The printer ink maintenance tank is user replaceable. The printer will alert you when getting low or when tank needs to be changed. The maintenance box in your Epson device stores the ink that gets flushed from it during the cleaning of printheads. It's of paramount importance to replace it if it is no longer functioning correctly. The Genuine Epson T6716 Maintenance Box (C13T671600) will slot into your printer in place of an ailing box and soak up wasted ink so it can perform at its optimum level once again. The Genuine Epson T6716 Maintenance Box (C13T671600) has a mass of compressed absorbent fibre to store excess ink in the most efficient manner. If you're encountering issues with printer performance or are experiencing error alerts, it might be time to replace your existing box with a new one.