Small and large waterkeys:

One of life's little problems, the sticky Amado Water Key, is now a thing of the past! The Pollard Water Key is the solution . Not only does it work great every time, it looks great mounted on your horn! The Amado Water Key was a great idea, but almost every brass musician has been frustrated with the "sticking" problem! Whether it sticks open or closed, stopping to clean the Amado is no fun.  Compare this old technology to our new Pollard Water Key. The conical shape of the piston inside the  conical shaped interior of the valve body eliminates the sticking, because the shape of the parts causes the piston to be in contact with the wall of the valve body ONLY in the seated position! Thus, the Pollard Water Key CANNOT stick!​