My house is compact 4 bed. with conventional CH and HW system, tanks in loft. The primary has Fernox inhibitor, 8 litres. What concerns me, is that the primary header tank seems to get brownish coloured scum form in it, bit off an off-odour as well. Anyone know what could cause this? I did reckon the system could be pumping over, as the vent pipe did not appear to run high enough - vent pipe to header water level should be half inch for every foot between header tank water level and boiler base I was told - so I made the vent pipe run to a higher level before dropping to a position over tank. Any info. would be appreciated, thanks.
- posted
19 years ago