New hot water service gas been fitted further up the wall and is more compact than the old one, necessitating the extension of the gas pipe & the cold water in & hot water out pipes. These are all in copper and because the original setup lacked a water input isolation tap, one had to be added.
The plumber was relieved whennI told him the adjacent ducted gas heater was not being used, as the HWS need mains power. Which in turn meant no external power outlet needed to be fitted The other option was to hang an extension cable out either the toilet or bathroom windows.