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 Post subject: Slight pressure loss
PostPosted: Wed Jul 18, 2018 6:26 pm 
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I've fitted some new rads and pipework under my ground floor suspended floor.

There doesn't appear to be any leaks but when I re-pressurised the system (combi - intergas), I noticed the pressure drop slightly. I filled to 1.2 bar but after testing the next day it was 1.1 bar.

Like I said, there doesn't appear to be any leaks but I'm about to lay laminate flooring so once that is done, there will be no access.

Is there any other reason other than leaks that would cause pressure drops? All rads are bled properly.

I have the external expansion tank kit fitted which is larger than the one that goes behind the boiler, could this be taking up some pressure?

Ordinarily this wouldn't bother me but I really don't want to be ripping up the floor in 6 months.

Thanks


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 Post subject: Re: Slight pressure loss
PostPosted: Wed Jul 18, 2018 6:50 pm 
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Air venting from AAV in the boiler, possibly? As long as it doesn't keep dropping, no dramas.

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