There are basically two types of pumps used in the carpet cleaning industry. 12 volt and 110 volt (also sometimes people may say 115 volt and 120 volt, but they are the same as 110 volt).
12 volt pumps are usually used in the trucks to bring fresh water to the machine. These are referred to as demand pumps.
Then, there are the 110 volt AC pumps that run portable and electric truckmounts. These are actually powered by household outlets. There are referred to as pressure pumps.
Carpet cleaning machine pumps at Magic Wand Company.