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Staufix Siphon Ø 50 backwater valve

The standard-compliant solution for siphons.

The Staufix Siphon backwater valve with a nominal size of DN 50 serves as protection for individual drainage points such as washbasins, showers or washing machines in rooms below the backwater level. It is installed in drain fittings and is available as a siphon for washbasins and with an inlet funnel for the emergency overflow of heating systems.

Thanks to the standard-compliant sizing, they are a guaranteed fit in existing installations, regardless of the manufacturer.

Advantages  Article overview

Area of use

The backwater valves are versatile in use: as individual protection for washbasins or washing machines or as an emergency overflow for heating systems.


TheStaufix Siphon Ø 50 small backwater valve is the first standard-compliant backwater valve according to EN 13564 Type 5.

Tool-free maintenance

The maintenance and cleaning of the backwater valves is particularly convenient and possible without any tools whatsoever thanks to the quick-release closure.

Staufix Siphon Ø 50 backwater valve

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In addition to our standardbackwater valves, we develop individual solutions for special requirements – in terms of form, function and dimensioning – at the customer's request.. 

Individual solutions