfloor to the exact location of the mixer before waterproofing takes place. You will need to work with your plumber early in the renovation process to confirm the rough-in position. You should also measure the spout height carefully against your bath's rim height, the water must fall clearly into the bath, not trickle down the rim.