In the field of wastewater technology, we have specialized in backflow protection in sewage pipes containing faeces . Our Stop Silent SL13 backflow protection from Lasso Technik AG is suitable for quick and easy installation in industrial and private wastewater applications. It can also be used as a frog flap and as an airtight odor and radon protection flap in wastewater technology. Furthermore, our technology for waste water is ideally suited for installation in drain pipes and inspection chambers with a back pressure of up to 0.5 bar.