![Photo Hutterer & Lechner Consealed air admittance valve, DN 50/75 [Code number: HL 905N]](/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBNDZFQVE9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--b0857ee7a875304dae3ac92776e4c6f5913e48a0/HL_905N-photo.jpg?locale=en)
HL 905N - ventilation valve for horizontal pipelines. It is installed at the beginning of the pipeline. It prevents the water seal from breaking off from plumbing fixtures. It is made of polypropylene.
| Diameter | Capacity | Weight |
|---|---|---|
| DN, mm | l/s | kg |
| 50/75 | 13 | 0.39 |
| Height | Width | Depth | Weight | Volume |
|---|---|---|---|---|
| mm | mm | mm | kg | m3 |
| 140 | 180 | 180 | 0,39 | 0,004536000 |
Download data sheet: 
Consealed air admittance valve HL 905N
Download example of product installation: Consealed air admittance valve HL 905N
![Draft Hutterer & Lechner Consealed air admittance valve, DN 50/75 [Code number: HL 905N]](/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBL1JiQWc9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--9ab4a8aa053640b3fac911646a26d289443d9354/HL%20905N-draft.jpg?locale=en)