PrimaSink PS-1812W – 18" x 12" Rectangular Undermount Vanity Sink, White
The PrimaSink PS-1812W is a rectangular undermount vanity sink in glossy white vitreous china, with an 18-1/2" x 12-3/8" bowl and a 20-3/4" x 14-5/8" footprint. Its high-fired, acid- and alkali-resistant glaze wipes clean and pairs naturally with stone, quartz, and solid-surface countertops, mounting seamlessly beneath the counter for a rimless finish. A built-in overflow and center drain complete the basin, and a cutout template is included for installation.
Features
- Premium vitreous china with a high-fired, acid- and alkali-resistant glaze for easy cleaning
- Undermount installation for a seamless, rimless look beneath stone or quartz tops
- Built-in overflow helps prevent water from spilling over the rim
- Center drain with a 1-1/4" opening; pairs with a standard pop-up drain (sold separately)
- No faucet holes – use with any deck- or wall-mounted faucet
- Fits a minimum 21" base cabinet; cutout template included
- IAPMO certified to ASME A112.19.2-2018 / CSA B45.1-18; backed by a limited lifetime warranty
| Property | Detail |
|---|---|
| Brand | PrimaSink |
| Model | PS-1812W |
| Sink type | Undermount vanity sink |
| Shape | Rectangular |
| Material | Vitreous china (glazed ceramic) |
| Finish / Color | Glossy white |
| Overall dimensions | 20-3/4" L x 14-5/8" W |
| Bowl dimensions | 18-1/2" L x 12-3/8" W |
| Bowl depth | 6-1/4" to 8-1/4" |
| Drain | Center, 1-1/4" OD |
| Overflow | Yes |
| Faucet holes | None (undermount) |
| Minimum cabinet size | 21" |
| Cutout template | Included |
| Certification | IAPMO – ASME A112.19.2-2018 / CSA B45.1-18 |
| Warranty | Limited lifetime – see warranty details |
- Use the included template to confirm the countertop cutout before mounting.
- Secure with undermount clips and/or adhesive rated for your countertop material; support the basin until it fully cures.
- Fit a standard 1-1/4" pop-up drain using the gasket or plumber’s putty from your drain kit – do not overtighten.
- Clean with mild soap and a soft cloth. Avoid abrasive pads and harsh chemicals to preserve the glaze.
Vitreous china is durable but can chip under hard impact – avoid dropping heavy objects into the basin. Professional installation is recommended for undermount sinks. For full coverage terms, see the PrimaSink Limited Warranty.
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