Liquid distribution system and method

A method for supplying a paint for coating of a workpiece, said method comprising:

• a) providing a paint distribution system comprising:
• at least two paint reservoirs;
• at least one spray station paint assembly;
• a plurality of paint circulation lines disposed between said paint reservoirs and said spray station paint assembly;
• at least one paint color change assembly;
• a plurality paint supply lines in fluid communication between the spray station paint assembly and the paint color change assembly;
• at least one circulating pump configured to supply pressure to said paint distribution system;
• said circulating pump having at least one input, configured to receive input data signals;
• a measuring device for measuring one or more parameters of a paint;
• said measuring device having at least one input, configured to receive input data signals, and having at least one output, configured to transmit output data signals;
• said measuring device positioned on a paint supply line in fluid communication with the at least one paint color change assembly;
• and
• one or more controllers having at least one input, configured to receive input data signals, and at least one output, configured to transmit output data signals;
• wherein one or more output data signals are transmitted from said measuring device to said controller, said controller generates one or more output data signals based on one or more input data signals received from said measuring device, and the output data signals from said controller are transmitted to said circulating pump to maintain or adjust circulating pump settings to control supply pressure to said paint distribution system, and thereby maintain or adjust the one or more parameters of the paint within a predetermined range in real time;
• and
• wherein, for the measuring device positioned on the paint supply line in fluid communication with the paint color change assembly, the paint supply line and the paint color change assembly are more distant, in fluid communication, from the circulating pump than the other paint supply lines and paint color change assemblies of said paint distribution system;
• b) circulating one or more colored paints through the paint distribution system;
• and
• c) coating the workpiece with the one or more colored paints.