The internationally patented coupling DynaVariacor®, makes flexible and easy to handle all the supply hoses of washing pistols: Installed between the pistol and the hose, reduces efforts, increases the pistol’s manoeuvrability, avoid hoses’ twisting and makes easier washing in hard to access areas. Eliminates premature wear of the supply hose. The internal section keeps constant whatever the angular position, thus the drop in pressure are reduced and it does not affect the pistol’s flow. This coupling is robust, light and compact and it exists various dimensions and connections. Reduces muscle strain caused by the rigidity of the flexible, easy washing in places with difficult access. Durable, thanks to mechanical stainless steel components and Aluminium body for food application.