When we buy new device such as 3M and WV-B3 we often through away most of the documentation but the warranty.
Very often issues with 3M and WV-B3 begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Water System 3M and WV-B3 is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Water System on our side using links below.