ALFI brand AB503UM-W 24 inch Single Bowl Fireclay Undermount Kitchen Sink


SKU: AB503UM-W Categories: , ,


AB503UM-W:ALFI brand fireclay sinks are a throwback to a simpler time. Designed to offer the traditional popular look of a farm sink with a contemporary twist. Made of the highest quality solid fireclay to ensure it not only looks great but also lasts for a very long time. This sink tapers from top to bottom by approx. 3/4″. Please note that our undermount fireclay sinks are fully glazed on all sides. This is because they are made using the same exact mold and process as our fireclay farm sinks but offered at a lower cost. You should have no issues under mounting these sinks as this is what they were designed for. They install just like a farm sink would, only without the exposed front apron. Inner Dimentions: 21 3/4″ x 13 3/4″ x 7″ and Thickness: 3/4″. This sink is constructed of solid high-grade fireclay material using high pressure casting, ensuring durability, longevity, and resilience to acids, alkali’s, scratches, and chipping. Mount the undermount installation kit (Model #: ABUMSB) to the inner side walls of your cabinet. We then recommend putting plywood on the rods to create a large smooth flat surface. Drill the necessary drain holes. If you did not purchase the kit you will need to create a custom support using 2×4’s. Due to the organic nature of the fireclay, material Dimentions may vary by 1/8″ of an inch. We recommend having the sink on location to trace and measure for countertop and cabinet cut outs. Furthermore , minor imperfections may appear. These are not defects; this is what makes each sink uniquely its own. Defective sinks will not pass our quality control inspection and would be recycled into a new sink at the factory. See ALFI brand sink AB503 for identical sink that also includes a smooth apron front for exposed apron installation. 3 1/2″ Rear Center drain. This fireclay sink is compatible for use with a garbage disposal. Certified by Uniform Plumbing Code (cUPC). Heat resistant up to 350′ F. This sink has been tested and will not crack due to heat exposure from a pot/pan up to 350′ F hot. CHILD SKUS AB503UM-B, AB503UM-W

Additional information

Dimensions16.13 × 23.38 × 8.00 in



Specs PDF

Installation Guide PDF






Item Weight


Box Weight




Item Type

Installation Type

Number of Bowls


Drain Placement

Drain Size

Faucet Holes

Has Overflow?


Bowl Depth


Inner Bowl

21 3/4" x 13 3/4" x 7"


cUPC Certified?