4" UPVC Vent Cowl

Key specs: 4" diameter, made from durable UPVC, UV-resistant to prevent fading or discoloration, designed to fit over a standard 4" vent pipe, and suitable for exterior use.

Installation is straightforward: place the cowl over the top of the vent pipe, align with the pipe, and secure it using screws or an outdoor-rated adhesive. No special tools are required, and it’s designed for quick, tool-light installation.

Yes, it’s designed for a standard 4" vent pipe. Mount by placing the cowl over the pipe and securing it with screws or adhesive, ensuring a snug, level fit to prevent movement during wind.

Clean with mild soapy water and a soft cloth. Rinse thoroughly and inspect periodically for cracks or UV wear. Avoid harsh solvents that could degrade the UPVC, and wipe dry after cleaning to prevent staining.

The 4" version is sized for a 4" vent pipe and provides the same rain and wind protection as the 3" model, but is designed for larger ducting. If your vent pipe is 3", consider the 3" version here: https://fepy.com/product/3-inch-upvc-vent-cowl

The 5" model is for larger vent openings and provides similar rain and wind protection with a bigger footprint. If your vent pipe is 5", consider that option here: https://fepy.com/product/5-inch-upvc-vent-cowl

It's ideal for exterior vent pipes on walls or roofs facing exposed weather, bathrooms or kitchens with external vents, and any installation where you want to prevent rain ingress and reduce wind impact on the vent opening.

Install with the vent unobstructed to maintain airflow. Use outdoor-rated fixings and sealants, avoid over-tightening screws, and follow local building codes. Ensure the cowl is fully dry before exposure to outdoor elements.

UPVC is corrosion-resistant, UV-stable, lightweight, and typically easier to install and maintain than metal equivalents. It provides durable rain and wind protection without adding significant weight or complexity to the vent installation.

Measure the external diameter of your vent pipe. The cowl is designed for a 4" pipe; if you’re between sizes (e.g., slightly undersized or oversized), consider the closest size (3" or 5" models) to ensure a secure fit, or check for additional size variants on Fepy.

Avoid misalignment with the vent opening, over-tightening screws which can crack UPVC, and installing in areas with conflicting obstructions. Ensure the surface is clean and dry before applying adhesive, and verify the cowl sits properly to shed water away from the vent.