Indeed I are, cheers ;)
What was it BGB said? Trying not to appear suspicious? LOL
It's probably cavitation caused by zinc dissolving from the brass. Often happens when valves are almost completely shut and more than a few years old. That's not to say that age is the issue, could maybe be too high flow rate in the heating. Try turning the circulator speed down? Or balance the rads.
( blaireau69 , the Cumbrian Travis Bickle., Thu 10 Nov 2011, 22:10, 1 reply, 14 years ago)

Turning the what now?
My boiler is ancient and there is only a heat dial. I know how to top up the boiler when the pressure dips, though where does the water go when that happens?

Balance the rads? You what?
(dozers, do fuck off ur a nob m8, Thu 10 Nov 2011, 22:15, Reply)

Central heating has a circulator (pump) to circulate the warm water round yer arse.
Circulator has 3 settings.
Too fast and it'll make noises.
You've got 2 valves on each rad, one at each end.
One is the TRV, opens and closes on demand.
Other is lock-shield valve, should be set by plumber to ensure equal flow through all rads.
Water is a lazy cunt and will find easiest route through system.
( blaireau69 , the Cumbrian Travis Bickle., Thu 10 Nov 2011, 22:23, Reply)