Predicted to enable phosphatidylinositol-4-phosphate phosphatase activity. Predicted to be involved in phosphatidylinositol dephosphorylation. Predicted to be located in endoplasmic reticulum. Expressed in intestine; pharyngeal neurons; pharynx; spermatheca; and tail. Is an ortholog of human SACM1L (SAC1 like phosphatidylinositide phosphatase).