1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your KOHLER Vox Square Vessel Bathroom Sink. Please read these instructions thoroughly before beginning installation or use to ensure optimal performance and longevity of your product. The Vox Square vessel-style sink is designed for countertop installation, featuring a symmetrical, deep basin and rounded edges, crafted from durable vitreous china.

Image 1.1: The KOHLER Vox Square Vessel Bathroom Sink, Model 2661-0, shown installed on a countertop.
2. Safety Information
- Always turn off the water supply before beginning any plumbing work.
- Wear appropriate personal protective equipment (PPE), such as safety glasses and gloves, during installation.
- Handle the vitreous china sink with care to prevent chipping or breakage.
- If you are unsure about any installation steps, consult a qualified plumber.
- Ensure all connections are secure and watertight to prevent leaks.
3. Package Contents
Verify that all components are present before beginning installation:
- KOHLER Vox Square Vessel Bathroom Sink (Model 2661-0)
- Installation hardware
- Cut-out template (if applicable)
Note: Faucet and drain assembly are sold separately and are not included with the sink.
4. Setup and Installation
The KOHLER Vox Square Vessel Sink is designed for countertop installation. It does not feature faucet holes, requiring a wall-mount or counter-mount faucet.
4.1 Pre-Installation Steps
- Review Codes: Consult local plumbing and building codes to ensure compliance.
- Prepare Countertop: Use the provided cut-out template to mark and cut the opening in your countertop for the sink and drain. Ensure the opening is smooth and free of debris.
- Check Clearance: Verify adequate clearance for your chosen wall-mount or counter-mount faucet and drain assembly.

Image 4.1: Dimensional diagram of the KOHLER Vox Square Vessel Bathroom Sink.
4.2 Installation Procedure
- Install Drain Assembly: Install the pop-up drain assembly (purchased separately) into the sink according to the drain manufacturer's instructions. Apply a bead of plumber's putty or silicone sealant around the drain opening on the underside of the sink before securing the drain flange.
- Position Sink: Carefully place the sink into the prepared countertop opening. Ensure it is centered and level.
- Secure Sink: Apply a continuous bead of silicone sealant around the perimeter of the sink's base where it meets the countertop. Press the sink firmly into place. Remove any excess sealant immediately.
- Connect Plumbing: Connect the drain trap and water supply lines to your faucet (if not already installed). Ensure all connections are hand-tightened, then use a wrench for a final quarter-turn, being careful not to overtighten.
- Test for Leaks: Turn on the water supply and check all connections for leaks. Run water into the sink and observe the drain connections.

Image 4.2: The vessel sink seamlessly integrated into a bathroom vanity with a wall-mounted faucet.
5. Operating Instructions
The KOHLER Vox Square Vessel Bathroom Sink operates like any standard bathroom sink. Water flow is controlled by your chosen faucet (wall-mount or counter-mount). The sink's deep basin is designed to minimize splashing and provide ample washing space.

Image 5.1: Interior view of the sink, highlighting the drain and material finish.
6. Maintenance
To maintain the pristine appearance and functionality of your KOHLER Vox Square Vessel Bathroom Sink, follow these simple maintenance guidelines:
- Regular Cleaning: Clean the sink regularly with a soft, damp cloth and a mild, non-abrasive cleaner. Rinse thoroughly and wipe dry with a soft cloth to prevent water spots.
- Avoid Harsh Chemicals: Do not use abrasive cleaners, scouring pads, or harsh chemical cleaners (e.g., drain cleaners, strong acids, or alkalis) as these can damage the vitreous china finish.
- Prevent Stains: Promptly wipe away any spills, especially those from cosmetics, hair dyes, or other staining agents.
- Inspect for Leaks: Periodically check the plumbing connections under the sink for any signs of leaks or drips. Tighten connections as needed.
7. Troubleshooting
Here are solutions to common issues you might encounter:
| Problem | Possible Cause | Solution |
|---|---|---|
| Water leaks from connections | Loose plumbing connections or worn seals. | Tighten connections. Replace seals or O-rings if necessary. Ensure plumber's putty or sealant is properly applied. |
| Slow drainage | Partial clog in the drain or trap. | Remove and clean the pop-up drain stopper. Clear any debris from the trap. Avoid pouring grease or harsh chemicals down the drain. |
| Sink appears dull or stained | Mineral deposits from hard water or residue from cleaning products. | Use a non-abrasive cleaner specifically designed for vitreous china. For stubborn mineral deposits, a solution of vinegar and water can be used, followed by thorough rinsing. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Kohler |
| Model Number | 2661-0 |
| Material | Vitreous China |
| Color | White |
| Overall Dimensions (W x L x H) | 16-1/4" W x 16-1/4" L x 6.73" H (413 mm x 413 mm x 171 mm) |
| Bowl Depth | 6-3/4" (170 mm) |
| Installation Type | Countertop (Vessel) |
| Faucet Holes | None (requires wall- or counter-mount faucet) |
| Drain Type | Pop-Up (drain assembly sold separately) |
| Item Weight | Approximately 1 pound (454 Grams) |

Image 8.1: Technical drawing with detailed dimensions for the KOHLER Vox Square Vessel Bathroom Sink.
9. Warranty Information
This KOHLER product is covered by a One-Year Limited Warranty. This warranty covers defects in material and workmanship under normal use and service. For complete warranty details, terms, and conditions, please refer to the official KOHLER website or contact KOHLER customer service.

Image 9.1: KOHLER warranty badge, symbolizing product quality and assurance.
10. Support
For further assistance, technical support, or to purchase replacement parts, please visit the official KOHLER website or contact KOHLER customer service directly. You can find contact information and additional resources on their website.
KOHLER Website: www.kohler.com