Main water valve, cannot find it

CBW1982 said:

I wouldn’t rule it out, I have seen them in new build care home with an access panel by front door which is where the main stopcock is located.

Click to expand...

Thank you CBW1982 and to everybody. I have found a valve outside the front door. I didn't try yet, but I think it is likely to be the main water valve. It is in between gas pipes.

Certainly looks like a stopcock all you can do is try isolating it and see what it does best of luck . Kop

Pay an experienced plumber to just look around for a hour, or ask your neighbours who they use and call them ...they might know things from past experience. Rob Foster centralheatking

Hi Sarah
First of all don't touch the plug cock under the floor. It is the old scour cock (=drain cock) for the hot water cylinder. It allows the water in the cylinder to flow away into the drain. If your cylinder is still in place and you open that, you will be unable to heat the water as the cold tank will constantly be running into it. If the cylinder has been replaced as you seem to be saying there is a risk that the lead pipe has not been blanked off and you could leak on the neighbours below. It has nothing to do with the main supply.
Your main water stopcock will originally have been at high level where the mains water from the lead riser ran into the cold water tank. If you are in a top flat it could have been in the roofspace, otherwise most likely above the bathroom.
If you still have a cold water tank that is the place to look (the lead riser ran up the building and each flat had a branch at high level, you will only have a branch lower down if you are a top flat and the riser has been altered, or if the high level branch has been run downwards to supply taps). As you rightly say, a stopcock on the riser would turn off any flats above you, so that has never been normal practice. The stopcock which does turn off the whole tenement is under the road, called a Toby cock.
I don't know whether you have some reason for not contacting an Edinburgh plumber but that's who you need, not Scottish Water.
Most of us give free estimates and would locate the stopcock for you in the course of the examination.