Dave Liquorice wrote:

However you need a stopcock somethere that will work just for you.
Suggest you chat to your neighbours and arrange a mutually convient
time for you to shut the main stopcock and change your internal one.

I'll just wait for the power/water to be off again, shouldn't be long...

One though that has just occured about why your external stopcock has
seized so quickly after last use is that you mentioned WD40. If this
is a plastic valve the solvents in the WD40 may have done nasty things
to the plastics, or even any O rings in a metal valve...

Good point. Can't tell what the valve's made of at all, other than the
metal ridge along the top.

--
Steve Loft
Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/