Pipes QMAX (with an egg-shaped profile and a flat backing) are designed for the construction of gravity-flowing sealed pipelines for domestic and stormwater drainage. They are used mainly in the design of new drainage systems that will not be completely filled at the beginning of operation.

The Qmax pipe is a sealed reinforced concrete pipe with a flat backing. Greater self-cleaning ability at low flows compared to round pipes. The pipe is designed to withstand an internal pressure of 0.5 bar (approximately 5 m of water column). It is sealed with an integrated rubber sealing ring and has transport anchors