You can check the total number of pages fed through the printer. The information is printed together with the nozzle check pattern.
Select Maintenance on the printer's control panel.
To select an item, use the buttons, and then press the OK button.
Select Nozzle Check.
Follow the on-screen instructions to load paper and print the nozzle check pattern.
You can also check the total number of pages fed from the printer driver.
Click Printer and Option Information on the Maintenance tab.
Apple menu > System Preferences > Printers & Scanners (or Print & Scan, Print & Fax) > Epson(XXXX) > Options & Supplies > Utility > Open Printer Utility > Printer and Option Information