1. Introduction
Thank you for choosing the IMEX GLT023/NG ETNA Built-in Basin Mixer Tap. This single-lever faucet features a two-part independent body and a sleek matte black finish, designed for concealed installation in your bathroom basin. This manual provides essential information for the safe and correct installation, operation, and maintenance of your new tap.
Please read this manual thoroughly before installation and keep it for future reference. Professional installation is recommended to ensure proper function and compliance with local plumbing codes.

Image of the IMEX GLT023/NG ETNA Built-in Basin Mixer Tap, showing the matte black spout and single-lever control unit.
2. Safety Information
- Always turn off the main water supply before beginning any installation or maintenance work.
- Ensure all connections are secure and watertight to prevent leaks.
- Use appropriate tools and wear protective gear during installation.
- If you are unsure about any part of the installation process, consult a qualified plumber.
- Do not use abrasive cleaners or harsh chemicals on the matte black finish, as this may damage the surface.
3. Package Contents
Verify that all components are present and undamaged before installation:
- Built-in spout (matte black brass)
- Single-lever mixer control unit (matte black brass)
- Concealed body for spout and mixer
- Mounting hardware and seals

Image of the IMEX GLT023/NG ETNA Built-in Basin Mixer Tap installed above a white basin, demonstrating its aesthetic integration into a modern bathroom.
4. Setup and Installation
This tap is designed for built-in (concealed) installation. Accurate measurements and proper wall preparation are crucial.
4.1 Pre-installation Steps
- Turn off the main water supply to the installation area.
- Clear the installation area and ensure you have all necessary tools.
- Review the technical diagram for precise measurements and required wall cavity dimensions.
4.2 Mounting the Concealed Body
- Create openings in the wall for the concealed body of both the spout and the mixer unit according to the technical diagram. Ensure correct spacing and depth.
- Securely mount the concealed body units within the wall, ensuring they are level and flush with the finished wall surface.
- Connect the hot and cold water supply lines to the designated inlets on the mixer's concealed body. Ensure all connections are sealed properly.
- Connect the mixed water outlet from the mixer's concealed body to the inlet of the spout's concealed body.
4.3 Installing Visible Components
- Once the wall is finished, attach the decorative plates and the spout to its concealed body. Secure firmly. The spout length is approximately 219 mm.
- Install the single-lever handle onto the mixer's concealed body. The mixer plate has a diameter of approximately 80 mm, and the handle extends about 110 mm.
- Carefully turn on the main water supply and check for any leaks.
- Test the tap's operation (hot, cold, and mixed water flow).

Technical diagram illustrating the dimensions and installation requirements for the IMEX GLT023/NG ETNA Built-in Basin Mixer Tap. Includes measurements for the spout length, mixer unit, and concealed body components.
5. Operating Instructions
The IMEX GLT023/NG ETNA tap features a single-lever control for both water flow and temperature.
- To turn on/off the water: Lift the lever upwards to increase flow and push it downwards to turn off the water.
- To adjust water temperature: Move the lever left for hotter water and right for colder water.
6. Maintenance
Regular cleaning will help maintain the appearance and functionality of your tap.
- Clean the matte black finish with a soft, damp cloth and mild soap.
- Rinse thoroughly with clean water and dry with a soft cloth to prevent water spots.
- Do not use abrasive sponges, scouring pads, or chemical cleaners containing alcohol, ammonia, or bleach, as these can damage the finish.
- Periodically check connections for any signs of leaks and tighten if necessary.
7. Troubleshooting
Refer to the table below for common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Low water flow | Clogged aerator or supply lines | Clean or replace the aerator. Check for kinks or blockages in supply lines. |
| Water leaks from spout or handle | Loose connections or worn seals | Tighten connections. Inspect and replace seals or O-rings if damaged. |
| Difficulty adjusting temperature | Cartridge issue | Consult a qualified plumber to inspect or replace the mixer cartridge. |
| No water flow | Main water supply off or severe blockage | Check if the main water supply is on. Inspect supply lines for complete blockage. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | GLT023/NG |
| Brand | Imex |
| Type | Built-in Basin Mixer Tap |
| Material | Brass / Steel |
| Color | Matte Black |
| Installation Type | Concealed / Wall-mounted |
| Number of Handles | Single-lever |
| Package Dimensions | 30 x 18 x 7 cm |
| Item Weight | 500 grams |
9. Warranty Information
Information regarding the availability of spare parts is not provided. For specific warranty details, please refer to the purchase documentation or contact your retailer.
10. Customer Support
For further assistance or inquiries regarding your IMEX GLT023/NG ETNA Built-in Basin Mixer Tap, please contact your retailer or the manufacturer, IMEX.