What Ink Does the Epson WorkForce WF-3730 Use?
Last Updated:Last updated: September 27, 2026. Reviewed by William Elward, founder of Castle Ink.
Correction: an earlier version of this article said the WF-3730 uses Epson 220 cartridges. It uses Epson 702/702XL.
Quick answer: what ink does the Epson WorkForce Pro WF-3730 use?
The Epson WorkForce Pro WF-3730 uses 4 Epson 702 DURABrite Ultra cartridges: black, cyan, magenta, and yellow. High-capacity 702XL cartridges fit the same slots. 702XL is rated for about 1,100 black and 950 color pages, roughly three times the standard size, so it's the better value for regular office printing. The pigment ink dries fast and resists smudging, which suits documents.
Cartridge options at a glance
| Cartridge | Part numbers | Approx. yield* |
|---|---|---|
| Epson 702 black | T702120 | ~350 pages |
| Epson 702 color (C/M/Y) | T702220 / T702320 / T702420 | ~300 pages each |
| Epson 702XL black | T702XL120 | ~1,100 pages |
| Epson 702XL color (C/M/Y) | T702XL220 / T702XL320 / T702XL420 | ~950 pages each |
*Approximate ISO yields from published cartridge specifications. Real-world results depend on coverage, photo printing, and cleaning cycles.
Common questions about Epson WorkForce Pro WF-3730 ink
Should I buy 702 or 702XL for the WF-3730?
702XL for most people. 702XL is rated for about 1,100 black and 950 color pages, roughly three times the standard size, so it's the better value for regular office printing. See Is XL ink actually worth it? Standard vs. XL with real numbers.
Can I mix standard and high-yield cartridges?
Yes. Each cartridge is read separately, so any mix of 702 and 702XL works.
What other printers use Epson 702 ink?
702/702XL also fits the WorkForce Pro WF-3720, and WF-3733. If you own more than one, a single stock of cartridges covers them all.
Will other Epson cartridges fit the WF-3730?
No. Epson 252 (WF-3640, WF-7710, WF-7720) and Epson 220 are different cartridges, even though the printer names are close. Always match the number on your current cartridge.
Are compatible 702XL cartridges safe for the WF-3730?
Yes. Quality compatible and remanufactured cartridges print like OEM, and using them doesn't void your warranty under U.S. law. Epson firmware updates have been known to reject some third-party chips, so consider turning off automatic firmware updates. More: Compatible vs. remanufactured vs. OEM ink and Does compatible ink void your printer warranty?.
How do I replace the ink in the WF-3730?
Turn the printer on and lift the scanner unit. When the carriage stops, squeeze the tab on the empty cartridge and lift it out. Shake the new cartridge gently, remove only the yellow tape, and press it into its slot until it clicks. Close the scanner unit and let the printer charge the ink. Step-by-step: How to install an ink cartridge in an Epson printer.
Why won't the WF-3730 recognize a cartridge?
Reseat it firmly until it clicks, make sure the yellow tape is fully removed, and wipe the chip with a dry lint-free cloth. Turn the printer off for a minute. If a compatible cartridge stops working right after a firmware update, contact the seller for a replacement. More fixes: Printer says ink cartridge not recognized: how to fix it.
Why are prints from my WF-3730 faded, streaky, or blurry?
Run a nozzle check from the Maintenance menu first. Gaps mean a clog: run a head cleaning (up to two or three cycles). If the check is complete but lines look jagged or doubled, align the print head instead; see our print head alignment guide. More fixes: Why is my printer printing streaks?.
Why did the first set of cartridges run out so fast?
New printers use part of the first set to fill the ink system. It's a one-time cost. See why the first cartridges run out fast.
Does the WF-3730 print double-sided and fax?
Yes. It's an office all-in-one with automatic 2-sided printing, an automatic document feeder, and fax.
Is the WF-3730 the same as the WF-3720?
They're closely related WorkForce Pro models and use the same 702 cartridges. See the WF-3720 ink guide.
WF-3730 key facts
- Type: office all-in-one (print, scan, copy, fax)
- Ink: 4 individual Epson 702/702XL pigment cartridges
- Duplex: automatic
- Same ink as: WF-3720, WF-3733
Shop WF-3730 ink at Castle Ink
Castle Ink compatibles typically cost 50–70% less than Epson retail and are backed by our compatibility guarantee. Estimate your savings with the Printer ink cost calculator.
Official Epson resources
Find drivers, manuals and firmware by searching “WF-3730” at epson.com/support.
Related guides
- How to install an ink cartridge in an Epson printer
- Epson printer not printing color: the real fix
- Printer says ink cartridge not recognized: how to fix it
- Is XL ink actually worth it? Standard vs. XL with real numbers
- Compatible vs. remanufactured vs. OEM ink
- Print head alignment guide
Buy genuine Epson 702XL on Amazon: Epson 702XL on Amazon
About the author: William Elward is the founder of Castle Ink and has written about printers, ink cartridges, and printing technology for more than 20 years.
Need replacement Epson ink cartridges? Shop Epson ink cartridges at Castle Ink. Remanufactured, up to 70% less than OEM, and shipped the same day when you order by 4 PM ET.
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