Epson 4720 Printhead Ink Dampener. With DTF inks, regular printer cleaning is necessary. However, despite regular maintenance, you may still experience printing problems. It might then be time to replace your dampers. The ink damper seal can wear out and allow air to enter. If this happens, you will notice printing gaps at startup and poor print quality. We recommend replacing the dampers when changing the printhead. The damper connects using a 4 x 3mm or 4.2 x 2.8mm hose