CA Valve dribble

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CA Valve dribble

Post  jake52 on Fri Aug 26, 2011 7:46 am

Hi,

Is it normal for the CA valve to dribble occasionally? I've found that after turning the mains water supply off and back on I do get a small dribble from the valve into the tundish. The valve can release a little more water for a few days, never continually running.

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Re: CA Valve dribble

Post  Mike the Boilerman on Sun Sep 04, 2011 2:09 am

It's not unusual but neither is it correct. I wouldn't do anything about it unless the dribbling becomes continuous though.

HTH,
Mike

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Re: CA Valve dribble

Post  jake52 on Mon Sep 05, 2011 8:02 am

Thanks Mike

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CA Valve dribble

Post  Southampton Technician on Mon Sep 05, 2011 2:34 pm

Hi,
Could it be that the expansion tank has no air pressure? allowing shock waves in the water supply to lift the safety valve for a moment.
To check, release system pressure to zero and measure air presure of vessel with tyre pressure gauge. Pressure should be the same as initial charge pressure i.e. 1 bar.

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