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Hi, I have the opportunity to add a larger radiator downstairs and have drained down the entire heating system. I intend to give the whole thing a rinsing through. I remember when this was last done several years ago I had all sorts of issues with air in the primary heating circuit when DHW was...

I have a combined F/E pipe in the airing cupboard. The pipe travels up the wall to approx 7 ft then enters the loft. The pipe then runs towards the F/E tank which is in the middle of the loft approx 15ft from where the pipe enters. The pipe run is on a slight incline. When my hot water...