DWV Vent Cowl

DWV Vent Cowl
Available Sizes: 50mm to 150mm

The DWV Vent Cowl is designed to protect open-ended vent pipes that extend through roofs in drainage, waste, and vent systems. Installed at the top of a vertical DWV pipe, it prevents rainwater, debris, and small animals from entering the sewer system—maintaining clear airflow and long-term system performance.

Key Features:

• Shields open DWV vent pipes from rain, leaves, and debris
• Improves system longevity and reduces maintenance
• Snug fit on vent pipes using solvent cement for secure installation
• Manufactured from durable pale-grey PVC-U
• Available in 50mm, 65mm, 80mm, 100mm, and 150mm sizes

Update: 90mm Flap Valves with Mosquito Mesh

All 90mm flap valves now come standard with an integrated mosquito mesh flap, offering added protection against insects entering the system.
(Optional: If preferred, this can also be listed as a standalone item separate from the other flap valve sizes.)

Applications:

• Sewerage ventilation pipes
• Stormwater vents
• Above-roof drainage system terminations
• Greywater and blackwater vent terminations (residential & commercial)

Installation & Material Notes:

• Suitable for above-ground and exposed roofline installations
• Designed for solvent cement joints (SCJ)
• Allow 24 hours curing time for a full mechanical bond
• Made from PVC-U: rigid, strong, corrosion-resistant
• Not intended for long-term UV exposure without additional protection

System Compatibility:

• Matches standard DWV PVC-U pipe systems
• Complements fittings from 40mm to 150mm
• Integrates seamlessly with DWV vent lines and branch terminations
• Performance & Standards:
• Operating temperature: 0°C to 50°C
• Complies with AS/NZS 1260 for PVC-U pipes and fittings (DWV)

The DWV Vent Cowl is a vital finishing component for any vent stack, ensuring continuous airflow, system protection, and reliable performance against the elements.