Magnesium-independent phospholipid phosphatase with broad substrate specificity (PubMed:17590538). Preferentially catalyzes the conversion of diacylglycerol pyrophosphate into phosphatidate but can also act on phosphatidate and lysophosphatidate (PubMed:17590538). Phospholipid phosphatases are involved in both the synthesis of lipids and the degradation or generation of lipid-signaling molecules like diacylglycerol (PubMed:28851360). a 1,2-diacyl-sn-glycerol 3-diphosphate + H2O = a 1,2-diacyl-sn-glycero-3-phosphate + H(+) + phosphate a 1,2-diacyl-sn-glycero-3-phosphate + H2O = a 1,2-diacyl-sn-glycerol + phosphate 1,2-dioctanoyl-sn-glycero-3-diphosphate + H2O = 1,2-dioctanoyl-sn-glycero-3-phosphate + H(+) + phosphate 1,2-dioctanoyl-sn-glycero-3-phosphate + H2O = 1,2-dioctanoyl-sn-glycerol + phosphate 1-(9Z-octadecenoyl)-sn-glycero-3-phosphate + H2O = 1-(9Z-octadecenoyl)-sn-glycerol + phosphate Magnesium-independent phospholipid phosphatase (PubMed:17590538). Inhibited by N-ethylmaleimide (PubMed:17590538). Lipid metabolism; phospholipid metabolism. Expressed mainly to the brain, kidney and testis, and to a lesser extent the bone marrow, thymus, prostate, liver and uterus. Belongs to the PA-phosphatase related phosphoesterase family.