Epson EcoTank Pro ET-5150 Wireless All-in-One Supertank Printer - Manual (Page 268)

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10. Wait for the ink to fill the tank. Do not squeeze the bottle or allow it to contact any surface. Ink flows
into the tank and stops automatically when the ink is filled to the upper line.
Note: If ink does not flow from the bottle, lift and reinsert the bottle.
11. When the ink tank is full, remove the ink bottle and securely close it with the cap.
Note: If any ink remains in the bottle, store the bottle upright for later use. Do not leave the ink bottle
inserted; otherwise the bottle may be damaged or ink may leak.
12. Close the ink tank cap.
13. Repeat the steps above to refill other ink tanks, as necessary.
14. Close the ink tank cover until it clicks.