WorkForce ET
WorkForce ET is Epson's business-grade EcoTank line — supertank all-in-ones built for small offices that print invoices, reports and color documents every day. The WorkForce ET models listed here all refill with Epson 502 ink bottles: 127 mL pigment black (up to 7,500 pages) and 70 mL dye colors (up to 6,000 pages each, ISO/IEC 24712). Clever Supplies compatible 502 bottles match the keyed EcoFit fit and are covered by a lifetime warranty.
| Bottle | Type | Color | Approx. Yield |
|---|---|---|---|
| Epson T502120 (compatible) | Pigment ink bottle, 127 mL | Black | 7,500 pages |
| Epson T502220 (compatible) | Dye ink bottle, 70 mL | Cyan | 6,000 pages |
| Epson T502320 (compatible) | Dye ink bottle, 70 mL | Magenta | 6,000 pages |
| Epson T502420 (compatible) | Dye ink bottle, 70 mL | Yellow | 6,000 pages |
| Epson 502 Set of 4 (compatible) | Full bottle set | Black / Cyan / Magenta / Yellow | 7,500 black, 6,000 per color |
WorkForce ET Ink — 502 Bottles for Business EcoTank Models This section covers the WorkForce ET-3750 and ET-4750, the business EcoTank models ET-2850, ET-3850 and ET-4850, and the wide-capable ET-15000. A naming note that saves returns: the ET-3750 and ET-4750 are WorkForce models. They are sometimes listed elsewhere under "Expression" — that is a different shelf for different machines; if your printer says WorkForce ET-3750 or ET-4750 on the front, you are in the right place and your ink is 502.
Business printing leans on black, and the 502 family is built that way: the black bottle is the big one (127 mL, pigment ink for crisp, water-resistant text, up to 7,500 pages), while cyan, magenta and yellow are 70 mL dye bottles at up to 6,000 pages each. Several WorkForce models even shipped with two full ink sets in the box — these are high-volume machines, and bottle refills are where their running-cost advantage comes from.
Keep the families straight: 502 ≠ 522. The 522 bottles (65 mL each, black only 4,500 pages) belong to ET-2720, ET-2800 and ET-4800 — none of which appear in this section. Every model on this page is verified against Epson's own documentation as a 502 printer.
The WorkForce ET shelf also includes the 664-ink generation: the ET-4500 (664 in all four positions — black up to 4,000 pages, colours up to 6,500 pages each) and the ET-4550 and ET-16500, whose colours are 664 bottles while the black is the larger 774 pigment bottle (140 mL, up to 6,000 pages). Each model page lists its exact bottles; check yours before ordering.