Double Bowl Integrated Basin

Double Bowl Integrated Basin
Product Introduction:
Double bowl integrated basins combine a dual-basin configuration with a continuous vanity countertop into a single monolithic unit. Eliminating structural joint seams between drop-in sinks and stone countertops removes the primary maintenance vulnerability prone to mold accumulation and water seepage. Manufactured for high-traffic commercial washrooms, hospitality developments, and multi-family residential projects, these units streamline on-site installation labor and meet commercial hygiene standards. Sourced directly from our manufacturing facility, units support custom dimensional scaling, modular vanity integration, and private-label packaging matching exact architectural specifications.
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Description
Technical Parameters

Double bowl integrated basins combine a dual-basin configuration with a continuous vanity countertop into a single monolithic unit. Eliminating structural joint seams between drop-in sinks and stone countertops removes the primary maintenance vulnerability prone to mold accumulation and water seepage.


Manufactured for high-traffic commercial washrooms, hospitality developments, and multi-family residential projects, these units streamline on-site installation labor and meet commercial hygiene standards. Sourced directly from our manufacturing facility, units support custom dimensional scaling, modular vanity integration, and private-label packaging matching exact architectural specifications.

 

Technical Specifications

 

Parameter Category

Specification Details

Industrial Standard / Tolerance

Available Materials

Solid Surface (Modified / Pure Acrylic), Engineered Quartz Composite, Vitreous China

ISO 19712 / ASTM F462 compliance

Standard Lengths

1200mm, 1500mm, 1800mm, 2000mm (Custom lengths up to 3000mm available)

$\pm 1.5\text{ mm}$

Standard Widths

460mm, 480mm, 520mm

$\pm 1.0\text{ mm}$

Basin Depth

120mm to 150mm (Commercial or residential profiles)

$\pm 2.0\text{ mm}$

Surface Finish

Matte (600-grit wet polish), Glossy (1200-grit buffed)

Ra $\le 0.4\,\mu\text{m}$

Water Absorption

$< 0.05\%$ (Solid Surface / Quartz)

ASTM C373

Load-Bearing Capacity

Withstands up to 150 kg downward vertical load at front edge without structural deflection

Tested per ASME A112.19.2

Drain & Overflow

Standard 45mm waste outlet; optional concealed overflow slot or non-overflow setup

Precision CNC-milled ports

Faucet Configuration

Single-hole, 3-hole (4-inch / 8-inch centers), or custom un-drilled for wall-mount faucets

$\pm 0.5\text{ mm}$ position accuracy

 

Product Advantages


Seamless Monolithic Structure: Compression-molded or vacuum-cast as a single body, eliminating silicone joints where bacteria and mildew accumulate in multi-piece assemblies.


Rigid Dimensional Stability: Controlled resin-to-mineral filler ratios prevent thermal warping and ensure flat mounting edges sitting flush against frames without rocking.


Optimized Drainage Gradient: Basin floors feature a calibrated 2-degree slope converging toward the center or rear waste outlet, preventing standing water and mineral scale buildup.


Restorable Surface Integrity: Solid surface variants allow minor scratches, chemical burns, or stains to be mechanically sanded out and re-buffed on-site, extending asset lifecycles.


Chemical and Stain Resistance: Non-porous matrices resist commercial cleaning agents, hair dyes, acetone, and cosmetic oils without surface degradation.

 

Installation Requirements


Cabinet Support Framework: Vanity base cabinets or wall-mounting steel brackets must support the total dead weight (45 kg to 90 kg) plus a 150 kg dynamic load rating.


Wall-Clearing Tolerances: Allow a 3mm expansion gap on each side for wall-to-wall installations. Seal perimeter joints with neutral-cure structural silicone.


Thermal Expansion Buffer: Avoid clamping fixing screws rigidly into pre-drilled under-slots without rubber washer interfaces; allow movement capacity for lengths exceeding 1500mm.


Drainage Plumbing Alignment: Pre-plan dual trap assemblies or central manifold kits behind the vanity skirt. Verify rough-in dimensions against CAD shop drawings prior to production.

 

Applications


Hospitality Guest Bathrooms: Mid-scale to luxury hotel chains requiring uniform double-vanity aesthetics across guest rooms.


Commercial Office Restrooms: High-traffic executive washrooms utilizing trough-style or dual integrated basins with wall-mounted sensor faucets.


Healthcare Facilities: Dental clinics and patient rooms requiring seamless, easy-to-sanitize surfaces meeting infection control protocols.


Multi-Family Residential Developments: Apartment complexes and condominium projects requiring standardized sizing for fast contractor installation.

 

OEM & ODM Customization


Dimensional Flexibility: Tooling adjustments accommodate non-standard countertop lengths, custom apron front depths, and asymmetrical basin placements.


Basin Geometry Variations: Select from rectangular, oval, semi-recessed, or trough-style basin molds integrated into the countertop platform.


Logo Integration: Laser-etched brand insignia on the underside or molded-in manufacturer marks for private label distribution.


Development Workflow:
Client supplies 2D/3D CAD drawings (STEP, IGES, or PDF).


Engineering team reviews structural feasibility and drainage slopes within 48 hours.


CNC aluminum mold fabrication or master plug creation (lead time: 10–15 business days).


Prototype sampling and physical stress testing prior to mass production sign-off.

 

Quality Control


Raw Material Testing: Incoming mineral fillers (aluminum hydroxide ATH) and unsaturated polyester resins undergo batch testing for purity, viscosity, and particle size distribution.


Curing Process Control: Automated thermal-curing ovens maintain strict temperature profiles to ensure complete cross-linking of polymer chains, preventing internal stress fractures.


Flatness and Dimension Inspection: Units are mounted on granite inspection tables; laser gauges verify surface flatness tolerances ($\le 0.5\text{ mm}$ across diagonal) and edge squareness.


Vacuum Load Testing: Random samples undergo structural deflection tests under simulated heavy loads to verify anti-cracking thresholds.


Visual Defect Screening: Inspection under 5000-lux LED lighting panels identifies micro-pitting, color inconsistencies, or surface blemishes prior to crating.

 

Packaging & Export


Export-Grade Crating: Units are wrapped in EPE foam protective sheeting, edge-protected with molded high-density polyethylene corners, and packed inside fumigation-free plywood crates or honeycomb cartons.


Palletization: Crates are secured onto ISPM 15-compliant heat-treated wooden pallets using heavy-duty tensile strapping for fork-lift handling and multi-tier container stacking.


Container Loading Optimization: Standardized packaging dimensions maximize 20GP and 40HQ container volumetric efficiency, maintaining transit damage rates below $0.1\%$.


Shipping Documentation: Full commercial invoice, packing list, certificate of origin, fumigation certificates, and loading photographs provided with every shipment.

 

FAQ

 

Q: What is the standard MOQ for custom-sized double bowl integrated basins?

A: The minimum order quantity for custom mold development or non-standard dimensions is 50 units per SKU. Trial orders starting at 10 units are accepted for standard catalog dimensions.

Q: Can these basins accommodate wall-mounted faucets instead of deck-mounted ones?

A: Yes. Basins can be manufactured with zero pre-drilled faucet holes for wall-mounted spout configurations, or customized with specific hole diameters and spacing.

Q: How are hairline scratches repaired on solid surface integrated basins?

A: Minor surface scratches are removed using waterproof sandpaper (grit 400 followed by 600) and buffing compound. Deeper gouges are filled with matching repair kits and wet-sanded flush.

Q: What certifications do your integrated basins carry for the North American and European markets?

A: Products comply with cUPC standards for North America and CE (EN 14688) requirements for Europe. Test reports and certification documents are available upon project request.

Q: What is the standard production lead time for bulk container orders?

A: Standard production runs require 25 to 35 days from receipt of deposit and technical drawing approval. Repeat orders or stock items ship within 15 days.

 

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