Originally Posted by DrAndy
They say the blue water pipes eventually get fragile, which is a bad thing if buried in the walls behind tiles etc
Thailand now producers every different type of extruded plastic pipes for most applications but as a plastics man myself I would never use plastic pipes for hot water.
Up to you mate and to save some money I would purchase all the copper pipes and connections and just get a quote for the labour. Make sure your employed labour know how to silver solder correctly though!