HDPE Butt Fusion Ventilation Cap for Siphonic Drainage

Key Features

• Venting and Anti-Negative Pressure: Connects the drainage stack to the atmosphere to balance air pressure and protect trap water seals.
• Insect and Debris Protection: Built-in grille or mesh prevents entry of insects, leaves, etc.
• Butt Fusion Joint: Fuses securely to the vent pipe end.
• Weather Resistance: HDPE material resists UV aging, suitable for outdoor rooftop installation.

Production Technology

• Injection molded from HDPE; the cap body features ventilation grilles or mesh
• The bottom is a butt fusion interface

Critical Process Parameters

• Ventilation grille open area meets airflow requirements
• Flatness of fusion face
• UV stabilizer content for outdoor durability

Typical Applications

• Venting at the top of siphonic drainage stacks
• Termination of vent pipes extending through the roof
• High points in drainage systems requiring pressure balancing

Application Scenarios

• Vent termination in siphonic drainage and venting systems
• Commercial building roof drainage
• High-rise residential buildings