Is Epson ink interchangeable?

[Rowan]

I have bought an Epson ET 2720. Can I use Epson 664 ink in this as I have unopened bottles? Ink 552 is recommended. Normal paper printing only, never photographic.Thank you

 

[Ink stained Fingers]

Yes, you could, you can unscrew the tops of the bottles with some force and refill the inks into the other bottles.