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Pipe Coupling iron Pipe Coupling for PVC pipe complying to BS3505 or MS628, the working presure is 16.0 bar; it provides a quick, leak free,and reliable method of jointing plain end PVC pipes for the conveyance of water and sewage. specification(DN) Length of sleeve OD of pipes Bolts&Nuts(N-M) working pressure material of O-ring 80 100 88.9 4-1/2" 1.6MPa EPDM 100 110 114.3 4-1/2" 1.6MPa EPDM 150 130 168.3 4-1/2" 1.6MPa EPDM 200 150 219.1 4-3/4" 1.6MPa EPDM 250 165 273 4-3/4" 1.6MPa EPDM 300 170 323.9 5-3/4" 1.6MPa EPDM - QINGDAO VALTECH MANUFACTURING CO., LTD. Jihongtan Town, Chengyang District, Qingdao City, Shandong Province, China