Epson EcoTank Expression ET-3600 Ink Bottles
Your Epson EcoTank Expression ET-3600 uses the T664 ink bottle series alongside the T774 black ink bottle. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance. We have been supplying replacement ink bottles for this four-colour EcoTank printer since Mar 2017. Because this continuous ink system relies on high-capacity reservoirs rather than traditional cartridges, users rarely face frequent replenishment cycles, changing their buying patterns toward convenient multi-bottle bundle packs.
Page output expectations
Epson determines the page yield metrics for these T664 and T774 ink bottles based on the international ISO/IEC 24711 standard for inkjet printing. Home office setups will find that the black and colour reservoirs deplete at highly staggered intervals depending on text versus document graphics ratios.
| 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. Opting for compatible T664 or T774 refill bottles provides a highly economical alternative for everyday printing. You can read a detailed comparison between these options on our genuine vs compatible cartridges blog post.
Stocking your ink bottles and delivery
If your daily printing consists mostly of monochromatic documents, you will cycle through the T774 black bottle far more quickly than the colour ink bottles. For mixed documents and web page printing, ordering a full bundle pack prevents sudden colour depletion. All our compatible ink options are backed by a complete money-back guarantee for total reassurance. Please view our returns policy for details. Free delivery applies on all orders over $99 (conditions apply), shipped directly from our close regional distribution centres located in Perth, Brisbane, Sydney, Melbourne and Adelaide to ensure prompt arrival. You can browse our complete collection of Epson ink bottles online.
Pro Tip
Never wait until the ink levels completely disappear below the lowest line on the EcoTank window to refill your printer; running the internal ink lines completely dry can introduce air pockets into the printhead assembly, which disrupts the thermal firing nozzles and requires multiple deep printhead cleaning cycles to rectify.
Frequently Asked Questions
Can I mix a compatible T664 ink bottle with genuine Epson inks already in the printer?
Yes, you can safely fill individual ink reservoirs with compatible T664 or T774 bottles even if the other chambers still contain original factory ink, as they are formulated to be fully chemically compatible within the same fluid system.
Why does my ET-3600 printer require a different series code for black ink compared to the colours?
The ET-3600 relies on a specialised high-capacity T774 pigment black ink bottle designed specifically for crisp, fade-resistant document text, whereas the accompanying T664 cyan, magenta, and yellow reservoirs utilise specialised dye-based formulas tailored for smooth colour blending.
Do these refill bottles feature a spill-proof mechanism or key physical notches?
Unlike later EcoTank models with keyed bottle caps, this generation of T664 and T774 bottles uses a generic foil tip and nozzle system, meaning you must carefully align the bottle over the open port manually and monitor the physical tank level visually as you squeeze to prevent overfilling.
