screw this jpg
(71.91 KB, 787x778)

valve jpg
(57.61 KB, 689x856)

tools jpg
(106.63 KB, 1001x636)

dentist's tool jpg
(40.58 KB, 896x360)

 >>/52480/
indeed
 >>/52477/
You can tighten the valve body itself with a somewhat appropriate tool, so the valve won't come loose when using (=opening) it.
Remember, an appropriate tool; The valve body's thread is flattened on two sides.