Alpha International U322 K Series Stainless Steel Single Bowl Undermount Cutout
Description
The Alpha International U322 K Series represents professional-grade undermount sink design for modern kitchen fabrication. This 31.75" x 20.5" double bowl configuration is constructed from commercial-grade 304 stainless steel with an 18 gauge thickness and premium satin finish. The equal-bowl design provides two identical workspaces measuring 29.75" x 18.5" with depths of 9" and 8", making it ideal for kitchens where homeowners need balanced functionality for washing and food preparation. Our production-ready DXF template includes four cutout variants: no reveal for seamless flush mounting, 1/8" reveal for standard undermount installations with edge tolerance, 1/2" overhang for maximum support and traditional aesthetics, and drop-in configuration for alternative mounting scenarios. The K Series designation indicates this model is part of Alpha International's professional line optimized for CNC fabrication workflows. The round corner style and 3.5" drain openings accommodate standard garbage disposal units and basket strainers. This sink requires a minimum 20" cabinet width, though optimal installation uses 24-27" cabinets for proper clearance and support. The premium satin finish resists water spotting and fingerprints while maintaining professional appearance over years of daily use.
Dimensions
- Overall Width
- 31.75"
- Overall Depth
- 20.5"
- Bowl Width
- 29.75"
- Bowl Depth
- 18.5"
Specifications
- Manufacturer
- Alpha International
- Model Number
- U322 K Series
- Installation Type
- Undermount
- Bowl Configuration
- Single
- Material
- Stainless-Steel
- Min. Cabinet Width
- 20"
- Downloads
- 0
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The Alpha International U322 K Series represents professional-grade undermount sink design for modern kitchen fabrication. This 31.75" x 20.5" double bowl configuration is constructed from commercial-grade 304 stainless steel with an 18 gauge thickness and premium satin finish. The equal-bowl design provides two identical workspaces measuring 29.75" x 18.5" with depths of 9" and 8", making it ideal for kitchens where homeowners need balanced functionality for washing and food preparation. Our production-ready DXF template includes four cutout variants: no reveal for seamless flush mounting, 1/8" reveal for standard undermount installations with edge tolerance, 1/2" overhang for maximum support and traditional aesthetics, and drop-in configuration for alternative mounting scenarios. The K Series designation indicates this model is part of Alpha International's professional line optimized for CNC fabrication workflows. The round corner style and 3.5" drain openings accommodate standard garbage disposal units and basket strainers. This sink requires a minimum 20" cabinet width, though optimal installation uses 24-27" cabinets for proper clearance and support. The premium satin finish resists water spotting and fingerprints while maintaining professional appearance over years of daily use.
Installation Overview
Installing the Alpha U322 begins with verifying cabinet compatibility and plumbing alignment for dual drain locations. Position the template on the countertop underside with at least 3" clearance from all edges to prevent stress fractures during cutting. For standard undermount installations, use the 1/8" reveal variant which provides 29.5" x 18.25" cutout dimensions. This reduces the opening by 0.25" compared to the bowl interior, creating a uniform lip that conceals minor cutting variations and provides clean visual lines. Mark the front edge orientation on the template before transferring to the stone to ensure proper bowl alignment. The sink ships with fixing clips and a paper template, but our DXF files deliver CNC-level precision for professional fabrication shops. After cutting, test-fit the sink to verify drain alignment with your rough-in plumbing. Both drain openings should be positioned identically unless otherwise specified. Apply 100% silicone sealant in a continuous bead around the entire cutout perimeter, keeping the bead 1/4" from the cut edge. Position the sink, apply even pressure to compress the silicone, then secure with mounting clips every 6-8" around the perimeter. Clips should be tightened gradually in a cross-pattern to prevent uneven stress. Allow silicone to cure for 24-48 hours before connecting plumbing and running water.
CNC Cutting Notes
The U322 DXF template uses decimal inch units with the origin point at the front-left corner of the cutout boundary. This model contains 57 entities including lines, arcs, and annotation text distributed across layers 0, DEFPOINTS, LABEL, and a Chinese character layer for manufacturer reference. When programming your CAM software, ensure all layers import correctly and verify that arc interpolation matches the round corner profiles. For granite cutting, use a 1/2" or 3/8" diamond router bit with continuous water cooling to manage heat and prevent micro-fractures. Recommended feed rates are 60-80 IPM for granite and 80-100 IPM for engineered quartz, adjusted based on material density and hardness. The no-reveal variant cuts to exact bowl dimensions (29.75" x 18.5"), leaving zero tolerance for measurement error. We recommend the 1/8" reveal variant for production work as it accommodates normal CNC calibration variance. When cutting the double bowl configuration, pay special attention to the narrow bridge between bowls, as this area experiences maximum stress during use. Ensure your vacuum hold-down or clamp positioning doesn't interfere with the cutout path. For inside corners, program relief cuts or use a smaller diameter bit to prevent stress concentration points that could propagate cracks over time.
Material Compatibility
This template is compatible with all standard countertop materials including granite, engineered quartz, quartzite, marble, and solid surface products. The large cutout dimensions (approximately 30" x 18.5" for the 1/8" reveal variant) require adequate material thickness and reinforcement. For granite installations, we recommend 3cm thickness with steel mesh or plywood support bars bonded beneath the cutout using structural epoxy. Position support bars perpendicular to the front edge, spanning from the cabinet frame to 2-3" beyond the rear cutout edge. Engineered quartz provides superior tensile strength compared to natural stone, but reinforcement is still advised for this size opening. Install undermount clips at 6-8" spacing, bonded to both sink rim and countertop underside with epoxy rated for stone applications. Marble is generally not recommended for kitchen sinks due to acid etching from common foods, but if specified by design requirements, seal all exposed edges with penetrating sealer before and after installation. Solid surface materials like Corian can be cut with carbide router bits and bonded directly to the stainless steel rim using manufacturer-approved acrylic adhesives. For ultra-compact surfaces (Dekton, Neolith), follow manufacturer guidelines for cutout radii and edge finishing. The stainless steel construction ensures chemical compatibility with all countertop materials.
Where to Buy
The Alpha International U322 K Series is available through professional kitchen and bath distributors, specialty plumbing showrooms, and online suppliers serving the trade market. Fabrication shops can order directly from Alpha International by calling 888-255-2574 or visiting alpha-int.com to locate authorized distributors in your region. The sink typically retails in the $250-$400 range depending on gauge options and finish specifications, representing excellent value for commercial-grade stainless steel construction. When ordering, verify the exact model designation (U322 K Series) to ensure you receive the correct bowl configuration and dimensions. The sink ships with mounting hardware, installation clips, and a paper cutout template, though professional fabricators should use our precision DXF files for CNC accuracy. Lead times vary by supplier but generally range from in-stock availability to 2-3 weeks for special orders. Alpha International also offers free DXF file downloads from their website technical resources section, allowing fabricators to verify dimensions before ordering the physical sink. For clients specifying this model, confirm drain positioning and whether garbage disposal will be installed, as this may affect bowl orientation preferences. The premium satin finish is standard on K Series models and requires no upgrade charges.