This invention consists of making conduits with a non-conventional inner section, delimited by certain flat algebraic curves of degree higher than 2, symmetrical with respect to the vertical axis and which have a marked point in their lower part with respect to the shape of their upper part, which allows an increase in the relative speed of the flow with respect to that of sections such as the circular and ovoid.
The use of these pipes is useful in pipelines that present problems of low flow velocities, especially those networks that must transport wastewater and rainwater at the same time, which therefore must be sized for a very wide range of flow rates, and also for networks installed in areas where the slope of the land is almost zero or even negative (opposite to the direction of flow).