15mm x 2mm Pert-Al Pipe for Underfloor Heating See our other items High Specification Pert-AL Pert pipe 15mm diameter with 2mm wall. Service temperatures: 40°C - 95°CMaximum Working pressure: 10bar Five-layer composite pipe combines the benefits of both metal and plastic pipesAluminium core prevents ingress. 25 Year Manufacturer's Guarantee.