Our Stop Silent Light backwater automats from Lasso Technik AG were developed for waste water applications. Due to its simple force-locking clamping inside the pipe, the automatic backwater valve can be installed in existing drain pipes or in inspection shafts. This reliable automat with backwater protection is suitable for private as well as industrial waste water applications and is designed with a backpressure of up to 0.5 bar. The automatic backwater valve also functions as a frog flap. This prevents smaller animals from entering your sewage system. Furthermore, the automatic backwater valve prevents odour nuisance from your waste water system.