Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your KOHLER 1103459-BC 1.5 GPM Medium Aerator Kit. This genuine KOHLER part is designed to ensure optimal performance and longevity for your faucet. Please read these instructions carefully before proceeding with installation or use.
Safety Information
Always turn off the water supply to the faucet before attempting any installation or maintenance. Use appropriate tools and wear safety glasses to prevent injury. If you are unsure about any step, consult a qualified plumber.
Package Contents
Verify that all components are present before beginning installation:
- 1.5 GPM Medium Aerator
- Aerator Washer/Gasket

Image: The KOHLER 1.5 GPM Medium Aerator Kit, showing the aerator and its accompanying washer.
Installation Instructions
- Turn off Water Supply: Locate the water supply valves under the sink and turn them off completely.
- Remove Existing Aerator: Unscrew the old aerator from the faucet spout. This may require an aerator wrench or pliers, depending on the faucet model. Wrap the pliers with a cloth to prevent scratching the faucet finish.
- Clean Faucet Spout: Clean any debris or mineral buildup from the inside threads of the faucet spout.
- Insert New Washer: Place the new washer/gasket into the KOHLER aerator. Ensure it is seated correctly.
- Install New Aerator: Screw the new KOHLER 1.5 GPM Medium Aerator into the faucet spout by hand until snug. Do not overtighten.
- Turn on Water Supply: Slowly turn the water supply valves back on.
- Check for Leaks: Turn on the faucet and check for any leaks around the aerator connection. If leaks occur, gently tighten the aerator a bit more.
Operation
The KOHLER 1.5 GPM Medium Aerator is designed to provide a consistent water flow rate of 1.5 gallons per minute (GPM) while mixing air into the water stream. This creates a smooth, splash-free flow and helps conserve water. No specific operational steps are required beyond normal faucet use.
Maintenance
To maintain optimal performance and prevent mineral buildup, periodically clean your aerator:
- Regular Cleaning: Unscrew the aerator from the faucet spout.
- Rinse Debris: Rinse the aerator screen under running water to remove any loose debris.
- Mineral Buildup: If mineral buildup is present, soak the aerator in a solution of equal parts white vinegar and water for 15-30 minutes. Use a soft brush (like an old toothbrush) to gently scrub away any remaining deposits.
- Reinstall: Rinse the aerator thoroughly with clean water and reinstall it following the installation steps.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Low water flow | Clogged aerator screen due to debris or mineral buildup. | Remove and clean the aerator as described in the Maintenance section. |
| Water leaks around aerator | Aerator not tightened sufficiently or washer is improperly seated/damaged. | Ensure the washer is correctly seated. Gently tighten the aerator. If leaking persists, replace the washer. |
| Erratic or splashing water stream | Partial clog in the aerator or damaged aerator components. | Clean the aerator thoroughly. If the problem continues, the aerator may need replacement. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | 1103459-BC |
| Brand | Kohler |
| Material | Metal |
| Finish Type | Bright Chrome |
| Thread Size | M24x1 |
| Maximum Flow Rate | 1.5 Gallons Per Minute (GPM) |
| Item Weight | 0.32 ounces |
| Product Dimensions | 0.8 x 0.75 x 0.75 inches |
| Included Components | Aerator Kit, 1.5 Gpm, Medium |
Warranty and Support
As a genuine KOHLER part, this aerator is designed to meet KOHLER's high standards for quality and performance. Using genuine parts helps maintain the original product warranty and ensures compatibility. For specific warranty details or technical support, please refer to the official KOHLER website or contact KOHLER customer service directly. Always look for the KOHLER GENUINE PARTS logo to ensure authenticity.

Image: An assortment of KOHLER genuine service parts, emphasizing the importance of using authentic components for repairs and maintenance.

Image: Icons illustrating key features of KOHLER genuine parts, including certification, quality materials, optimal performance, and warranty protection.

Image: A visual comparison highlighting the differences between KOHLER genuine parts and non-OEM alternatives, emphasizing design and material quality.

Image: A detailed table outlining the advantages of KOHLER genuine parts over non-OEM parts, covering aspects like engineering, materials, testing, and warranty.