Flexible potable water supply line pipes, not of metal, for use in plumbing systems of residential dwellings and commercial buildings and sold through home improvement retailer stores; all made in whole or substantial part of polyethylene plastic; Elbows of metal for flexible potable water supply line pipes sold through home improvement retailer stores; Manually operated metal valves for use with flexible potable water supply line pipes sold through home improvement retail stores; flexible potable water supply line pipe coupling of metal sold through home improvement retail stores; Junctions of metal for flexible potable water supply line pipes sold through home improvement retail stores; all made in whole or substantial part of polyethylene plastic; Non-metal elbows for flexible potable water supply line pipes for use in plumbing systems of residential dwellings and commercial buildings and sold through home improvement retailer stores; Non-metal fittings for flexible potable water supply line pipes for use in plumbing systems of residential dwellings and commercial buildings and sold through home improvement retailer stores; Nonmetal flexible potable water supply line pipe couplings and joints for use in plumbing systems of residential dwellings and commercial buildings and sold through home improvement retailer stores; all made in whole or substantial part of polyethylene plastic; "PUREPEX"