Moulds for drinking water supply systems,including coupler, elbow, tee,cross, reducer, female/male thread elbow, valve so on. General Design1.1 The mold(s) should always have interlocks for both cavities and cores.1.2 The mold(s) shall be generally provided with venting facilities. These venting facilities shall be provided at the end of the flow way and near to flow lines.1.3 The mold(s) should ...