1. Introduction
The Epson 664 EcoTank Ink Ultra-high Capacity Bottle Three Color CMY Combo Pack (T664520-S) is designed to provide thousands of vivid pages for your compatible Epson EcoTank printer. These genuine Epson ink bottles offer a cost-effective and convenient solution for everyday printing, reducing the need for frequent refills.
This manual will guide you through the proper handling, installation, and care of your ink bottles to ensure optimal performance and longevity of your printer.
2. Safety Information
Please read and adhere to the following safety precautions before handling the ink bottles:
- Keep out of reach of children. Do not drink the ink.
- Do not mix with other Epson® ink types or non-Epson inks. Use only genuine Epson 664 ink bottles with compatible EcoTank printers.
- Open ink bottle package only when ready to install. This helps prevent ink evaporation or contamination.
- Avoid sudden changes in temperature after opening, as this may cause swelling or shrinking of the ink bottle.
- In case of eye contact: Immediately rinse eyes thoroughly with clean water. If irritation persists, seek medical attention.
- In case of ingestion: Do not induce vomiting. Spit out immediately and rinse mouth thoroughly with water. Seek medical attention if discomfort occurs.
- In case of skin contact: Wash off with soap and water.
- For more detailed safety information, always refer to your specific printer's user manual.
3. Product Overview
The Epson 664 EcoTank Ink Combo Pack includes three ultra-high capacity ink bottles: Cyan, Magenta, and Yellow. These bottles are specifically designed for use with Epson EcoTank printers, featuring a unique keyed nozzle that ensures correct color insertion into the printer's ink tanks.

Figure 3.1: Epson 664 EcoTank Ink Combo Pack
This image displays the front of the Epson 664 EcoTank Ink Combo Pack, featuring the three individual ink bottles for Cyan, Magenta, and Yellow, along with the product branding and model number.
4. Setup and Ink Refill
Follow these steps to refill your Epson EcoTank printer's ink tanks using the 664 ink bottles. Always refer to your printer's specific manual for detailed instructions.
- Prepare Your Workspace: Place your printer on a flat, stable surface. It is recommended to place a sheet of paper or a cloth underneath the printer to catch any accidental spills.
- Open the Ink Tank Unit: Open the ink tank cover on your EcoTank printer. Locate the ink tank for the color you wish to refill (Cyan, Magenta, or Yellow).
- Open the Ink Tank Cap: Carefully open the cap of the specific ink tank you are refilling.
- Prepare the Ink Bottle: Remove the ink bottle from its packaging. Twist the cap off the ink bottle. Do not squeeze the bottle.
- Insert the Ink Bottle: Align the ink bottle's nozzle with the corresponding ink tank's filling port. The bottles are designed with unique keys to fit only the correct color tank, preventing accidental misfills. Gently push the bottle down to seat it securely.
- Refill the Tank: The ink will automatically flow into the tank. Do not squeeze the bottle. The flow will stop automatically when the tank is full.
- Remove and Cap: Once the ink tank is full, gently lift the ink bottle to remove it. Securely close the ink tank cap and the ink bottle cap.
- Repeat for Other Colors: Repeat the process for any other colors that need refilling.
- Close the Ink Tank Unit: Close the ink tank cover on your printer.

Figure 4.1: Ink Refill Diagram on Product Packaging
This image shows the side of the Epson 664 EcoTank Ink Combo Pack box, which includes visual instructions for refilling the ink tanks, emphasizing the keyed nozzle design and the no-squeeze refill process.
5. Operating Instructions
Once the ink tanks are refilled, your Epson EcoTank printer is ready for use. The ink functions as a standard consumable for your printer. Ensure your printer drivers are up-to-date for optimal performance.
- Printing: Use your printer's software or control panel to initiate print jobs as usual.
- Ink Levels: Monitor ink levels through your printer's display or the Epson printer utility software on your computer. Refill tanks before they run completely empty to avoid air entering the ink lines.
- Color Accuracy: For best color accuracy, use genuine Epson paper and ensure your printer settings are configured correctly for the type of document or photo you are printing.
6. Maintenance and Storage
Proper maintenance and storage of your ink bottles and printer can extend their lifespan and ensure consistent print quality.
- Storage of Unopened Bottles: Store unopened ink bottles in a cool, dark place, away from direct sunlight and extreme temperatures.
- Storage of Opened Bottles: If you have leftover ink in a bottle after refilling, securely cap the bottle and store it upright in a cool, dark place. Use the remaining ink as soon as possible.
- Preventing Clogs: Print regularly to prevent ink from drying in the print head nozzles. If print quality degrades, perform a nozzle check and head cleaning using your printer's utility software.
- Printer Environment: Keep your printer in a clean, dust-free environment to prevent foreign particles from entering the ink tanks or print head.
7. Troubleshooting
If you encounter issues related to ink, consider the following troubleshooting steps:
- Poor Print Quality (Streaks, Fading):
- Check ink levels and refill if necessary.
- Perform a nozzle check to identify clogged nozzles.
- Run a print head cleaning cycle through your printer's utility software. You may need to run this several times.
- Ensure you are using genuine Epson ink.
- Printer Not Recognizing Ink:
- Ensure the ink tank caps are securely closed after refilling.
- Verify that the ink bottles were inserted into the correct color tanks.
- Restart your printer and computer.
- Ink Spillage:
- Immediately wipe up any spilled ink with a damp cloth. Ink can stain.
- If ink gets on skin, wash thoroughly with soap and water.
For more complex issues, consult your Epson printer's user manual or visit the Epson support website.
8. Specifications
| Product Name | Epson 664 EcoTank Ink Ultra-high Capacity Bottle Three Color CMY Combo Pack |
| Model Number | T664520-S |
| Ink Colors | Cyan, Magenta, Yellow |
| Page Yield | Approximately 150 pages (based on ISO/IEC 24712 pattern with Epson’s methodology) |
| Compatible Printer Models | EcoTank ET-2500, ET-2550, ET-2600, ET-2650, ET-4500, ET-4550, ET-3600, ET-16500 |
| Product Dimensions | 4.1 x 2.8 x 7.6 inches (packaging) |
| Item Weight | 11.2 ounces |
| Manufacturer | Epson |
| Country of Origin | Indonesia |
9. Warranty and Support
Epson genuine ink bottles are manufactured to high-quality standards. For information regarding product warranty or technical support, please refer to the documentation included with your Epson EcoTank printer or visit the official Epson support website.
Epson Support Website: www.epson.com/support
When contacting support, please have your printer model number and the ink bottle model number (T664520-S) available.







