Y strainer Thread Size DN(Nominal diameter) Body Material DN15 1/2'' 15mm Hpb59 or hpb57 DN20 3/4'' 20mm Hpb59 or hpb57 DN25 1'' 25mm Hpb59 or hpb57 DN32 1¼'' 32mm Hpb59 or hpb57 DN40 1½'' 40mm Hpb59 or hpb57 DN50 2'' 50mm Hpb59...