![Photo Hutterer & Lechner Air admittance valve with tee DN40x1 1/2', DN40 [Code number: HL 904T]](/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBMzV1QWc9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--29b5f6303612e4451c41465896cce45236ace7c7/HL_904T-photo.jpg?locale=en)
Air admittance valve HL 904T is designed for installation in unventilated sewer risers. The valve protects sanitary devices against disruption of water trap. Capacity is 5,5 l/s. You can mount this air admittance valve on a long horizontal pipe, but pipe length must be greater 4 meters. It is equipped with T-connection DN40 x 1 1/2'.
| Diameter | Material | Capacity | Weight |
|---|---|---|---|
| DN, mm | l/s | gr | |
| 40 | polypropylene | 5,5 | 136 |
![Draft Hutterer & Lechner Air admittance valve with tee DN40x1 1/2', DN40 [Code number: HL 904T]](/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBdVBBIiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--6eeabc20403e1e8bbf5f22755a6a5bf531994504/hl_904t-draft.jpg?locale=en)
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