Cork Plastics Underground Drainage Systems comply with the requirements of Local Government Specification 1977. Cork Plastics PVC-U pipes are supplied in secure bales bound with straps within timber frames, we recommend that movement of bales is carried out by forklift or other mechanical device using webbing or rope strings. The bales may be stacked up to a maximum of three high, providing that the timber frames are placed on each other. Fittings are generally supplied in plastic bags and should be stored away from direct sunlight. If they have to be stored outside, the bags should be opened to prevent temperature build-up.