The Polypipe clip rails system is used on solid or screeded floors. This clip system is predominately installed in new build or renovation. Secure the clip rails to the insulation board by using clips (PB02911) Push the clips into the insulation at 200mm centres as to ensure that the clip rail is fully secured and lays flat to the insulation. Continue to fit the clip rail across the room at 1m intervals making sure that sufficient space is left around the perimeters of the room to accommodate any pipe returns or connection lengths back to the manifold.