Expansion Tank for DTF Printers. 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 the filter or expansion tank. The pigments from the white ink can clump together and clog it. This filter is suitable for DTF printers. The filter is equipped with fittings and connects using a 4 x 3mm or 4.2 x 2.8mm hose