Tap Materials Compared
Brass vs Stainless Steel vs Zinc Alloy vs Plastic (2026)

Why the body matters more than the finish

Polished chrome, brushed nickel and matt black are coatings. The chrome plating article lists the base materials that get plated: steel, aluminium, plastic, copper alloys and zinc alloys. Two taps that look identical in the shop can have very different bodies underneath, and the body decides how the tap copes with years of water, cleaning products and knocks.

The basin tap types guide covers the shapes and finishes. This guide is about what is under the finish, the part you cannot see in the box.

The four materials at a glance

Brass: the traditional tap body

Brass is the usual material for valve bodies and plumbing fittings. The brass article notes it is used where corrosion resistance and low friction are needed, including plumbing, valves and hose couplings. It machines cleanly into threads and seats, which is why a well-made brass tap feels solid and keeps its threads after years of use.

Two things to know. First, lead is often added to brass, in concentrations of about 2%, to make it easier to machine, and some of that lead can leach into water; some jurisdictions such as California now require lead-free materials on surfaces that touch drinking water. Second, ordinary brass can lose its zinc, covered next. A reputable maker states whether a tap uses lead-free or low-lead brass.

Dezincification and DZR brass

Dezincification is the slow leaching of zinc out of brass, leaving a weak, porous copper shell. The selective leaching article describes it in brass containing more than 15% zinc in the presence of oxygen and moisture, for example from brass taps in chlorine-containing water, and says stagnant or slow-moving water tends to promote it. The cure is in the alloy: dezincification-resistant (DZR) brass is made for drinking-water fittings.

In practice dezincification shows as white crusting or a pinkish colour at joints, threads that crumble when the tap is removed, or a fitting that weeps where the metal has turned porous. It is a reason to replace the fitting, not to re-tighten it.

Stainless steel taps

Stainless steel resists corrosion because of its chromium. The stainless steel article gives the threshold: a chromium content of 10.5% or more forms a passive film that protects the metal and repairs itself when exposed to oxygen. Grades 304 and 316 are the common austenitic types. Because the material is the same all the way through, a brushed stainless tap has no plating to peel.

Stainless taps cost more to make because the metal is harder to cast and machine into complex shapes, so simple, solid stainless designs are more common than ornate ones. Brushed stainless shows water marks more than polished chrome. Outdoors, the outdoor tap guide recommends a solid brass or stainless tap with a hose connector.

Zinc alloy: the cheap tap under the chrome

Many low-cost taps and fittings are die-cast zinc alloy. The zamak article describes the family: zinc with aluminium, magnesium and copper, distinguished by a constant 4% aluminium, most commonly die-cast and easy to electroplate. That makes it ideal for decorative shapes at low cost.

The weakness is what happens when the plating is breached. The bathroom accessories guide notes that chrome-plated zinc looks bright on day one, but once the coating is scratched the metal underneath corrodes in a humid bathroom. Threads cast in zinc are also weaker than machined brass threads, so connections are easier to strip.

Plastic taps and where they belong

Plastic taps, often ABS, sometimes chrome-plated, are light and cheap and will not rust. The ABS article notes the material is damaged by sunlight, and the outdoor tap guide warns that cheap plastic taps crack in the sun. Indoors, out of direct sun and away from heavy use, a plastic tap can do a modest job, for example a utility point that is rarely used. It is not a good choice for a busy kitchen, a shower or an outdoor wall.

How to tell what a tap is made of

• Weight. Solid brass and stainless are noticeably heavier than plated zinc or plastic of the same size; the cabinet handles guide uses the same test for hardware.
• The material statement. A reputable maker names the body material and whether the brass is lead-free or dezincification-resistant. A box that only says “chrome” is describing the finish.
• The threads. Machined brass threads are crisp and heavy; cast threads look rough.
• A magnet. Common stainless grades such as 304 are austenitic and barely attract a magnet, so the magnet test alone will not separate stainless from brass; use it with the weight test.
• Spares. Ask whether a replacement cartridge is available for the model. A tap you can service lasts longer than one you must throw away.

The parts inside matter too

A good body with a poor cartridge still drips. Most modern mixers use a ceramic disc cartridge; the dripping tap guide explains when to change the washer or cartridge and when a new tap is the better fix. The flexible hoses and the angle valve under the basin are part of the job as well; the angle valve and flexible hose guide covers why old hoses burst. If the water itself is brown or rusty, the cause is usually the pipes, the tank or the heater rather than the tap; see the rusty tap water guide.

What a tap change costs

ClickBina's published tap guides give these figures (indicative 2026, Klang Valley). The tap itself is extra where labour only is shown:

How ClickBina can help

WhatsApp us your job details for a quote: how many taps, where they are, and whether the basin, sink or wall is changing too. ClickBina is an experienced KL & Selangor contractor for whole-house refurbishment and trade coordination, so taps, hoses, basins and tiling can be planned together. We reply within the hour, and the price agreed is a flat price with no hidden charges. A site visit is RM150, waived if you go ahead. See also kitchen sink and tap types.

Sources & methodology

• Wikipedia: Chrome plating — the base materials that are plated.
• Wikipedia: Brass — uses in plumbing; lead added at about 2% for machining; lead-free rules.
• Wikipedia: Selective leaching — dezincification above 15% zinc; DZR brass for drinking water.
• Wikipedia: Stainless steel — 10.5% chromium threshold; grades 304 and 316.
• Wikipedia: Zamak — zinc alloy composition, die-casting and plating.
• Wikipedia: Acrylonitrile butadiene styrene — ABS is damaged by sunlight.
• ClickBina basin tap, dripping tap, outdoor tap, bathroom accessories and cabinet handles guides — prices and practical advice.

Methodology: material facts are from the encyclopaedia articles named; prices are ClickBina indicative 2026 Klang Valley ranges from the guide named beside each. No brand is rated.