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just to educate myself - am interested in finding out how things work

just trying to find out roughly how they work / why they go faulty / signs when they go faulty

ok thanks for the help mate, do i order that direct from Worcester? I was going to get a full bore isolating valve from screwfixx, the dearer one tho!!

Great website - my second post but I'd like to ask all boiler engineers a question if I may please? On a PCB inside a boiler what parts does it contain - I know it's the electronic part that sends out and receives voltages from other components, but how does it do this?

ok - worcester in general or just the junior?! why do they leak?! will the way i asked be ok to fit a new one or do i need a specific isoaltion valve replacement from them? i was going to pop down to screwfix and pick up a 22mm compression ball-o-fix ....?

it is how did you know that?! a worcester junior 28i combi

One of the isolation valves underneath my boiler has developed a leak, and the pressure drops regularly due to this :( What's the best way to change it - drain down the primary system - and what type of valve can I fit - will a 22mm ball-o-fix compression swap be ok? Probably need to alter...