Do I need to insulate internal pipework? Yes, internal pipework within the building should be insulated, any pipework installed externally if above ground should be isolated or trace heated to prevent freezing or warming.
What pipework should be used inside the building? It is recommended that when piping up the rainwater system that a different pipework material is used on the rainwater pipework to the mainswater pipework, this is to avoid accidental cross-connection of the two supplies at a later date. Stormsaver can provide WRAS approved pipework identification tape to apply to pipework to avoid any confusion of the contents and it is a requirement that this is used.
What type of pipework should be used underground? All rainwater harvesting supply pipework should be in WRAS approved black and green or clearly identified with black and green tape. Under no circumstances should pipework from the tank be run in blue.