The photo is misleading. It is very small in length. The switch returns to the off position if you let go of it. You have to keep it pressed. Uncomfortable.

At first it was okay, but after about two years, because the closure seems to work with water pressure, the system has broken down and it's very difficult to get it to close.

I just installed it on a different brand battery and it is perfect. It fits perfectly, there are no leaks, and the flow is smooth and very satisfactory.