Overexpression leads to increased undecaprenyl diphosphatase activity and to increased resistance to bacitracin. May have a preferred substrate other than undecaprenyl diphosphate in vivo. di-trans,octa-cis-undecaprenyl diphosphate + H2O = di-trans,octa-cis-undecaprenyl phosphate + H(+) + phosphate Belongs to the BcrC/YbjG family.