The AquaTap is a simple device that fits on top of the waterfed pole.
It fits on any pole with a standard screw thread in seconds. It makes no difference if the hose is internal or external, or if the pole is telescopic, modular, or whatever. Use your own hose, your own brush, your own gooseneck or angle joint.
Controls water from a trickle to full blast as well as off and on. A simple quarter turn on the bottom of the pole operates it. No need to remove your hands from the pole, or even reposition a hand on the pole, or take your eyes off the brush. Works as good with hot water as it does with cold. Only one moving part so very reliable. You work the way you have always worked, with the equipment you have always worked with.