1. Introduction
This manual provides essential information for the proper use and maintenance of your original DeLonghi Nespresso Citiz series replacement water tank. This water tank is designed to be compatible with specific DeLonghi Nespresso Citiz coffee machine models.
Compatible Models:
- EN165.B (Versions: AT, DE, ES, IT, CZ, PL, HU, AU)
- EN165.CW (Versions: AT, DE, ES, IT, CZ, PL, HU, AU)
- EN265.BAE (Versions: AT, DE, ES, IT, AU, NZ, CZ, PL, HU)
- EN166
- EN167
- EN266
Please verify your coffee machine's model number against this list to ensure compatibility before installation.
2. Product Overview
The DeLonghi Nespresso Citiz water tank (Model ES0098799) is a genuine replacement part designed for seamless integration with your compatible coffee machine. It is a clear, removable component that holds the water supply for brewing.

Image Description: A clear plastic water tank, cylindrical in shape with a flat base, designed for DeLonghi Nespresso Citiz coffee machines. It features a small red and silver valve mechanism at the bottom, which connects to the coffee machine's water intake.
Key Feature:
- Removable Tank: Facilitates easy refilling and cleaning.
3. Setup and Installation
- Unpack: Carefully remove the new water tank from its packaging. Inspect for any damage.
- Prepare Coffee Machine: Ensure your Nespresso Citiz coffee machine is turned off and unplugged from the power outlet before proceeding.
- Remove Old Tank (if applicable): If replacing an existing tank, gently pull the old tank upwards and away from the machine.
- Position New Tank: Align the new water tank with the designated slot at the back of your Nespresso Citiz machine.
- Secure Tank: Gently push the tank downwards until it sits firmly and securely in place. You should feel it click or settle into position. Ensure there are no gaps or wobbling.
- Fill Tank: Fill the water tank with fresh, clean drinking water up to the MAX fill line. Avoid overfilling.
- Power On: Plug the coffee machine back into the power outlet and turn it on.
4. Operating the Water Tank
The water tank functions as the reservoir for your coffee machine's water supply. Proper operation involves regular refilling and ensuring it is correctly seated.
- Refilling: When the water level is low, carefully lift the water tank from the machine. Fill it with fresh, cold drinking water. Do not use sparkling water or other liquids.
- Re-inserting: Place the filled water tank back into its position on the coffee machine, ensuring it is securely seated to prevent leaks and ensure proper water flow.
- Water Quality: For optimal coffee taste and machine longevity, use filtered water if your tap water is hard.
5. Maintenance and Cleaning
Regular cleaning of the water tank is crucial for hygiene and to prevent mineral buildup, which can affect coffee taste and machine performance.
- Daily Cleaning: After each use, or at least daily, empty any remaining water from the tank. Rinse the tank thoroughly with fresh water.
- Weekly Cleaning: Once a week, wash the water tank with mild dish soap and warm water. Use a soft brush or sponge to clean the interior.
- Rinsing: Rinse the tank thoroughly multiple times to ensure all soap residue is removed. Any remaining soap can affect the taste of your coffee.
- Drying: Allow the tank to air dry completely before re-inserting it into the machine, or wipe it dry with a clean, lint-free cloth.
- Descaling: The water tank itself does not require descaling, but ensure you follow your Nespresso Citiz machine's descaling instructions regularly to maintain the internal water system.
6. Troubleshooting
If you encounter issues related to the water tank, consider the following:
- Water Leakage:
- Ensure the water tank is correctly and firmly seated in its position on the coffee machine.
- Check for any visible cracks or damage to the tank. If damaged, replacement is necessary.
- Verify that the rubber seal at the bottom of the tank (around the valve) is intact and clean.
- No Water Flow:
- Confirm the water tank is filled with sufficient water.
- Ensure the tank is properly seated, allowing the valve to open and connect with the machine's water intake.
- Check if the valve mechanism at the bottom of the tank is free from obstructions or debris.
- Unusual Taste in Coffee:
- Thoroughly clean the water tank as per the maintenance instructions to remove any residue.
- Use fresh, filtered water.
For issues not resolved by these steps, refer to your Nespresso Citiz coffee machine's main instruction manual or contact DeLonghi customer support.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | De'Longhi |
| Item Model Number | ES0098799 |
| Product Dimensions (L x W x H) | 20 x 8 x 8 cm |
| Item Weight | 200 g |
| Special Feature | Removable Tank |
| Exterior Finish | Clear Plastic |
| Included Components | Water Tank |
| Compatible Coffee Maker Type | Nespresso Citiz Espresso Machine |
| Spare Part References | ES0084450, ES0055340 |
| Spare Parts Availability | Information unavailable |
8. Warranty and Support
Specific warranty information for this replacement water tank is not provided in the product data. For details regarding warranty coverage, claims, or technical support, please refer to the documentation that came with your original DeLonghi Nespresso Citiz coffee machine or contact De'Longhi customer service directly.
You can typically find contact information on the official De'Longhi website or within your coffee machine's main user manual.