Since
1942

Automatic backwater valves with elastomer diaphragm for waste water applications

Automatic backwater valves with elastomer membrane for waste water pipes without moving mechanical or electronic parts for use in sewer systems

Our backwater automat for waste water applications

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.

Advantages of the Stop Silent Light automatic backwater valve

Automatic backwater valve for quick and easy installation in drain pipes and control shafts
Automatic backwater device to protect against the intrusion of smaller animals
Automatic backwater valve with reliable odour trap
Backflow protection in case of flooding

Functionality of our backwater automats

An accumulation of water in the pipework exert a slight pressure on the non-return valve diaphragm. The wastewater flow is then released by the membrane which opens its sealing lip upwards. If the water flow stops, the sealing lip closes again. In case of backflow, the membrane is filled with water and therefore pressed against the wall of the tube, which prevents the water from flowing up the tube. This function also blocks bad odours thanks to the qualitativ membrane.