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Apologies I am not clear on the difference between a zone valve and a valve.

Hi, Thanks for getting back to me. I see 5 big valves coming into the bottom of the boiler. Sorry this obviously doesn't help much as I am an amiture without a user guide. Two of them have black plastic control leavers and when I open these together it allows water into the system, this much...

Hello & Happy New Year! I went away for the holidays and have returned home and my central heating doesn't want to kick back on. The hot water is working fine and the pressure is about 1.7 bars. The heating is in the timer hours and I have turned the thermostate up too. I have tired turning...