The printer ink maintenance tank is user replaceable. The printer will alert you when getting low or when tank needs to be changed.
Model: C12C890191
Compatible with: Epson Replacement Ink Maintenance Tank for Stylus Pro 4880, 7900, 11880, 4000, 4800, 7600, 7800, 7880, 9600, 9800, 9880, 9900, WT7900, and SureLab D3000