I'm getter more and more confused by the advice in this thread.
None of what has been suggested will have an affect on the domestic water which is brown.
The only way this can happen is if, the heating has been connected to the hot pipe, but then that wont apply for the cold unless thats been connected as well.
As far as I'm concerned the cylinder coil must be split, or the water board has been working on the mains, but that don't answer why the kitchen is clear, unless the kitchen is mains fed and the hot is from another source e.g. combi.
Now I'm more confused
I would not add inhibitors or chemicals into the heating untill the hot water problem is resolved.
None of what has been suggested will have an affect on the domestic water which is brown.
The only way this can happen is if, the heating has been connected to the hot pipe, but then that wont apply for the cold unless thats been connected as well.
As far as I'm concerned the cylinder coil must be split, or the water board has been working on the mains, but that don't answer why the kitchen is clear, unless the kitchen is mains fed and the hot is from another source e.g. combi.
Now I'm more confused
I would not add inhibitors or chemicals into the heating untill the hot water problem is resolved.