Does Epson EcoTank ET-4850 work with Epson 502 Ink Bottles?

What works & limitations

• Epson 502 Black, Cyan, Magenta, and Yellow bottles each have a unique key-coded nozzle matching the corresponding EcoTank reservoir — prevents wrong-color fills
• A full set of Epson 502 bottles fills all four tanks: Black provides approximately 7,500 pages, each color provides approximately 6,000 pages at 5 percent coverage
• No chip to authenticate — EcoTank ink level is measured by physical float sensors in the transparent tanks, not by cartridge chip communication
• Ink bottle refill takes approximately 2 minutes per color using the key-coded pour nozzle — minimal mess risk
• Epson 502 bottles are available individually or in multi-packs — Black bottles are consumed more quickly and can be purchased separately for black-heavy environments
• Epson's ink formulation in 502 series is optimized for the ET-4850's printhead — maintains printhead health and clog resistance with regular use
• ET-4850 ships with a full set of 502 ink bottles in the box — initial fill represents approximately $60 to $80 of equivalent cartridge value included at no extra cost
• Non-Epson ink bottles will not have the key-coded nozzle and require forceful pouring that risks spills — Epson advises against third-party ink as it may void the 2-year warranty and cause printhead clogging
• Epson 502 bottles for ET-2760, ET-3760, and ET-4760 models use the same 502 series name in some markets but verify the bottle package lists ET-4850 specifically before purchasing
• Epson 502 ink bottles cost approximately $13 to $16 each at retail; a complete set of 4 costs approximately $52 to $60 and provides the capacity of roughly 30 traditional cartridge replacements — per-page cost for EcoTank is approximately $0.004 per black page
• Epson uses a printhead cleaner cycle on startup and after long idle periods — this consumes a small amount of ink; frequent short print jobs with long idle gaps increase cleaning cycle frequency and reduce effective yield per bottle
• Epson EcoTank ink does not expire in the sealed bottle for approximately 2 years; once poured into the tank, Epson recommends using the contents within 6 months for optimal print quality
• The ET-4850 is an all-in-one with print, scan, copy, and fax — the same 502 ink bottles serve all print functions including photo printing via the ET-4850's dedicated photo tray