Epson EcoTank Workforce ET-4550 Ink Bottles
Your Epson EcoTank Workforce ET-4550 uses the T664 ink bottles alongside the high-capacity T774 black ink. We have been supplying replacement consumables for this four-colour printer since Nov 2016. Small businesses rely on this refillable cartridge system for continuous print runs, where the black ink routinely depletes faster than the colours. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected page output and replacement cycles
Epson determines these high-capacity page yields using the ISO/IEC 24712 international standard for continuous colour printing. Real-world business use shows excellent cost-per-page efficiency, making this cartridge system perfect for handling high-volume daily documentation without frequent ordering.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| C13T664292 | Standard | Cyan | 6,500 | $0.003 |
| C13T664392 | Standard | Magenta | 6,500 | $0.003 |
| C13T664492 | Standard | Yellow | 6,500 | $0.003 |
| C13T774192 | High Yield | Black | 6,000 | $0.004 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Choosing between genuine and compatible options
Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Choosing compatible ink bottles lets you significantly reduce day-to-day printing costs while maintaining clear text and graphics. For a comprehensive breakdown of how these alternatives compare to original products, read our genuine vs compatible cartridges comparison guide.
Best way to stock these cartridges
If your office prints mainly text documents and invoices, the black T774 bottle will empty much quicker than the C13T664292 cyan, C13T664392 magenta, and C13T664492 yellow inks. Bundles offer the best value for keeping your supplies topped up. All our compatible ink bottles come backed by a money-back guarantee, allowing you to buy with complete peace of mind. Check our returns policy for full details.
Free delivery applies on all orders over $99 (conditions apply). To ensure prompt arrival, we dispatch your Epson ink bottles directly from our regional warehouses located across Perth, Brisbane, Sydney, Melbourne, and Adelaide.
Pro Tip
When refilling the tanks, never squeeze the ink bottles too aggressively. Let gravity fill the reservoir naturally to prevent air bubbles from entering the internal ink lines, which can lead to temporary print dropouts.
Frequently Asked Questions
Can I mix genuine Epson ink bottles with compatible bottles in the same printer?
Yes, you can safely use a compatible black ink bottle alongside genuine colour bottles, or vice versa. The printer reservoirs operate independently, meaning the ink types do not mix until they reach the printhead lines.
Why does my black tank use a different series number compared to the colours?
The EcoTank system uses a high-capacity T774 pigment black ink designed specifically for sharp business text documents, while the T664 colour tanks use dye-based inks to produce smoother graphics and charts.
How do I know when to refill the ink tanks before they empty completely?
You must visually monitor the physical ink levels through the clear windows on the front of the printer. Do not rely solely on software notifications, as running the system completely dry can pull air into the ink tubes and require a lengthy priming cycle.
