The difference between contact and non-contact washing with best pressure washer uk occurs in the second cleaning step, after the surface has been wetted with water. Next, use detergents. During contact washing, they are applied in the form of a solution with a sponge or brush, the dirt is cleaned off with the same tools, while pouring water on the surface to be cleaned. Contactless washing takes place as follows: active foam is applied to the surface using a foam generator and left for 2-3 minutes to act. The third stage of cleaning, common to all types of sinks, is washing off the dirt with a jet of water. If you want to use a more progressive method, contactless washing is suitable for you, in the store it is represented by models with a maximum working pressure of 120 bar and a capacity of 450 l / h and more.