Liquid filtering method and system

A filtering method comprising:

• (a) coupling a plurality of receptacles for filtered liquid respectively to a plurality of adapters and connecting respective filter units for liquid to be filtered respectively to the plurality of adapters, wherein each of the plurality of adapters comprises a respective adapter vacuum receiving port;
• (b) placing the plurality of adapters respectively into a plurality of cradles of respective bases in an initial pre-locking position, wherein each of the respective bases comprises a respective base vacuum delivery port;
• (c) first transferring the plurality of adapters respectively into the plurality of cradles from the initial pre-locking position into a secured pre-locking position;
• and
• (d) further transferring the plurality of adapters in the plurality of cradles from the secured pre-locking position into a locking position,
• wherein, in the initial pre-locking position, the respective base vacuum delivery ports are disconnected from a vacuum source,
• wherein, in the secured pre-locking position, the plurality of adapters are secured to the respective bases and the respective base vacuum delivery ports are disconnected from the vacuum source,
• wherein, in the locking position, the plurality of adapters are secured to the respective bases, the respective base vacuum delivery ports are connected to the vacuum source, and the respective adapter vacuum receiving ports drive the liquid to be filtered through the respective filter units and respectively into the plurality of receptacles as the filtered liquid.