Reduction piece with a flexible couloured side. The coloured side must be put over the condensate drain.
- Yellow side B: 16 mm (inner diameter) to side A: 20/18/16/14 mm (outer diameter)
- Red side B: 18 mm (inner diameter) to side A: 20/18/16/14 mm (outer diameter)
- Blue side B: 20 mm (inner diameter) to side A: 20/18/16/14 mm (outer diameter)
- Green side B: 25 mm (inner diameter) to side A: 20/18/16/14 mm (outer diameter)