As the mine face advances, the increasing length of the water supply line requires that attention be given to the plumbing system to economically deliver an adequate water flowrate and enough terminal line pressure to maintain satisfactory dust suppression at the site. Three nomographs were designed. In determining pressure losses, it is common practice to use the value of the reynolds number (R) of 2,000 as the dividing line at which flow changes from laminar to turbulent. Therefore, one of the nomographs relates r to water flowrate and pipe diameter. The other two, one for turbulent flow (R > 2,100) and one for lamina flow (R < / = 2,100), relates water flowrate, pipe diameter, velocity of water, and pressure loss. Using known or estimated values for any two of the variables, the third and fourth ones can be read from the nomographs with the aid of a straight edge. These nomographs should expedite and simplify the design of a satisfactory plumbing system.