This Holman 50/40mm PVC DWV Cowl Vent caps vent stacks to help keep out debris, pests and rain while allowing free airflow. Sized to suit 40mm stacks with 50mm compatibility, it installs easily onto DWV pipe or fittings. The aerodynamic cowl design promotes ventilation of the drainage system, aiding odour dissipation and pressure equalisation. Constructed from durable, corrosion‑resistant PVC, it’s suitable for residential and commercial roofs or external walls where vent terminations require protection and reliable performance.

$4.50

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