converting from Jet ink to Sublimation dye

I have a friend that has a Epson 1400 with a continuous ink system that he used for heat transfers, so the ink that it currently has in it is jet ink. I am looking to buy a printer and a continuous ink system but I want it for sublimation dyes. My question is, can I use that same continuous ink system that was being used for jet ink to change the ink to sublimation dyes? (of course after removing the jet ink) and if so how can I flush out the jet ink. Are the continuous ink systems for jet ink different from continuous ink systems for sublimation dyes? And lastly is it all worth the troubles. He is selling me the Epson 1400 plus the continuous ink system for $100, both items.
J.RU