Polypipe Polyplumb 22mm Pipe Stiffeners are plastic inserts designed by the manufacturer Polypipe to provide additional support and stability to pipes in industrial plumbing and fitting systems. These stiffeners offer a secure and reliable connection to help ensure the structural integrity of the plumbing setup. With a 22mm diameter, they are designed to fit seamlessly into the pipes to provide a durable and long-lasting solution for various plumbing applications. Made from high-quality plastic, these pipe stiffeners are a vital component in ensuring smooth and efficient water flow within building systems.