The Ubbink OFT-1A/166 is a 166mm diameter capped stack breather vent for use in asphalt roofs
The OFT/1A has an integral collar and separate aluminium flange to withstand the high temperature during installation in asphalt roofs.
The OFT/1A is suitable for use with soil & vent systems and for both mechanical and natural (passive) ventilation installations.
Properties
Height above roof: 300mm
Flange diameter: 450mm
Depth below flange: 350mm
Free vent area: 20,000mm2
Pressure/airflow resistance: 1.0 Pa
Material
Type A: polyethylene stack / aluminium flange.
Colour: black.