Hygrade Products Limited 667B Great South Road , Penrose , Auckland 1061 New Zealand About Solutions products Companies Hygrade Products Limited Products Pits & Grates Pits & Grates 0 Share Small PVC catchment pits, with grates, for domestic water reticulation. Most popular related searches domestic water Customer reviews No reviews were found for Pits & Grates. Be the first to review! Add your review Publish your review Great! review successfully added!