Wastes, Traps & Grates

Bathroom Wastes, Traps and Grates Buying Guide

A drain is one of the few fixtures in a bathroom that's chosen almost entirely on function first, yet it sits in plain view on the shower or bathroom floor every day. Getting the type right, floor waste, channel grate, basin waste or bath waste, matters more than any other decision here, but finish is still worth choosing deliberately, since a well-matched grate reads as considered even in a fixture most people barely register.

Floor wastes

A floor waste sits in the bathroom or laundry floor, topped with a square grate, a round grate, or a tile insert. A tile insert conceals the drain beneath a piece of the room's own floor tile, which keeps the floor reading as one continuous surface rather than interrupted by a visible metal grate.

Shower channel and linear grates

A channel or linear grate is a long slot drain, run across a shower entry or against a wall. This format suits curbless, step-free showers particularly well, since the floor only needs to fall in one direction toward the channel, rather than sloping toward a central point drain from multiple angles.

Basin and bath wastes

Basin and bath wastes sit within the fixture itself. A basin waste is typically 32mm across, while a bath waste is larger, at 40mm, to handle the greater volume of water a bath needs to drain.

A plug and waste uses a rubber plug on a chain, while a pop-up waste opens and closes with a push or a small lever, removing the loose plug altogether.

The detail worth checking before choosing either is overflow. A basin with an overflow hole near the rim needs a waste designed to work with that overflow; a basin without one needs a no-overflow waste instead. Confirming this before ordering avoids a waste that doesn't function correctly with the specific basin it's paired with.

Traps

A trap is the curved section of pipe beneath a waste that holds a small amount of water, forming a seal that stops sewer gas rising back into the room. The common types, P-trap, S-trap and bottle trap, are chosen to suit how the existing pipework runs behind the wall or under the floor, so the correct type generally depends on the plumbing already in place rather than personal preference.

A basin bottle trap is worth considering specifically where the trap will be visible, such as beneath a wall-hung or above-counter basin without a full vanity cabinet concealing it. Its rounded, compact shape reads as a considered design detail rather than a purely functional pipe fitting, and it's available in finishes matched to the rest of the tapware, chrome, matte black, gold, gunmetal and nickel among them, so it can be chosen as a visible feature rather than something to hide.

Choosing a finish

Grates and visible wastes are available in chrome, brushed nickel, brushed brass, brass, matte black and stainless steel. Chrome remains the default and the easiest finish to match across a range of tapware. The more reliable design approach is to match a waste or grate's finish to the room's tapware rather than its tiles, since tapware finish is what the eye associates with "matching hardware" in a bathroom; a waste in the same finish as the tapware reads as deliberate, even in a fixture that's easy to overlook.

What to look for when selecting a drain

Beyond finish, a drain should carry Australian Standard approval and a manufacturer's warranty, often around five years, subject to specific conditions. Flow rate is also worth checking for shower drainage specifically: a higher-flow-rate grate, such as a shower channel drain, handles more water without pooling underfoot, which matters more in a shower with a strong water flow or multiple shower heads.

Brands in this collection

This range includes Nero Tapware, Meir and Phoenix Tapware across popular finishes, along with Caroma and Fienza for basin and bath wastes. For linear and channel grates suited to larger showers, this collection also stocks Stormtech, an Australian brand specialising in linear drainage. Every product in this collection is WaterMark certified for installation in Australia.

What is the difference between a waste and a trap?

A waste is the visible drain fitting itself, in the floor, shower, basin or bath. A trap is the curved pipe beneath it that holds water to block sewer smells from entering the room. Most installations need both, and many wastes are sold with a matching trap included.

How do I drain water from my bathroom floor?

A bathroom floor drain, positioned at the lowest point of the floor, handles any overspill from a sink, toilet or shower running across the floor. Floor drains are generally smaller than shower drains, since they're designed for occasional overspill rather than the continuous water flow a shower drain manages.

Is a floor waste required in a bathroom?

This depends on state building regulations, and a qualified builder or plumber should confirm the requirement for a specific renovation. Even where not strictly required, a floor waste protects against water damage from an overfilled sink, a plumbing fault, or general splashing, since it gives spilled water somewhere to go rather than pooling on the floor. Because a floor waste may see infrequent use, pouring a small amount of water down it periodically helps prevent the stagnant-water odour that can develop in a rarely used drain.

My drain smells, how do I clean it?

Remove the grate and clear out any hair or debris built up around the opening, then pour a small amount of boiling water down the drain. For a more thorough clean, add vinegar and baking soda to the drain, leave it for a minute, then flush with boiling water. This clears residual buildup and odour without needing a commercial drain cleaning product. Clean the grate itself before replacing it.

Completing the room

Wastes and traps are easiest to finalise once the tapware finish for the room is settled, since matching a waste or grate to that finish is what keeps the detail reading as considered rather than incidental. The Blue Space's Tapware and Showers collections are worth reviewing alongside a waste or trap selection, so the finished room carries one consistent finish from the tap through to the drain.