flushing out central heating system!

[jono,b]

hello, how can i flush out my c.h system, i can drain and refill the system no problem, but there is a lot of sediment in the system, ie valves and rads,... this is a old house and a old system, is there any degreaser product that i can flush through my system?

 

[Mike Jackson]

Fernox F3 or sentinal X400 in the system for 2 weeks plus. Run system and check that all radiators are evenly hot top to bottom. If everything is heating evenly then you need to flush out the system thoroughly. I'd be inclined to fit a magnaclean as well while you're at it.

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Mike