OK, this is a bit off-piste, but bear with me...
I live in a flat in a block of 6. Originally, all the flats were served with water from a tank on the roof. Many years ago it was deemed essential that at least the main tap, in the kitchen, was served directly from the mains, not a tank.
Thus, all the flats got a direct mains feed to the kitchen sink, and the bathrooms and en-suites were still gravity fed from above. Being top floor, my gravity feed isn't great so I have pumped my main bathroom for the bath and shower, which works well. (The en-suite is a different story...)
I was chatting with a resident who was here when the mains feed was put in and I asked him why they didnt just take the mains feed up to the roof tanks and bridge out the downpipes via a manifold so that all supplies would be mains fed. He said he asked for that to be done and was told that "it isn't allowed". I subsequently discovered that other blocks in the area had indeed had that work carried out, so I don';t know why it wasn't allowed in my block, but no doubt there was a good reason...
Anyway, to the point. I can shut off my mains feed under the sink, but that does not shut off the feed to my bathroom or en-suite. To do that, I have to turn off the feed from the roof tank to my hot water storage tank...and the stopcock for that requires you to be very slim, lie on your back and using your 7' long arms, reack under the tank and turn it off. I had to jigsaw away half of the shelf the tank sits on to reach it, so I have NO idea how the original installers put that tank in. Incidentally, the immersion heater connection unit is at the back of that cupboard and there is no way I could ever get the faceplate screws off that with the tank in situ...except that I am blessed with 7' long arms!
Which long and rambly tale leads me to the final point...there may be more than one place to turn off more than one feed, and you can be sure that if you can't find the stopcock it's probably been overlooked in your search because "nobody would ever be so stupid as to bury it in there somewhere"...
but yes...somebody WAS that stupid.
Before you ask...yes, it is possible to go to the roof enclosure and turn the supply off there, but you need to be a midget, have a very long ladder, crawl through an almost non-existant void, and have several screwdrivers of different sizes to undo the 12 different screws hoolding the access panel on the housing...
I'd love to re-vamp the entire system but sadly that's not going to happen. All the supply pipes from above go down through my flat, then down through the flat below, etc etc...and the killer blow is...
All those flats are plumbed in stainless steel...which is a whole different story and why I hate plumbers so much!
Also why I hate kitchen and bathroom fitters so much. My kitchen and bathrooms were stripped out ready for refitting and they all sit in a line against one wall...how difficult would it have been to run a water pipe from the mains-fed kitchen through the 2 bathrooms to give them mains water? Answer: Easy!
Why did they not do that? Lazy, stupid no fekn idea.
...and my wife insisted that I not do the refurb...let the professionals do it...
One day I'll delight you with the electrics...
On a happy note, this coming Friday is Pie Day, so make sure you all celebrate appropriately!