Great ball valve that lasts, I have never had to replace one of these valves and will not use anything else. The valves that I used to pick up at my local supplier would last 3-4 months tops but these valves have never been replaced. Every 6 months when I replace my lead solution hose this is the valve that gets put on.
These really are one of the best valves. I would have given it 5 stars but sometimes they leak from the knob. I have had some that last a couple years and some that last a couple jobs.