A process to facilitate gravimetric separation of alkali metal salts, such as alkali metal sulfides and polysulfides, from alkali metal reacted hydrocarbons. Further, select pixels may be updated more than once within the normal update timing of a single video frame. In some positions, both beams pass through the polarizer and interfere, thus eliminating polarization fading. The mounting tube is operable to mount the faucet to a surface, to receive at least a portion of the valve body, and to connect to at least two hoses.