Basin Wastes 40mm Outlet (thread) Size

Basin wastes with a 40mm outlet buying guide

40mm is the standard outlet thread size for most modern basins sold in Australia, so this is the size to check first unless the basin being replaced is an older model. The safest way to confirm it is to measure the existing waste's outlet thread rather than guess from the basin's age or brand, since some brands have used a 32mm outlet on smaller or older basin models.

Pop-up vs standard

A pop-up waste uses a lever or cap mechanism built into the basin's overflow to open and close the drain, no separate plug to lose or replace, and it's the format most of this collection is built around, from Phoenix's universal pop-up waste through to Caroma and ADP's own basin-specific versions.

Matching the finish

Finish options run from chrome and gloss white through to brushed nickel, brushed brass, brushed gold and matte black, so it's worth matching the waste to the tapware finish rather than to the basin colour, since the waste sits at eye level next to the tap far more than it sits next to the basin bowl. For the 32mm equivalent, see basin wastes, 32mm outlet, or browse the full basin wastes range. See bathroom basins for the basins themselves, or wastes, traps and grates for the wider plumbing category.