On one side is the relase clip for removal from the spindle on the pipework. On the other side a lever which is H,W and M both of these self explanatory but, What is the sprung lever on top of the valve for?
Will you stop posting questions all over the place please,lol. It is a devil to try and keep up. HO ho.
Anyway, one lever slides across and opens the valve, and the other presses in and locks the first lever in the "on" position. Similar to the trigger on an electric drill etc.
