Model: AV50 Type: Updraft Vent / Air Admittance Valve (AAV) Nominal Size: DN50 (50 mm) Connection: Female threaded (appears BSP) Material: Cast metal body with internal mesh Function: Allows air intake into pipework while preventing backflow and debris ingress Condition: New (unused surplus) Inclusions: Valve body with internal mesh as shown Notes: No manufacturer markings visible; AV50 marking appears to denote size/model rather than brand Country of Origin: Unknown HS Code: 848180 Shipping: Shipping from Sydney, Australia.
