stopcock issue advise please

[BobbyJoe]

Morning everyone, if anyone could please offer advice on this issue it would help me with a massive issue regarding the water supply in my flat.
My flat kitchen and bathroom was always on mains supply (no tank supply at all) and the rest of the 5 flats were mains supply to kitchen and water tank to the bathroom. Since the water tanks (3 in total) were disconnected and everyone is now fed off the mains supply I noticed something with the stopcock in my kitchen.

Question:
Before the stopcock would only turn off the cold water supply in my kitchen but now it turns off the hot and cold water in my kitchen?
Could anyone please tell me why this has happened as no work was carried out in my kitchen, what would cause it to turn off the hot water supply now where as in the past it didn't?

Thank you and no work was carried out in kitchens only in the attic where the pipes go into and the water tanks were.

 

[Gasmk1]

You have a combi boiler ? If so no hot water when cold turned of. But even if you had a hot water tank eventually you would have no hot water with stopcock off

 

[BobbyJoe]

That's what I am puzzled by. I have a combi boiler and was never connected to the water tanks just to mains supply and the kitchen stopcock never turned off the hot water but now it does, so it's a mystery to what and why does it turn off the hot water now ever since everyone was connected to mains supply.
What could been changed that this has happened.

 

[Basher]

Maybe your flat was actually on a tank supply for longer that you thought, despite what you were told, and was changed over to mains supply at the same time as all the others?

 

[BobbyJoe]

I wish that was true, but the previous owners had it switched to mains supply in 2016.
The workers who disconnected the rest of flats also told me that they didn't touch my pipe supply as I wasn't connected to the water tanks at all.
This is what's baffling me to why the stopcock now turns off the hot water, what could it possibly be??

 

[Basher]

This is what's baffling me to why the stopcock now turns off the hot water, what could it possibly be??

Well your stopcock is now behaving as one would expect for a mains supplied system.
I can't account for why it was behaving differently before - I seem to remember you asking about this in a previous post some while ago.

 

[BobbyJoe]

Thanks for the replies. I am just trying to understand what the workies would have done to the piping in the attic that now my stopcock turns the hot water off from my kitchen where as before I could only turn off the hot water by turning the isolation valve on the gas combi boiler.
My pipework wasn't touched at all as it was always on the mains supply but my neighbours are now all on mains supply too and disconnected from the water tanks.