I suppose that the pumping action with a higher air pressure at one point moving water along a fine tube or route inside a cable involves both pumping and capillary action to some extent. And a lower air pressure at some point compared to another sucks water along. The capillary refers to a "tube" with a hair like thinness of diameter, like fine copper wires contained in a P.V.C. insulation. Capillary, the origin is from the Latin capillus meaning  hair.


Z.

I suppose that the pumping action with a higher air pressure at one point moving water along a fine tube or route inside a cable involves both pumping and capillary action to some extent. And a lower air pressure at some point compared to another sucks water along. The capillary refers to a "tube" with a hair like thinness of diameter, like fine copper wires contained in a P.V.C. insulation. Capillary, the origin is from the Latin capillus meaning  hair.


Z.