Being a humble DIY fiddler I have wrestled with a few gate valves in me time only to find that when you attempt to turn 'em off................you are taking your life in your hands, if you are lucky, they continue dribble/let through, if you ain't, they're seized and your best efforts only succeed in snapping their heads off, making it compulsory to shout your own arsenal of favourite theraputic expletives! They may be great in the short term but useless in the long term. Is there a modern version of these that actually will work 10+ years down the line?