Zinc Alloy Shower Mixer Spare Knob

Replace a worn or broken diverter handle with this robust Zinc Alloy Shower Mixer Spare Knob, designed for reliable daily use and a secure grip. Manufactured from high-grade zinc alloy with a multi-layer chrome finish, the component resists corrosion, scratching, and tarnishing even in high-humidity bathroom environments. Its universal splined socket fits most standard shower mixer valve spindles, making it an ideal direct replacement for cartridge-style and ceramic disc setups. To complete the look and function of your entire shower station, complementary parts are available in the same durable alloy: the Zinc Alloy Shower Control Lever allows smooth temperature and flow adjustment, the Zinc Alloy Bath Tap Switch Knob offers precise diverter operation on bath/shower combinations, the Zinc Alloy Shower Valve Hand Grip provides an easy-to-turn hand wheel for thermostatic mixers, and the Zinc Alloy Bath Faucet Operating Lever delivers a sleek single-lever action for basin or bath fillers. Each part is crafted to the same exacting standards, ensuring a cohesive appearance and consistent tactile feedback throughout your bathroom fittings.

The Zinc Alloy Shower Mixer Spare Knob is engineered to deliver effortless control over your shower diverter, allowing you to switch between overhead rainfall, handheld spray, and bath spout with a simple quarter-turn motion. Its ergonomic, cross-hatched profile reduces finger slip when hands are wet or soapy, while the concealed grub screw mounting keeps the install tidy and tamper-resistant. The knob’s internal brass insert reinforces the spline connection, preventing rounding over time and maintaining a backlash-free fit with the cartridge stem. A thermoplastic index cap with embossed directional markings further enhances usability, clearly indicating hot, cold, and diverter positions without fading. Designed for both new installations and retrofits, this spare knob mates with 20‑tooth or 28‑tooth broach patterns commonly found in European and Australian plumbing systems, and is supplied with a set of adaptor rings to eliminate guesswork during replacement.

Detailed Specifications

• Body material: Die-cast zinc alloy ZAMAK 3, chrome-plated to ASTM B456 SC2 standard
• Insert: Precision-machined brass bush for spline protection and long-term dimensional stability
• Spline type: Universal 20‑tooth / 28‑tooth broach, adaptable with included nylon reducing rings
• Overall diameter: 55 mm knob head, 38 mm base skirt
• Depth (cap to mounting face): 42 mm
• Finish options: Polished chrome, brushed nickel, matte black
• Mounting method: Side-fix grub screw (M4 Allen key supplied)
• Operating rotation: 90° quarter-turn or 180° diverter, depending on valve type
• Indexing: White/grey thermoplastic cap with laser-etched symbols, UV and steam resistant
• Compatible valve diameters: Fits spindles with 8–10 mm major diameter spline
• Temperature range: Withstands 1‑80°C continuous exposure without deformation
• Warranty: 5-year manufacturer guarantee against manufacturing defects

Performance & Dimensional Data

Installation Guidelines

• Shut off main water supply and drain residual pressure before removing old knob.
• Check the valve spindle spline count; choose the correct adaptor ring supplied.
• Slide the Brass Insert Shower Knob onto the spindle, ensuring full engagement of splines.
• Tighten the M4 grub screw firmly using the included Allen key – do not overtighten beyond 2 N·m.
• Press the index cap into the recess until it snaps securely; align markings to match valve positions.
• Restore water supply and operate the diverter several times to verify smooth switching.
• Periodically clean the knob with mild soapy water and a soft cloth; avoid abrasive cleaners that can dull the chrome finish.
• If the knob becomes loose, simply re-tighten the grub screw; the brass insert prevents thread stripping.