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Stainless Steel Stormwater Grates and Hidden Linear Drains for Concrete Surfaces

Surface water has to go somewhere. On a concrete pool surround, alfresco area, courtyard or driveway, that means a drainage grate or linear drain set into the finish. Most projects use the cheapest grate available, and most of those projects end up with a corroded, discoloured, mismatched piece of hardware that nobody wanted on display.

Stainless steel changes that. Done properly, with 316L marine-grade construction and powder-coated finishes matched to the surrounding surface, a stormwater drain becomes part of the design rather than an interruption to it. We supply the full range, from compact 150×150mm point drains through to 1000mm hidden linear drains, all manufactured in 316L stainless steel and built to outlast the slab they sit in.

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The Hero

1000×150mm Hidden Linear Stormwater Drain

The 1000mm Hidden Stormwater Drain is the flagship of our drainage range. Built from 316L marine-grade stainless steel, it sits flush into a concrete or paved surface with a recessed channel that accepts wet-pour concrete or paving infill to match the surrounding finish.

Once installed, the drain reads as a thin line in the surface rather than a piece of hardware. The same idea the market loves on our hidden pool skimmer lids, applied to surface drainage.

Where this works

  • ✓ Pool surrounds where conventional grates ruin a polished, honed or exposed aggregate finish.
  • ✓ Alfresco and courtyard areas built with premium paving or tiles.
  • ✓ Architectural entries, stepped driveways and feature paths where the surface matters.
  • ✓ Commercial fitouts and high-end residential builds where every detail is specified.

A single 1000×150mm hidden linear drain replaces three or four conventional point grates running across the same channel. The result looks better, costs roughly the same once labour is factored in, and lasts decades rather than seasons.

The Full Stainless Steel Stormwater Grate Range

Every product in the range is rated for foot traffic and uses 316L stainless construction. All ship Australia-wide from our Perth warehouse.

Why 316L Marine-Grade Stainless Steel

Not all stainless steel performs the same outdoors. Standard 304 stainless is fine for indoor and sheltered applications. Once you put it outside in salt air, near a chlorinated pool, or in standing stormwater, you see pitting and discolouration within a few seasons.

Grade 316L contains molybdenum and uses low-carbon steel, giving it substantially better resistance to chloride corrosion than 304. For drainage hardware that sits in standing water, gets splashed by pool chemistry or operates in Perth’s coastal conditions, 316L is the only specification that makes sense.

We back every drainage product in our range with a manufacturer warranty because the material does the work. Inferior grates get replaced twice in the same period. 316L gets installed once.

Powder-Coated Finishes

Black, White or High-Polished

A bright stainless grate works in some settings, but most modern concrete and paving installs benefit from a powder-coated finish that ties into the surface tone. The powder coating is bonded to the 316L substrate, not a paint finish that wears off — the grate keeps full corrosion resistance while reading as a clean, finished detail at the surface.

White Powder-Coated 316L

For light pavers, white-mix exposed aggregate, limestone and polished light concrete.

Black Powder-Coated 316L

For dark stone, charcoal aggregate, slate, basalt and dark polished concrete.

High-Polished Stainless

For contemporary builds where the grate is part of the design statement, not hidden by it.

Specifying and Installing in the Pour

A flush stainless drain is straightforward to install during a fresh concrete pour. The grate frame sets into a formed channel at the correct depth, the surrounding concrete is poured to grate level, and the drain commissions with the rest of the surface.

What we tell every builder, concreter and pool contractor:

  • 1Confirm the drainage run, fall and discharge before specifying the grate. Get the hydraulics right first, then choose the hardware.
  • 2Set the frame level with the intended finish, not the slab edge. A 30mm exposed aggregate topping needs the frame at the right depth.
  • 3Match the powder-coat colour to the actual surface, not the swatch. Send us a photo of the paver or aggregate and we will help confirm the closest finish.
  • 4Use stainless-compatible fasteners and sealants only. Mixed-metal contact starts corrosion that did not need to happen.
  • 5Avoid acid wash near 316L stainless during surface cleaning. Acid wash residue is one of the fastest ways to damage stainless that would otherwise last 20 years.

Who We Supply

Stainless steel stormwater grates and hidden drains are specified across three main customer groups. If you are already running our hidden pool skimmer lids or inspection lids on a project, the stormwater drains in this range are the natural companion — same 316L spec, same flush-finish principle, same supplier.

Pool Builders & Landscapers

Integrating drainage into pool surrounds, alfresco areas and feature paving where the surface matters.

Concreters & Paving Contractors

Specifying premium hardware on architectural and high-end residential builds with polished, honed or exposed-aggregate finishes.

Builders & Homeowners

Replacing failed plastic or budget grates on existing concrete with 316L stainless that lasts decades, not seasons.

Browse the Full Stormwater Range

All 11 products in our 316L stainless steel stormwater range — flagship hidden linear drain, 150×150mm and 190×150mm grates in three powder-coated finishes, and the sealed sump drain set.

Browse the Range or Request a Quote

Every product ships Australia-wide from our Perth warehouse with careful packaging to protect the finish. If you need help specifying the right grate, finish or size for your project, our team will run through it with you. We work with builders, trades and homeowners every day, and we would rather you order once and get it right than guess and reorder.

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