Can't isolate outside tap

[crt8]

I have been trying to turn off my outside tap for winter. When I turn the valve under the kitchen sink, it fails to stop the outside tap from running. This valve does seem very stiff. I am assuming I have to turn the value clockwise since if I turn it anti-clockwise it actually starts dripping into the cupboard. Anyway, it won't turn off whether I turn it clockwise or anticlockwise. I am assuming some sort of fault with this valve? It is an easy job to fix? Thanks in advance.

 

[Ben-gee]

Nobody has any clue what you’re on about, please post a picture of the pipework under your sink.

 

[crt8]

Sorry about that. I'll try again!
The tap in the photo (which is under my utility room sink and is supposed to isolate the water supply to a tap in my garden) doesn't actually seem to isolate the water supply. That is basically it!
I have tried turning it both ways. However, the garden tap still runs.

 

[ShaunCorbs]

It might take a good 5 minutes to turn off

How many turns are you turning that tap ?

 

[crt8]

Well I attached a hosepipe and left it running but a good 5 minutes but there was no sign of it stopping. I think the stopcock is frozen up but I don't want to force it in case it breaks and I end up with a flood or something. Surely turning the water off shouldn't be so difficult!

 

[ShaunCorbs]

So it doesn’t turn ?

 

[crt8]

It's now sorted but thanks anyway everyone.

 

[ShaunCorbs]

And how did you turn it off ?

 

[crt8]

And how did you turn it off ?

I got a plumber!