Working without draining down

Joined
17 Feb 2011
Messages
19
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0
Location
Leeds
Country
United Kingdom
Hey is there any way of changing an old leaking radiator valve without draining the system. Its a sealed system.
 
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yep just screw down the caps on any auto airvent or/and isolate boiler if valves are good ones.
Release pressure either from drain cock or bleed nipple and system should form vacum close whichever before changing valve
 

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