User:Thepowerwasher

Pressure Washing The term pressure washing is used to describe high pressure cleaning such as to pressure wash before painting to remove old paint and mildew; "pressure-wash the house" http://dictionary.reference.com/browse/pressure-wash. This type of cleaning is accomplished by increasing the pressure of water well beyond the flow pressure available from the domestic water supply. The pressure part of pressure washing is generated by mechanical means, usually by a gas powered motor that powers a high pressure pump Pressure_washer. When used for commercial applications the pumps typically operate in a range of 2500 to 5000 pounds per square inch (psi). The higher output pumps are used in industrial applications i.e. 5000 psi pumps are used in pressure washing the barnacles from the bottom of ships, while the lower range 2500 to 4000 are used by contractors in property maintenance work i.e. parking lot cleaning and graffiti removal. Cleaning applications for the 1000 to 2500 psi pressure washers are commonly found in homeowner use for residential pressure washing work. The lower pressure machines are frequently electric powered units producing a limited water output expressed in gallons per minute (gpm) at pressures ranging from 1000 psi to 2000 psi. The cleaning effectiveness of pressure washing machines used in pressure washing is expressed in cleaning units. Cleaning units in pressure washing (CU) are the value that is calculated by multiplying the PSI times the GPM. (PSI x GPM = CU). Submitted by thepowerwasher @Thepowerwasher.com