Leak on feed side of radiator on a pressurized combi system?

I have a small leak from the valve joint on the feed side of a radiator, so the system which has halstead combi boiler is losing pressure. Do you have to drain the system? and if so whats the procedure? Thanks
Peter, October 2006


done
drain the system from a radiator with a drain tap fix the valve repressure the system use the filling loop on the boiler to about 1.5 bar bleed the rads not letting the pressure go below 1.0 bar.

hi-spec plumbing, October 2006
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