Siphonic taking advantage of the system is basically the principle of equivalence of the fluid energy of the water without any slope is to be evacuated from the gutter or the roof. Account for the solution of this complex hydraulic flow Bernoulli's equation of motion is the basis. Today siphonic system software used in a variety ofsolutions for faster and more efficient solution. Thus, an even more complete, complex networks definitelysolved. To compensate for differences in pressure and flow rate of the system involves using tubes of differentdiameters. This is important to reduce the losses in the use of different materials.