Miele PWT 6089 Vario Operating And Installation Instructions page 94

Installation - extraction ducting
1 Connection to the main venting duct
2 Miele non-return flap*
3 Additional Miele adapter*
4 Miele flexible ducting hose*
^ Push the non-return flap (2) all the
way into the adapter (3).
(* optional accessory)
94