Primus is characterized by a simple and pure design. The tankless toilet takes up less space and is easy to assemble. The applied “Venturi” system together with AXENT Airless Siphon Technology make a powerful water flush possible without the need of a tank. The tankless technology not only fulfills leading flushing and water conservation standards while using about 25% less energy-intensive ceramics than conventional siphonic toilets, it eliminates the need for concealed cisterns and energy-wasting, maintenance-intensive electrical pumps. AXENT tankless technology is a breakthrough in toilet standards.