Discuss Gurgling and air in central heating in the Central Heating Forum area at PlumbersForums.net
Will see if there are isolating valves behind.
The pressure only drops/rises when the pump goes on/off. Not during heating.
Haven’t checked when using hot water but will check tomorrow.
@johntheo while I was looking I noticed this.
Also some of the copper pipes into the boiler have this.
Anything to worry about?
Ok, I’ll try this tomorrow along with the hydrogen check!That is the filling loop with a non return valve where shown and a isolating valve where shown on the other end, ensure the isolation valve is closed "across (at right angles to) the pipe" then just slacken the flexible hose where attached to the NR valve but do not remove it, when slackened a few turns water should only dribble out for a few seconds and then stop.
There may be another isolation valve on top of the NR valve but I don't think so, if there is, shut it as well
No, I think it highly unlikely because even if the flexible hose is perished/holed then with a sealed system the pressure should still keep the NR valve shut. I also find it difficult to imagine that you are pulling in air anywhere in the volumes that you are getting especially if the boiler pressure is normally 1bar or higher. Lets hope in one way that its hydrogen!.
Yes, definitely remove (after first slackening) that filling loop, it's only hand tightened at the connection to the NRV, obviously ensure that the isolaton valve is shut, as it appears to be, then post back.
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