How do I refill the ink tanks on the Epson ET-2800?
The manual includes a dedicated section on refilling ink tanks starting with ink safety precautions. You should follow the Ink Safety Precautions before refilling and use the Refilling the Ink Tanks procedure. Genuine Epson ink bottles can be purchased at epson.com or by calling 800-GO-EPSON (800-463-7766) in the U.S. (Pages 144-157)
From the official Epson Epson ET 2800 Ecotank Wireless Color Printer User manual, page 151
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