The Wall Outlet Gravity Flap 100mm Kwikpack is a specialized external ventilation terminal designed for domestic extract systems, tumble dryer venting, and bathroom or kitchen exhaust applications. Manufactured from durable, weather-resistant materials, this gravity-operated flap assembly is engineered to withstand outdoor environmental conditions, UV exposure, and seasonal temperature changes while maintaining reliable, long-term performance.
 
Featuring lightweight, counter-balanced louvre blades, the unit opens automatically under the positive pressure of an active extract fan to exhaust air efficiently, then swings securely shut by gravity when the fan is turned off. This self-closing action prevents cold drafts, outside air, insects, and debris from entering the ductwork or backing up into the building interior.
 
Designed for straightforward surface mounting onto external walls, brickwork, or timber cladding, the 100mm spigot connects easily to standard flexible or rigid ducting runs. Whether you are installing a new extractor fan, upgrading home ventilation, or replacing a worn-out vent cover, this gravity flap delivers dependable protection, energy efficiency, and professional-grade airflow control.
 
PVC. Compliant with Part F of the Building Regulations. Suitable for commercial and domestic use. Suitable for use with 100mm round and 110 x 54mm rectangular ducting.
 
Not Suitable for Use with Gas Appliances
Flush Fit
W x H x D: 140 x 140 x 76mm
Free Air Space: 14,700mm?
PVC Construction