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Filling Loops open or closed?

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14 Mar 2025
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Is anyone able to help?
this is the filling loop on my boiler, I needed to repressurise it this morning after bleeding the radiators. As it has no handle I used an expandable spanner and it slipped off of the knob when I tried to close it on reaching 1bar, o then struggled to get it back on before pressure hit 3 bar. I’m not sure if it’s open or closed now?! If I turn it either way it starts to leak very slowly, but when I have removed lots and lots of water from the radiators the pressure hasn’t moved at all suggesting it’s still open? My overflow pipe outside is also leaking. I’ve switched the boiler off for now. If the loop is still open will the pressure continue to rise over 3? Can anyone advise?
Thanks
 
If the loop is open the pressure will rise so if the needle is static then it will be off. You would also hear water moving if it were open so just check to satisfy yourself. It would be worth getting another handle for it or making some kind of reference mark with a marker pen on the valve head to signal the closed position.
 
If the loop is open the pressure will rise so if the needle is static then it will be off. You would also hear water moving if it were open so just check to satisfy yourself. It would be worth getting another handle for it or making some kind of reference mark with a marker pen on the valve head to signal the closed position.
Won't that depend on the pressure of his cold main supply.
 
Won't that depend on the pressure of his cold main supply.
As it has no handle I used an expandable spanner and it slipped off of the knob when I tried to close it on reaching 1bar, then struggled to get it back on before pressure hit 3 bar
Would suggest that his mains is at least 3 bar?

@BallR - may be time to get a new valve fitted?
 
It’s time for a new boiler to be fair, this is 21 years old! Am in the process of looking into it. Thanks for your help
 

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