Since
1942

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Lasso Technik - Your specialist for non-return valves since 1942

The Stop Silent Product Line

The Stop Silent SL13
Backwater flap

For waste water up to 0.5 Bar

Easy and quick to install without structural adjustments
Always closed and active against backwater
No mechanical moving parts and no electronics for a longer lifetime
Also serves as flat check valve (against frogs) and anti-odour valve

The Stop Silent
non-return valve

For clean media up to 16 Bar

Consists of two components only (membrane and support cone)
No moving mechanical parts, no electronics
Gentle closing, no water hammer
Low pressure drop
Low maintenance
Long-lasting