Without warning my hot water (and hot water only) has suddenly started running brown, and when I drain a tub of it silt like material is left in the bottom. I suspect it's rust. After running the water for a long time it does not seem to be going away. Am I right in thinking that this is probably my boiler and it should be replaced? The suddenness seems weird. Also: my family has been showing and bathing in this, could it be harmful in any way?
My toilet blocks repeatedly, what to do? [more inside]