unvented system.
I have to change a friends kitchen sink and taps which looks manageable
enough but I note that the water/heating is an unvented cylinder with
expansion and pressure safety devices aplenty. I know the system delivers
hot water at cold mains pressure but how do I shut off the hot supply so I
can disconnect the tap(s). Does turning off the Cold main isolate the hot
supply as in combi boiler?
Thanks
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