The Komfort inspection chambers are also delivered with integrated backwater protection. Depending on the diameter required, closed channel passages in widths from Ø 110 to Ø 160 (Ø 200 only with backwater protection for wastewater without sewage) are integrated in the base section in the factory. Alongside the Staufix, SWA and FKA backwater protection devices, Pumpfix F backwater pumping stations can also be installed or retrofitted.