White tongue is a coating of debris, bacteria and dead cells on your tongue that makes it look white. Although the appearance of white tongue may be alarming, the condition is usually harmless and temporary.
How a pressure washer works. Here's a quick summary of the basic principle: 1  Detergent flows in from a bottle or container through one hose. 2  Cold water flows in from a faucet (tap) through another hose and is filtered on the way in.3  An electric motor or diesel engine powers the washer. Cold water flows in from a faucet (tap) through another hose and is filtered on the way in. 2  An electric motor or diesel engine powers the washer. 3  Powered by the engine or motor, a water pump (impeller) draws in the detergent and water and mixes them together.
A pressure switch, or water level control, allows your washing machine to detect when it's sufficiently filled. It can then close the valve from which your home or building's water pressure pumps water into the machine. Your washer contains an air-tight hose that runs from the body of the washer to the pressure switch.