Epson ET-4810 Series User Manual page 190

Solving Problems
9. When you have finished filling the ink, remove the ink bottle.
Important:
c
Do not leave the ink bottle inserted; otherwise the bottle may be damaged or ink may leak.
Note:
If any ink remains in the ink bottle, tighten the cap and store the bottle upright for later use.
10. Close the ink tank cap securely.
11. Close the ink tank cover firmly.
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It is Time to Refill the Ink
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Refilling the Ink Tanks
190