Easter monday dousing

In Poland, on Easter Monday, people use to flush friends with cold water. They say, it brings health and luck. Now You can buy many ready pistols for this.

This coloured pistol fulfils two different functions thanks to two containers it has. One container is placed at the top and is filled with water and little colourful rings. There are also two buttons. If you press one of them a piston moves and pushes the liquid away. As a result, the coloured rings float.

If you pull the trigger, the piston moves and exerts pressure on water which has been sucked to the piston cylinder earlier. At the other end, there is a long and narrow tube through which water is shot outside. This narrow tube makes it possible for the water to reach a distance of 5 metres from the height of 1 metre. The narrower the tube is, the higher the speed of water.

The surface of the piston is comparatively small and it is enough to press it slightly to increase the pressure in the container considerably. Huge hydraulic presses work on the same principle which is known as Pascal's Law.