I have a new 4 bed house which has a 25mm MDPE water supply pipe installed. Everybody told me, including the water board, that 25mm was sufficient for a 4 bed house. A plumber quoting to install the system has suggested that a rising mains pipe of 28mm be used, then distribute with 22mm pipes. He says that, if I do not want to change the supply pipe to 32mm, the 25mm may be adequate. The system will have mains pressure supply to outlets. No water tanks in the roof. The water company supply is 3 bar.
My question is, does it make sense then to have the 28mm rising mains pipe, as opposed to 22mm if I leave the 25mm supply? is there a benefit in my system?
My question is, does it make sense then to have the 28mm rising mains pipe, as opposed to 22mm if I leave the 25mm supply? is there a benefit in my system?