Type GDU
The Type GDU Filter Nozzle, manufactured by KSH Germany, is used as the lower nozzle in pressure tanks and can be glued directly onto the riser pipe. It enables liquid draw-off while effectively retaining the filter medium, ensuring reliable and consistent operation. Absorb NZ is the exclusive New Zealand distributor of genuine KSH filtration nozzles and components.
Slot Sizes by Colour
Slot Size by Colour
- crop_square 0.2mm Slot Size - Ivory
- crop_square 0.3mm Slot Size - Green
- crop_square 0.35mm Slot Size - White
- crop_square 0.5mm Slot Size - Grey
- crop_square 0.7mm Slot Size - Yellow
- crop_square 0.8mm Slot Size - Blue
- crop_square 1.0mm Slot Size - Black
- crop_square 1.5mm Slot Size - Orange
- crop_square 2.0mm Slot Size - Green
- All
- Lower Riser Nozzles
Downloads
Downloads
Video
Watch the Orthos 4-Part Filter Nozzle Series
Deepen your understanding of filtration system design with the Orthos’ four-part video series — Filter Nozzles 101, 102, 103, and 104.
Explore everything from material selection and screen slot widths to pressure drop dynamics and advanced tailpipe construction for air scour systems.
Whether you’re an engineer, designer, or filtration specialist, these videos unpack the science behind high-performance nozzle systems — helping you optimise efficiency, durability, and performance in every project.