I have a towel radiator that really needs bleeding however I'm concerned that my boiler is going to need repressurising after bleeding. Most tutorials I have seen have had 2 blue taps that you need to open in order to increase pressure, however mine has 4 black taps and a yellow tap. I can see that it also has a notice about a pressure relief valve? Sorry I'm a novice at these things but don't really want to have to call someone out. The boiler is a baxi duo tec 2 28 ga combi. Any help appreciated.
Water – Repressurising baxi duo tec 2 28ga combi boiler
boilerwaterwater-pressure
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Best Answer
I really think you have to open 2 valves as in UK systems,there's an odd use of not having a 'load' valve integrated with combi. In your case I think you have to open the valves on the 'by-pass' pipe connecting the fresh water inlet to system return.
Open the circled ones: