Closed Leaking Rad valve, But Boiler Still Losing Pressure.

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23 Feb 2014
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A lock shield valve on one of the radiators was leaking. Water was coming out from the top spindle. So I closed the thing. I don't see any water now. However the boiler still loses pressure everyday, albeit at a slower rate.

Is it possible that there's an unnoticeable leak on the lock shield valve ?
 
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Yes, it may still be weepimg slightly, but evaporating on hot valve before becomming noticeable. Tighten the gland nut a bit - not over tight. The gland nut is the small one below spindle on tap of valve.

Or you have a leak somewhere else.v Check other valves, drain off cocks, etc, etc, etc.
 
Yes, it may still be weepimg slightly, but evaporating on hot valve before becomming noticeable. Tighten the gland nut a bit - not over tight. The gland nut is the small one below spindle on tap of valve.

Or you have a leak somewhere else.v Check other valves, drain off cocks, etc, etc, etc.

The valve isn't hot, it's cold.

Anyway, I will try to tighten the gland nut.
 

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