Introduction
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your Kohler Honesty K-37889-4-BL single-handle bathroom sink faucet. Designed with clean lines and square features, this contemporary faucet offers both sleek aesthetics and functional performance for your bathroom. It features a single lever handle for precise control of water flow and temperature, and durable ceramic disc valves for long-lasting, leak-free operation. The faucet includes a clicker drain with a 1-1/4 inch metal tailpiece and operates at a maximum flow rate of 1.2 gallons per minute (4.5 liters per minute) at 60 psi.
Image: Kohler Honesty K-37889-4-BL Single-Handle Bathroom Sink Faucet in Matte Black. This image displays the faucet's modern design and matte black finish.
Setup and Installation
Before beginning installation, ensure all necessary tools and components are available. Refer to the included parts list to verify all items are present. Professional installation is recommended for optimal performance.
Required Tools (Not Included):
- Adjustable wrench
- Phillips screwdriver
- Plumber's putty or silicone sealant
- Flashlight
- Safety glasses
Installation Steps:
- Turn Off Water Supply: Locate the main water supply valves for your sink (typically under the sink) and turn them off. Open the existing faucet to drain any remaining water.
- Remove Old Faucet (if applicable): Disconnect the water supply lines from the old faucet. Unscrew the mounting nuts and remove the old faucet and drain assembly from the sink. Clean the sink surface thoroughly.
- Install Faucet Body: Place the gasket (if provided) on the underside of the faucet base. Insert the faucet body through the single hole in the sink or countertop.
- Secure Faucet: From underneath the sink, slide the mounting washer and then the mounting nut onto the threaded shank of the faucet. Hand-tighten the mounting nut, then use an adjustable wrench to secure it firmly, ensuring the faucet is aligned correctly.
- Connect Water Supply Lines: Attach the hot and cold water supply lines to the corresponding inlets on the faucet body. Use an adjustable wrench to tighten connections, but do not overtighten.
- Install Drain Assembly: Apply plumber's putty or silicone sealant around the flange of the drain body. Insert the drain body into the sink drain hole. From underneath, attach the rubber washer, friction washer, and mounting nut to the drain body. Tighten securely. Connect the tailpiece to your P-trap.
- Test for Leaks: Slowly turn on the main water supply. Check all connections for leaks. Operate the faucet to ensure proper hot and cold water flow.
Image: Overhead view of the Kohler Honesty faucet installed in a bathroom sink. This image illustrates the faucet's appearance when mounted on a countertop.
Operating Instructions
The Kohler Honesty faucet features a single lever handle for intuitive control of water flow and temperature.
- Turning On/Off: Lift the lever handle upwards to turn on the water flow. Push the lever handle downwards to turn off the water flow.
- Adjusting Water Flow: The height to which the lever is lifted controls the volume of water flow. Lift higher for more flow, lower for less.
- Adjusting Water Temperature: Move the lever handle to the left for hot water and to the right for cold water. The position between left and right allows for mixing hot and cold water to achieve the desired temperature.
Image: Kohler Honesty faucet with water running. This image demonstrates the faucet in operation, showing water flowing from the spout.
Maintenance
Proper care and maintenance will ensure the longevity and appearance of your Kohler Honesty faucet.
Cleaning:
- Clean the faucet regularly with a soft, damp cloth.
- Avoid using abrasive cleaners, harsh chemicals, or scouring pads, as these can damage the finish.
- For stubborn spots, use a mild soap and water solution, then rinse thoroughly and dry with a soft cloth.
Ceramic Disc Valves:
Your faucet is equipped with KOHLER ceramic disc valves, designed for a lifetime of durable performance and to prevent leaks. These valves typically do not require lubrication or maintenance.
Image: Durable Ceramic Valves. This image shows a ceramic disc valve, highlighting the internal component responsible for the faucet's longevity and leak prevention.
Aerator Cleaning:
If water flow decreases, the aerator may be clogged with debris. Unscrew the aerator from the end of the spout, clean any mineral deposits or particles, and then reattach it.
Troubleshooting
This section addresses common issues you might encounter with your faucet.
| Problem | Possible Cause | Solution |
|---|---|---|
| Low water flow | Aerator clogged with debris or mineral deposits. Partially closed shut-off valves. | Remove and clean the aerator. Ensure both hot and cold water supply shut-off valves are fully open. |
| Leaks from spout | Worn ceramic disc valve. | Contact Kohler customer support for replacement parts or service. |
| Leaks from base of faucet | Loose mounting nut. Improperly seated gasket. | Tighten the mounting nut under the sink. If the leak persists, the gasket may need to be re-seated or replaced. |
| Water temperature not consistent | Imbalance in hot/cold water pressure. | Check water supply lines for kinks or obstructions. Ensure both hot and cold water supply valves are fully open. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Kohler |
| Model Name | Honesty |
| Model Number | 37889-4-BL |
| Color | Matte Black |
| Material | Metal |
| Mounting Type | Deck Mount (Single Hole Installation) |
| Number of Handles | 1 (Single Lever) |
| Handle Type | Lever |
| Flow Rate | 1.2 Gallons Per Minute (GPM) |
| Included Components | Handle, Clicker Drain with 1-1/4" metal tailpiece |
| Special Feature | Tarnish Resistant |
| Item Weight | 3.8 Pounds |
| UPC | 195711220110 |
Warranty Information
Kohler products are manufactured to the highest standards of quality and durability. This Kohler Honesty faucet comes with a lifetime limited warranty. This warranty covers defects in material and workmanship under normal residential use. For specific terms, conditions, and limitations of the warranty, please refer to the official Kohler warranty documentation provided with your purchase or visit the Kohler website.
Customer Support
If you have any questions regarding the installation, operation, maintenance, or warranty of your Kohler Honesty faucet, please contact Kohler customer service. Have your model number (K-37889-4-BL) and date of purchase ready when contacting support.
For the most up-to-date contact information and support resources, please visit the official Kohler website.
