The innovative five-layer co-extrusion technology is employed in the product, enabling the simultaneous bonding of the five layers in a single composite. This ensures the oxygen barrier layer firmly adheres between the inner PE-RT layer and the outer PE layer, effectively preventing delamination issues. The pipe features a five-layer structure, with the oxygen barrier layer being a critical component. This type of pipe effectively blocks oxygen from entering the heating system through the underfloor heating pipes, reducing the oxygen content in the water, preventing pipe scaling, and extending the lifespan of metal components in the underfloor heating system such as boilers, valves, and manifolds. It also reduces the occurrence of corrosion.