In all my years I have never had an isolating ball valve fail — you just turn the little widget with a screwdriver and if the slot is across the flow then it’s off and in-line with the flow then it’s on.
The one shown below went to an electric shower which needed replacing. But as you can see after I dutifully turned it off it actually sheared inside (probably due to limescale build-up) so when I uncoupled the shower quite a lot of water spurted out. You live and learn.
Slightly embarrassing
Posted by Handy on September 7, 2014
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