Hi
I live in the basement and ground floors of a three storey building. The mains water for the upper flat goes through my flat. There is currently no way to turn off the upper flat's supply without access to my property, the stopcock being in my basement. This scares me.
I'm going to try and convince my neighbour to add an isolation valve just as the mains enters his property.
Which type of valve should I mention to him? I've read about 1/4 turn ball isolation valves but am a bit confused about the flow issue/narrow bore. All the pipework is 15mm.
Is this sort of thing correct/best?