Ok - so did some poking around today
The gas HW cylinder (old) is fed by a NEFA PR v/v, (been fitted where the header used to be)
Can this be cranked up a little?
I cant find where the mains water enters the house.
The closest outside tap to the rd, is attached to the block of the garage - on the backside there is no pipework - its inside the block
hmmm
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