316 Marine-Grade Stainless Steel Floor Waste Guide

A square tile-insert floor waste in 316 marine-grade stainless steel is built to resist corrosion in the wettest parts of a bathroom. The 316 grade is what sets it apart from ordinary stainless, and the tile-insert design lets it disappear into the floor. Here's what that buys you.

Why 316 grade matters in wet areas

Stainless steel comes in grades, and 316 — the marine grade — carries added molybdenum that makes it markedly more resistant to the chlorides and constant moisture found in showers and wet rooms. In practice that means less pitting and staining over the years than a lower grade would show. For a floor waste that lives under constant runoff, that corrosion resistance is the whole point.

The tile-insert advantage

A tile-insert waste has a shallow tray in its face that you fill with a matching cut of your floor tile, so the drain nearly vanishes into the pattern. It’s the tidiest option for a curbless or fully tiled shower where a chrome grate would interrupt the floor. Set the frame flush and fall the surrounding screed toward it so water clears quickly and nothing pools around the edges.

Choosing and coordinating

Confirm the outlet size and whether you need a centre or side outlet to suit your plumbing, and check the flow rate is adequate for a shower. A tile-insert waste is deliberately discreet, so the finish barely shows — the material grade is what you’re really paying for. To see square and tile-insert wastes alongside other fittings, browse the range of bathroom accessories at Just Bathrooms, a local showroom in the Illawarra region.