Auto air valve

[Robert Anderson]

Hi guys quick question,

I got a new boiler fitted last April, always had small pressure drop 0.5 in 6/7 months in the old one which I just topped up couple of times, since getting the new one fitted when heatings on the upright rad in bathroom airs up in a week nearly to the day n then it went a month but I was loosing 0.5 bar a month the other day I seen water coming out the auto air vent it’s under the boiler my mate opened it up n there was water in the tube from the AA valve anyway guy came today fixed under warranty he said he didn’t think that would cause the drip in pressure but surely any loss in water will cause that and also let air in so therefore needing to bleed the radiator?

Any views on of that could be the issue?

 

[John.g]

Any drip will cause the pressure to drop, a 10L EV with prefill and filling pressures of 1.0/1.5bar will contain 2L of water (cold) so in 30 days/720hrs, only has to leak < 3.0ml/hr (2.78) to lose that vol of water