Unifix Pre Insulated Pipe system is a factory fabricated for below and above ground distribution of hot or chilled water gas petroleum products and other substances. The system is designed with heavy duty carrier pipe made of Steel PVC HDPE, Polyurethane Foam Insulation and a sleeve made of HDPE (High Density Polyethylene) as a jacket. Pipe in pipe insulation also available in spiral duct cladding.