Alpha International U231-25 Stainless Steel Single Bowl Undermount Cutout
Description
The Alpha International U231-25 is a versatile 23-inch single bowl undermount sink designed for standard residential and light commercial applications. This mid-size configuration balances generous bowl capacity with reasonable countertop space requirements, making it suitable for galley kitchens, apartment installations, and traditional layouts. Our DXF template offers four precision cutout variants for professional fabricators working with granite, quartz, marble, and solid surface materials. The 18-gauge commercial-grade 304 stainless steel construction provides long-term durability, while the premium satin finish resists water spotting and fingerprints. Round corners with 1.063-inch radius facilitate easy cleaning and add visual refinement.
Dimensions
- Overall Width
- 23"
- Overall Depth
- 18"
- Bowl Width
- 21"
- Bowl Depth
- 16"
- Corner Radius
- 1.063"
Specifications
- Manufacturer
- Alpha International
- Model Number
- U231-25
- Installation Type
- Undermount
- Bowl Configuration
- Single
- Material
- Stainless-Steel
- Min. Cabinet Width
- 26"
- Downloads
- 0
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The Alpha International U231-25 is a versatile 23-inch single bowl undermount sink designed for standard residential and light commercial applications. This mid-size configuration balances generous bowl capacity with reasonable countertop space requirements, making it suitable for galley kitchens, apartment installations, and traditional layouts. Our DXF template offers four precision cutout variants for professional fabricators working with granite, quartz, marble, and solid surface materials. The 18-gauge commercial-grade 304 stainless steel construction provides long-term durability, while the premium satin finish resists water spotting and fingerprints. Round corners with 1.063-inch radius facilitate easy cleaning and add visual refinement.
Installation Overview
The Alpha U231-25 fits standard 26-inch minimum cabinet widths, making it compatible with most base cabinet configurations. The template provides four installation options: no reveal (21x16-inch cutout for maximum bowl exposure), 1/8-inch reveal (20.75x15.75-inch cutout for balanced aesthetics and support), 1/2-inch overhang (20x15-inch cutout for maximum stone support), and drop-in variant (23x18-inch cutout for top-mount installation). For professional stone fabrication, the 1/8-inch reveal represents the optimal choice for 3cm granite and quartz, providing clean visual lines while maintaining structural integrity. The 9-inch bowl depth accommodates large cookware and commercial spray faucets. Stainless steel mounting clips attach directly to the sink's exterior channel, though many fabricators prefer two-part epoxy systems for superior long-term bonding. The undercoated insulation with rubber padding significantly reduces operational noise, an important consideration for open-concept residential spaces. The 3.5-inch drain opening works with all standard disposal units and basket strainers. Round corners improve sanitation and reduce food particle accumulation compared to sharp radius designs.
CNC Cutting Notes
This template delivers production-ready geometry extracted from manufacturer DXF files with confirmed dimensional accuracy. The file structure is optimized for CNC processing with minimal entity count and clean vector paths on standard layers. All measurements are in inches, verified against manufacturer specifications. The 1.063-inch corner radius requires appropriate tool selection - we recommend 1/2-inch diameter or smaller bits for accurate reproduction. Consider using a 3/8-inch ball nose for the smoothest corner finish on polished edges. The single-bowl configuration eliminates complex internal geometries, allowing straightforward toolpath programming with continuous perimeter cutting. Program appropriate tool offset compensation based on your specific bit diameter and desired reveal dimension. For waterjet cutting, this template works equally well, though you may want to add corner lead-ins to prevent witness marks at the start point. The medium size makes this template ideal for nested layouts, allowing efficient material usage when cutting multiple sinks from a single slab.
Material Compatibility
This undermount template accommodates all common countertop substrates with appropriate variant selection. For 3cm granite and quartzite, use the 1/8-inch or 1/2-inch reveal variants depending on desired aesthetics and edge exposure preferences. The natural strength of granite supports minimal reveals without structural concerns. Quartz and engineered stone installations should favor the 1/2-inch overhang variant, as these materials can be more susceptible to edge chipping without adequate support. The added overhang distributes stress and reduces the risk of micro-fractures during sink installation and use. Marble countertops benefit from maximum overhang to protect the more delicate stone edges from impact damage and moisture exposure. For 2cm materials, always use the 1/2-inch overhang or consider laminating to 3cm thickness for better long-term performance. Solid surface materials work well with this template using moderate reveals. The stainless steel finish complements both light and dark stone colors, from Carrara and Calacatta patterns to absolute black and dark granites. Laminate countertops should only use the drop-in variant.
Where to Buy
The Alpha International U231-25 is available through plumbing wholesalers, kitchen and bath showrooms, and online retailers specializing in stainless steel sinks. Typical retail pricing ranges from $140-180 depending on supplier and quantity discounts for professional fabricators. When ordering, verify the exact model number U231-25 to ensure proper sizing, as Alpha offers similar models with different dimensions. The sink ships complete with stainless steel mounting clips and a paper template, though professional installers prefer our precision DXF files for CNC accuracy. Volume pricing may be available for fabrication shops and contractors through distributor networks. Check local plumbing supply houses for immediate availability, or order direct from online retailers for competitive pricing with standard shipping timeframes.