... 3) Certification:ISO9001:2000; ISO14001:2004 Expansion Coupling1) Media: Water2) Material: UPVC,PE,PVDF3) Connection: Gluing, Rubber Ring Joint, Thread Inside4) Pressure ... in our products, please do not hesitate to contact us.. Expansion CouplingNumberSize (mm)NumberSize (mm)HS-II XI01Φ20HS-II XI06 ...