Transforming your daily shower into a spa-like ritual starts with precise tactile control, and our Black Matt Shower Water Adjustment Knob is engineered to deliver just that. Designed to form a seamless visual and functional unit with a broader suite of matte black bathroom hardware, this knob fits right in with existing upgrades such as the Matte Dark Shower Operation Lever, which handles main flow diversion with the same subdued elegance. For sink and basin zones, the matched silhouette of the Non-gloss Black Bathroom Tap Controller extends the consistent design language across every water touchpoint in the room. The grip geometry draws inspiration from our acclaimed Matte Ebony Shower Valve Manipulating Grip, giving your fingertips a confident, slip-resistant interface even when hands are coated in soap or shampoo. To guarantee color fidelity across all fixtures, the electrodeposited matte coating is calibrated to the exact pigment density found on the Dull Black Bath Mixer Operating Piece, so there is no shade variation between your bath filler and your shower controls. The knob’s full brass core is shielded by a multi-layer corrosion barrier, tested under salt spray conditions exceeding 200 hours, ensuring that humidity and hard water deposits never compromise the velvety surface. The knurled rim features micro-grooves spaced at 1.2 mm intervals, a detail that provides subtle tactile feedback without feeling abrasive. Behind the escutcheon, a triple O-ring sealing system keeps moisture away from the valve stem, effectively preventing limescale buildup and internal dripping.
The Black Matt Shower Water Adjustment Knob is machined from a single forging of DR-grade brass, a material chosen for its superior structural density and natural antimicrobial properties. After the initial CNC profiling, the body undergoes a three-stage degreasing bath and an alkaline zincate treatment that creates an ideal adhesion profile for the matte black finish. That finish is built through a sequential deposition of semi-bright nickel, dark trivalent chromium, and a final electrophoretic clear coat, resulting in a non-reflective surface that rejects fingerprints, soap scum, and hard-water etching. The ergonomic taper shifts from a 48 mm front diameter to a 55 mm base flange, giving users enough leverage to adjust temperature and volume with minimal wrist effort. An inset stainless steel grub screw with a hex socket provides a rock-solid lock onto ¼-turn ceramic disc cartridges or traditional compression stems, and the included knurled adaptor ring allows retrofitting onto M28, M32, and ½-inch spline broaches without needing to replace the in-wall valve body. Independent thermal cycling tests—running from -20°C to 120°C over 5,000 cycles—confirmed zero structural deformation and no variation in torque resistance. That durability translates into a product that maintains its factory-indexed alignment and velvety rotation feel year after year, making the Black Matt Shower Water Adjustment Knob a long-term specification choice for both hospitality projects and high-traffic family bathrooms.
| Parameter | Value |
|---|---|
| Product Name | Black Matt Shower Water Adjustment Knob |
| Core Material | DR Brass (CW617N equivalent) |
| Finish System | 3-layer Matte Black (Ni + Cr³⁺ + E-coat) |
| Front Knob Diameter | 48 mm (1.89 in) |
| Base Flange Diameter | 55 mm (2.17 in) |
| Projection from Wall | 38 mm (1.50 in) inclusive of escutcheon |
| Stem Compatibility | M28×1.0, M32×1.0, ½-inch 20T spline, 16T broach |
| Set Screw Type | M4 stainless steel hex socket, 2.5 mm key included |
| Rotational Torque | 0.8 – 1.2 Nm (dry), consistent after 5,000 cycles |
| Corrosion Resistance | ASTM B117 salt spray > 200 hours without red rust |
| Operating Temperature | -20°C to +120°C (-4°F to +248°F) |
| Water Pressure Rating | Max 12 bar (174 psi) static |
| Net Weight | 0.46 lbs (208 g) including adaptor ring |
| Installation Clearance | Minimum 90 mm between knob centerlines |
| Certifications | NSF 61, ASME A112.18.1, WaterMark |
| Warranty | 10-year limited manufacturer warranty |
