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  • Backwater valves
    • Backwater calculator
    • Installation partner
    • Wastewater Fittings
    • Wastewater Technology
    • Wastewater Valves
    • Flap valves
    • Odor valves
    • Odor traps
    • Duct backwater flaps
    • Pipe flaps
    • Backwater automats
    • Back pressure in pipeline
    • Anti-flood valves
    • Backflow Control Valves
  • Non-return valves
    • Foot valves
    • Cone check valves
    • Diaphragm check valves
    • Non-Return Valves
    • Non-return armatures
    • Check Valve
Our Stop Silent® Non-return valves
have the movement efficiency of a jellyfish.
Non-return valves
Check valves to prevent the backflow of liquid and gaseous media. Our non-return valves are suitable for installation in flanges, water supply systems, pumping stations and cooling water systems.
Learn more
  • Foot valves
  • Cone check valves
  • Diaphragm check valves
  • Non-Return Valves
  • Non-return armatures
  • Check Valve
Backwater Valves
Check valves to prevent the backflow of liquid and gaseous media. Our non-return valves are suitable for installation in flanges, water supply systems, pumping stations and cooling water systems.
Learn more
  • Installation partner
  • Wastewater Fittings
  • Wastewater Technology
  • Wastewater Valves
  • Flap valves
  • Odor valves
  • Odor traps
  • Duct backwater flaps
  • Pipe flaps
  • Backwater automats
  • Back pressure in pipeline
  • Anti-flood valves
  • Backflow Control Valves
Our Stop Silent Products
Stop Silent Light
For dirty water up to 0.5 bar
  • Simple and fast assembly.
  • Retrofitting without structural adaptations
  • Always closed and active against backwater
  • No mechanically moving parts
  • No electronics
Learn more
Stop Silent
For clean media up to 16 bar
  • consists of only two components - diaphragm and support cone
  • no moving mechanical parts
  • gentle closing, no water hammer
  • low pressure drop
  • low maintenance
  • permanently
    Learn more

    Contact form

    Use our contact form to provide us with important information at the first contact so that we can process your request better.
    Contact us!
    Lasso Technik AG
    Niklaus von Flüe-Strasse 33 4059 Basel Switzerland
    +41 (0)61 3314090
    +41 (0)61 3314276
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    Lasso Technik AG
    Niklaus von Flüe-Strasse 33
    4059 Basel
    Switzerland
    +41 61 331 40 90
    lasso@lasso.ch
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