i have 20 m of extension microbore specifically for plugging into customers outside taps if available.it gives you a faster flow and makes the job easier.you dont need pure on polycarbon conny roofs or any plastic fascias/soffits.the only time i use pure water on these add ons is clear glass conny roofs or if no tap is available.regardsdazmond
tap water and a cleaning agent if necessary on plasticswhy waste pure!