I have an elderly gas CH system and low-pressure cold water system feeding the bathroom. While replacing some radiators, I've noticed that if the cold-water system is switched on, then water continuously dribbles out of the bottom of the CH system (when the stop-cock's open, of course).
This strikes me as being wrong.
The only place where the CH system meets the hot water system is in the hot water tank, which is isolated (I've got the feed valve turned off because I don't want the sludge in the cold water tank drawn into the hot water tank). This means that the only other possible explanation I can think of is that there's a system in place to top up the CH fluid from the cold water tank system.
Has anyone ever heard of such a thing? Because I haven't, and it sounds decidedly suspicious to me. (If the CH system needs topping up it means there's a leak that needs seeing to!) Can anyone offer any advice?
This strikes me as being wrong.
The only place where the CH system meets the hot water system is in the hot water tank, which is isolated (I've got the feed valve turned off because I don't want the sludge in the cold water tank drawn into the hot water tank). This means that the only other possible explanation I can think of is that there's a system in place to top up the CH fluid from the cold water tank system.
Has anyone ever heard of such a thing? Because I haven't, and it sounds decidedly suspicious to me. (If the CH system needs topping up it means there's a leak that needs seeing to!) Can anyone offer any advice?