Epson Stylus NX420 Ink Cartridges
Shop ink cartridges for your Epson Stylus NX420, which uses the Epson 133 ink cartridges series. Ink Depot has been supplying reliable consumables for this printer since Oct 2010. As an all-in-one inkjet designed for general home printing, it accepts standard 133 and high-yield 138 cartridges across separate black, cyan, magenta, and yellow slots. Replacing standard 133 black cartridges with high-capacity 138 (C13T138192) options helps lower ongoing costs during regular document printing. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected Output and Cartridge Yield
Page yields for Epson 133 and 138 cartridges are measured under ISO/IEC 24711 testing standards for inkjet systems. High-yield 138 cartridges contain extra ink volume to extend replacement intervals during frequent text printing, while individual colour cartridges ensure you replace only the depleted colour.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 133 | Standard | Black | 230 | $0.034 |
| 133 | Standard | Cyan | 305 | $0.022 |
| 133 | Standard | Magenta | 305 | $0.022 |
| 133 | Standard | Yellow | 305 | $0.022 |
| 138 | High Yield | Black | 380 | $0.035 |
| 138 | High Yield | Cyan | 420 | $0.032 |
| 138 | High Yield | Magenta | 420 | $0.032 |
| 138 | High Yield | Yellow | 420 | $0.032 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Compatible cartridges.
Using Compatible Cartridges
Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Choosing compatible Epson 133 and 138 cartridges allows everyday home users to reduce print spend while maintaining reliable document clarity. You can learn more about how alternative cartridges compare by reading our guide on genuine vs compatible cartridges.
Replacements and Shipping Options
If you print mostly text documents, choosing high-yield 138 black cartridges provides superior page output. If you produce occasional colour graphics or photo prints, multi-packs offer balanced supply management. Our compatible cartridges are backed by a money-back guarantee, allowing you to shop with confidence. Review our full returns policy for complete coverage details. Free delivery applies on all orders over $99, with fast dispatch from our nationwide warehouses in Perth, Brisbane, Sydney, Melbourne, and Adelaide. Browse our full selection of Epson ink cartridges today.
Handy Consumable Tip
Pro Tip: Upgrading from standard 133 cartridges to high-capacity 138 cartridges gives you significantly more ink per cartridge without changing physical dimensions, delivering better long-term cost per page for high-frequency printing.
Frequently Asked Questions
Can I use high-yield 138 cartridges alongside standard 133 cartridges in the NX420?
Yes, Epson 133 standard yield and 138 high yield cartridges are completely interchangeable in the Stylus NX420. You can mix different yield levels across the individual colour slots depending on your printing requirements.
How do 138 high-yield cartridges fit in the printer if they contain more ink?
The external plastic shell of a 138 high-yield cartridge has identical dimensions to a standard 133 cartridge. The additional yield is achieved through a larger internal ink reservoir, allowing it to click into the standard ink carriage seamlessly.
Do I need to replace all colour cartridges at the same time?
No, the Stylus NX420 uses individual ink cartridges for black, cyan, magenta, and yellow. You only need to replace the specific colour cartridge that has run out of ink, which helps minimise unnecessary ink waste.
