Hygrade Products Limited 667B Great South Road , Penrose , Auckland 1061 New Zealand About Solutions products Companies Hygrade Products Limited Products Couplers & Gibaults Couplers & Gibaults 0 Share Universal pipe couplers and gibaults, designed to accommodate plain-ended pipes with different outside diameters, thus reducing stocks. Most popular related searches Customer reviews No reviews were found for Couplers & Gibaults. Be the first to review! Add your review Publish your review Great! review successfully added!