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Excellent thanks alot. Neil

what is meant by vent the radiatiors? bleed??

Hi all, I am going to replace the Reduced pressuse zone valve / tube and filling loop valve, Part Glowworm 2000802600. Basically i can work out what need to be done to get the part replaced i can do that it the part that the manual refers to about:- "refill, vent and pressurise the...