Predicted to enable phosphatidylinositol-4-phosphate phosphatase activity. Predicted to be involved in phosphatidylinositol dephosphorylation and regulation of endocytic recycling. Predicted to be active in clathrin-coated endocytic vesicle and early endosome. Is expressed in adult head. Orthologous to human INPP5F (inositol polyphosphate-5-phosphatase F).