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Multitube and pipe flap valves made from polymer

The dependable solution at the end of the pipe.

The self-actuating pipe flap valves prevent undesirable backwash into wastewater pipes in the event of backwater or high water levels. They are made entirely from polymer and so are 100% corrosion-free.

The pipe flap valves are available in various sizes from DN 100 to DN 1000.

Pipe flap valve in DN 150
Pipe flap valve in DN 250
Pipe flap valve in DN 800

Application possibilities

Pipe flaps are used for faecal-free wastewater, for example in seawater and freshwater environments. Here they are used as end pieces in horizontal pipes that lead into shafts or outside.


Area of use for the Multitube backwater valve

The Multitube backwater valve is suitable for use in leaching and pond systems and behind cisterns that are separately connected to a rainwater channel or that lead to a drainage ditch. It provides not only reliable protection against backwater, but also provides additional protection against rats, mice, frogs and vermin.

Pipe flap valve

For use as end piece

  Nominal size (DN)LengthWidthMechanical backwater flaps Item no.  
7910079100 100 120  mm 128  mm 1 79100
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7912579125 125 136  mm 151  mm 1 79125
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7915079150 150 142  mm 190  mm 1 79150
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7920079200 200 170  mm 248  mm 1 79200
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7925079250 250 220  mm 345  mm 1 79250
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7930079300 300 225  mm 400  mm 1 79300
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7940079400 400 295  mm 417  mm 1 79400
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7950079500 500 320  mm 522  mm 1 79500
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7960079600 600 345  mm 655  mm 1 79600
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7980079800 800 523  mm 1.035  mm 1 79800
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791000791000 1.000 495  mm 1.264  mm 1 791000
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Multitube backwater valve

Installation in an exposed drainage pipe

  Nominal size (DN)LengthWidthMechanical backwater flaps Item no.  
7125071250 250 730  mm 455  mm 1 71250
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7130071300 300 735  mm 525  mm 1 71300
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7140071400 400 900  mm 610  mm 1 71400
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7150071500 500 1.230  mm 700  mm 1 71500
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Not found the right product?

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.. 

Customised solutions