gibault coupling Gibault Pipe coupling for PVC pipe was designed to suit for PVC pipe, PE pipe, steel pipe, D I pipe, cast ... iron gibault couplingGibault Pipe coupling for PVC pipe complying to BS3505 or MS628, the working presure is ... quick, leak free,and reliable method of jointing plain end PVC pipes for the conveyance of water and sewage.specification(DN)Length ...