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The Polypipe grey flexible barrier plumbing and heating pipe comes in 15mm, 22mm, and 28mm diameters. It's perfect for use with PolyPlumb PolySure and Underfloor Heating systems. Made from polybutylene, these pipes offer top-notch flexibility and efficiency. Polybutylene is great for domestic hot and cold water plumbing and heating systems. It ensures exceptional durability and long-term performance, making it a top choice for modern building projects. Its natural flexibility allows the pipe to bend into the tightest spaces. Available in 3-metre lengths, this pipe design is reliable and has been well-tested for 30 years.. Polypipe Barrier Pipe - 15mm x 3m Plastic Polybutylene PB315B