M
musgrove
I am site manager of a block of flats in sunny glos. We have 35 off heatrae megaflow d 145 immersion heater tanks, half of which have leaking overflows which are damaging the fabric of a grade 2* listed building, formerly the largest woollen mill in the county. I have regenerated air pockets in line with instructions from HS tech dept, fitted non return valves in the hot water outlet pipes to prevent cold water back feed from shower mixer valves, changed thermal/pressure relief valves, all to no avail. I monitor the water pressure on site, which has a PRV limiting the pressure to 3 bar. The water temp is set to 60 - 70C.I am in danger of losing my sanity trying to stop these overflows from leaking. I have exhausted my patience with Heatrae Sadias tech dept, and i now know more about these systems than the 3 different plumbers who have tried to find a solution. Can anyone out there help, please?