PPro-Seal™ PP is ideal for use in piping systems where purity is not just required, but essential. To preserve cleanliness and prevent contamination, all PPro-Seal™ pipes, valves and fittings are specially packaged at the point of manufacturer. Like all thermoplastic products, PPro-Seal™ will not rust, pit, scale or corrode. It is not subject to electrolysis, providing years of maintenance-free, leak-free service. It is also very rugged.