Hi Gasguru
Yes someone else mentioned using a thermal store cylinder. It sounds like a possible option though I'm finding it hard to source one that isn't mains fed. The manufactures I've spoken too are a little warry of saying yes to using a product described as mains fed on a gravity fed...
I want to have a shower installed but this requires a bigger supply of hot water and an increase in water pressure. The simple solution would be to install a larger vented hot water cylinder with a pump.
I live in an 1970 block of 62 flats. The plumbing and electrics were put in and sealed in...