At PSDFaucetshttp://www.psdfaucets.com, we specialize in precision bathroom hardware production, covering kitchen & bathroom faucets, showers and full-range hardware accessories. We adopt a rigorous, standardized manufacturing process to craft every product, adhering to strict industry standards and craftsmanship requirements, dedicated to providing high-quality faucet and shower solutions for global clients.

Every piece of our products is crafted from scratch with uncompromising attention to detail, from premium raw material selection to stringent multi-item testing. We focus on both exquisite appearance and stable performance, ensuring all our bathroom hardware boasts long-lasting durability, and can meet the diverse needs of residential and commercial bathroom projects worldwide. To keep pace with the latest global bathroom hardware trends and innovations, we closely follow industry updates at the world’s leading sanitaryware exhibition ISH Frankfurt, integrating advanced design concepts into our production.

1. Premium Material Selection & High-Precision Casting: Foundation of Qualified Bathroom Hardware

The durability of all our products starts with top-tier raw materials, and brass is the core material for kitchen & bathroom faucets and showers for its excellent corrosion resistance, machinability and durability. We exclusively source high-purity H59/H62 brass, rust-proof 304 stainless steel and high-density zinc alloy—materials strictly screened for low impurity content, laying an unshakable foundation for high-quality bathroom hardware.

Our brass melting process is tailored to material properties: high-purity brass ingots are heated to 900-940℃ in sealed high-temperature furnaces, with intelligent temperature control and deoxidization treatment to ensure molten brass is pure, bubble-free and slag-free.

We adopt high-pressure die casting as the core brass casting process: preheated molds (150-200℃) are filled with molten brass under 80-120MPa high pressure for full cavity filling. For complex parts like faucet bodies, gravity casting is used when needed for better structural uniformity, ensuring blanks with uniform thickness and no internal defects.

2. CNC Precision Machining & Forming: Core Process for Precision Craftsmanship

Pinpoint accuracy is non-negotiable for flawless performance, and our CNC machining process is designed to achieve micron-level precision for every component.

Rigorous pre-machining preparation is conducted first: All brass, 304 stainless steel, and high-density zinc alloy blanks undergo structural integrity inspections to eliminate potential casting defects. Each blank is securely clamped onto custom-engineered fixtures—tailored to component geometries—to prevent micro-movement during machining. 3D models (for faucet spouts, ergonomic handles, shower bodies, and hardware fittings) are imported into advanced CAD/CAM software, with optimized cutting paths programmed to minimize waste while maximizing dimensional accuracy.

High-performance equipment is leveraged for the core machining stage: 5-axis and 3-axis CNC machining centers are deployed, paired with application-specific tools—tungsten carbide for brass and diamond-coated tools for stainless steel. The single-setup process integrates drilling (water flow channels/assembly holes), milling (intricate contours/mating interfaces), threading (leak-proof connections), and turning (cylindrical features such as spouts). 5-axis centers handle complex curved surfaces , while 3-axis models deliver high-efficiency precision for standard components.

A dual-layer precision control system is implemented: Every machining center operates with a strict tolerance of ±0.01mm (10 microns). In-process laser displacement sensors monitor accuracy in real time, automatically compensating for minimal deviations. Post-machining, each component undergoes CMM (Coordinate Measuring Machine) dimensional verification, with data logged to validate compliance with international design specifications. This meticulous workflow ensures perfect part interfit, laying the groundwork for seamless assembly and long-term operational reliability.

3.Deburring & Fine Polishing: Elevate Aesthetics of Sanitary Fixtures

Surface smoothness is critical to both the aesthetic appeal and functional reliability of our bathroom hardware—rough edges or uneven surfaces compromise plating adhesion and user experience, so a multi-stage process combining automated precision with meticulous craftsmanship delivers a flawless finish.

Targeted deburring and pre-polish preparation are conducted first: Post-CNC components undergo automated vibratory deburring with ceramic media to remove micro-burrs, sharp edges and machining tool marks. Intricate areas (e.g., faucet handle grooves, shower head nozzles) are refined via ultrasonic cleaning paired with precision handheld diamond files, ensuring all hard-to-reach spots are smooth and free of irregularities to create a uniform base for subsequent polishing.

Graded abrasive polishing is adopted for progressive refinement: The process advances from 400-grit coarse aluminum oxide abrasives to 800-grit medium and 1200-grit fine grades, using pressure-calibrated orbital polishers to prevent material over-removal. The final mirror finish is achieved with 2000-grit diamond polishing pads and high-gloss compound, delivering a scratch-free, highly reflective surface; specialized abrasive tools are applied for custom finishes (brushed nickel, antique brass) to ensure consistent texture across all production batches.

Stringent post-polish quality validation is enforced: Each component is inspected under LED light boxes to detect micro-scratches or unevenness, while surface roughness is verified via a profilometer with Ra (arithmetic mean deviation) controlled below 0.05μm—fully compliant with international sanitary fixture standards. This rigorous polishing workflow not only elevates product aesthetics but also optimizes electroplating adhesion, laying a solid foundation for long-lasting corrosion resistance.

4.Professional Electroplating: Corrosion Protection for Durable Fixtures

Electroplating is the cornerstone of both aesthetics and long-term corrosion protection for bathroom hardware. The full-cycle electroplating adheres to strict international plating standards, with 5 sequential, non-negotiable pre-treatment and plating stages ensuring uniform coverage, strong adhesion and superior corrosion resistance for every component:

✅ Degreasing: Multi-stage ultrasonic degreasing is performed with alkaline cleaning agents to thoroughly remove surface oils, grease, and machining residues; the process is temperature-controlled at 50–60℃ to enhance degreasing efficiency, laying a contamination-free foundation for subsequent plating procedures.
✅ Acid Pickling: Surface activation and oxide removal are realized via dilute sulfuric acid pickling, eliminating passivation layers, oxide scales and micro-corrosion spots on component surfaces; the pickling time is precisely controlled to avoid over-etching, ensuring a uniformly active surface for optimal plating adhesion.

✅ Nickel Plating: A high-purity semi-bright nickel underlayer is deposited via electroplating, with a controlled thickness of 8–12μm; this underlayer enhances plating uniformity, improves structural adhesion between substrate and topcoat, and serves as a primary corrosion barrier to extend the service life of the finished product.
✅ Chrome Plating: A hard, wear-resistant chromium topcoat is applied via decorative electroplating, with a thickness of 0.2–0.5μm for mirror finishes; the topcoat delivers exceptional scratch resistance, UV resistance and tarnish resistance, while providing the iconic bright, reflective surface (custom finishes available: brushed nickel, antique brass, gunmetal via specialized plating processes for diverse styling needs).
✅ Sealing Treatment: Post-plating passivation sealing is conducted using chromate-free sealing agents to seal micro-pores in the plating layer; this process locks in the corrosion resistance of the nickel-chrome coating, enhances scratch resistance and prevents white rust formation in humid environments, ensuring long-term plating integrity.

The electroplated coating is scratch-proof, rust-proof and fade-resistant, ensuring bathroom hardware retains its glossy, premium finish even after prolonged exposure to water and humidity. To validate corrosion resistance meeting daily use demands, all faucet and shower electroplated components pass the rigorous 24 or 48-hour neutral salt spray test (NSS) certified by SGS, with no rusting, blistering or peeling—fully complying with global sanitary hardware industry standards and satisfying residential & commercial application needs.

5. Core Valve Cartridge Assembly: Sealing & Stability of Faucets & Showers

The valve cartridge is the “heart” of kitchen & bathroom faucets and showers—key categories of our bathroom hardware—directly determining sealing performance and service life. We equip every piece with industry-leading high-precision ceramic valve cartridges, paired with food-grade rubber sealing rings for enhanced reliability.

All assemblies of bathroom hardware are completed by skilled technicians with strict torque control, ensuring a tight, leak-free fit between valve cartridge and valve body. This precision eliminates water leakage and ensures smooth, effortless regulation of water flow and temperature. For thermostatic showers and sensor faucets—specialized products—dedicated core components are calibrated to lock in consistent, stable functionality.

6. Strict Functional & Pressure Testing: 100% Qualified Bathroom Hardware

No bathroom hardware leaves our factory without passing rigorous, full-range quality testing. We implement a comprehensive inspection protocol in cooperation with SGS to eliminate defective units, covering all critical performance metrics:

✅ Pressurized Air Tightness Test: Components are subjected to 0.8MPa compressed air for 15 minutes with submerged pressure holding to detect micro-leakage; zero bubble emission is required to confirm absolute sealing integrity, eliminating latent leakage risks for long-term reliable use.
✅ High Water Pressure Test: Fully assembled fixtures undergo 1.6MPa static water pressure—2 times the standard domestic water pressure—for 30 consecutive minutes; the test verifies structural stability and pressure resistance of valve bodies, spouts and joints, with no deformation, seepage or rupture allowed to meet heavy-duty usage demands.
✅ Thermostatic Function Test (Thermostatic Models): Precision calibration is conducted for thermostatic cores to lock the optimal safe water temperature range of 38–40℃, with temperature fluctuation controlled within ±1℃; anti-scald protection performance is verified via sudden cold water cutoff simulation, ensuring outlet temperature does not exceed 48℃ to prevent accidental scalding.

✅ Sensor Function Test (Sensor Models): High-sensitivity infrared sensors are tested for response time (≤0.3 seconds) and induction range (20–35cm) to ensure rapid, accurate activation; stable water flow control and automatic shutoff functions are validated, along with low-power standby performance, achieving both user convenience and water-saving efficiency.
✅ Full Operation Test: End-to-end operational performance is inspected for all fixtures, including smooth 360° handle rotation with consistent torque, seamless shower spray mode switching, and linear flow adjustment from trickle to full flow; 5,000-cycle continuous operation testing is conducted to confirm long-term functional stability without jamming or loosening.

All test reports are issued and certified by SGS, and only bathroom hardware that passes all strict tests is packaged for shipment, ensuring every unit delivered is functionally flawless and quality-assured.

7. Finished Bathroom Hardware: Exquisite, Durable & Ready for Deployment

After 7 rigorous production stages and stringent quality checks, every kitchen & bathroom faucet, shower and piece of bathroom hardware is fully finished. What emerges is more than a functional bathroom accessory—it’s a precision-crafted product that balances sleek design, reliable performance and long-lasting durability.

Suitable for both residential and commercial projects, our bathroom hardware stands up to daily wear and tear, delivering consistent, elegant and reliable solutions to customers worldwide. As a professional bathroom hardware manufacturer focusing on this craft, we pride ourselves on crafting products that exceed industry standards and customer expectations, building long-term trust with global partners.