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I took the trv off the inlet pipe and had a bit of a poke around inside it with a wire coat-hanger and a bit of old net-curtain wire. When I let the water flow through again a fair amount of gunk came out. Mainly nasty black metallic particles. I repeated the process two or three times to...

It's not plastic piping it's copper piping. Having taken the radiator off and opened the valves what I've found is that that water shoots out of the lockshield valve end at a very fast rate, as though under pressure, but barely trickles out of the TRV end - even when the pump is running. So I...

Hi, I have a radiator which refuses to heat up. I've removed it and flushed it through, it seemed to be fine, and have replaced the TRV and the lockshield valve. I have also flushed the whole system through with Fernox Heavy Duty Restorer but there just doesn't seem to be any flow through...