Frequently Asked Questions
What is a basin waste and what types are available?
A basin waste is the drainage fitting at the bottom of the basin that allows water to drain while also providing a plug function when needed. Basin wastes in Australia are available as click-clack (pop-up operated by pushing down), plug-and-chain (traditional rubber or metal plug on a chain), and slotted or unslotted designs (slotted versions allow the basin overflow to function). Choose a waste that matches your tapware and basin finish for a cohesive look.
What size basin waste do I need?
Most Australian basins require a 32mm or 40mm diameter basin waste. The basin manufacturer's specifications will confirm the correct size. Ensure the thread size (typically 1¼" or 1½") matches your trap and waste pipe connection. Always check the waste specifications of your basin before ordering.
Should I choose a slotted or unslotted basin waste?
A slotted basin waste has a slot in the collar that aligns with the overflow outlet in the basin, allowing overflow water to drain. An unslotted waste is used on basins with no overflow hole. Installing an unslotted waste in a basin with an overflow will block the overflow and is a potential safety issue, always match the waste type to your specific basin.
What is a bath waste and what types are used?
A bath waste is the drainage assembly for a bathtub, consisting of the plug mechanism at the bottom of the bath and the overflow fitting at the upper end. Bath wastes in Australia are available as click-clack pop-up, cable-operated pop-up, and flip-lever (trip lever) types, as well as simple chain-and-plug designs. Many contemporary freestanding and back-to-wall baths use a click-clack waste for simplicity and a clean look.
What is a bottle trap and where is it used?
A bottle trap is a type of pipe fitting used beneath a basin or sink to create a water seal (trap) that prevents sewer gases from entering the bathroom. Unlike a traditional P-trap (which curves out of sight into the wall), a bottle trap has a compact, cylindrical body that hangs visibly beneath the basin, making it a design feature as much as a functional fitting. Bottle traps are the preferred choice beneath wall-hung basins and freestanding basins where under-sink plumbing is exposed.
What size bottle trap do I need for my basin?
The standard bottle trap size for Australian basins is 32mm (for most ceramic and stone basins) or 40mm (for larger basins with higher flow requirements). Always check the waste outlet diameter of your basin and confirm compatibility with the bottle trap before purchasing. The thread connection must also match your basin waste.
