Hi all, this relates to a a job I've had done relating to a previous post problem. I have a new mains inlet that was supplying an unvented cylinder boiler setup - Ideal istor. Problem is it was limited by a 15mm supply pipe and a 15mm PRV so the flow rates were pretty poor - 8/9 LPM. Anyway, I've had this problem sorted - I now have a 22mm copper inlet and a specific 22mm PRV. Flow rates have increased to 15LPM approx as I have 22mm copper running up to the bathroom and ensuite.
However, my cold runs up in 15mm. The cold for the house is not directly off the mains but is after the PRV. So, my hot taps are pumping out at 15LPM and the cold at 10LPM. Because we cant install a separate cold water supply straight off the mains the plumber has advised installing 2 PRV's - one PRV for the hot and one PRV for the cold. The idea being that I could increase the pressure of the cold PRV which would increase the flow. We could increase the pressure of the cold to match the flow rate of the hot.
If we do achieve the same flow rate at the taps by increasing the pressure on the cold would this mean my showers then have a balanced feed? or would the pressures still be inbalanced even though the flow is the same and throw my showers out of syn? My plumber isnt 100% on this but said its worth a shot as he could just set the PRV at the same pressure as the hot one. Just wondered what your thoughts are on the flow/pressure issue? Thanks a lot
However, my cold runs up in 15mm. The cold for the house is not directly off the mains but is after the PRV. So, my hot taps are pumping out at 15LPM and the cold at 10LPM. Because we cant install a separate cold water supply straight off the mains the plumber has advised installing 2 PRV's - one PRV for the hot and one PRV for the cold. The idea being that I could increase the pressure of the cold PRV which would increase the flow. We could increase the pressure of the cold to match the flow rate of the hot.
If we do achieve the same flow rate at the taps by increasing the pressure on the cold would this mean my showers then have a balanced feed? or would the pressures still be inbalanced even though the flow is the same and throw my showers out of syn? My plumber isnt 100% on this but said its worth a shot as he could just set the PRV at the same pressure as the hot one. Just wondered what your thoughts are on the flow/pressure issue? Thanks a lot