325mm diameter (240mm throat) RoofWhirlys4Africa sewer / toilet pipe vent for 240mm toilet / sewer pipe Posted on July 20, 2016August 28, 2020 by whirlyadmin Next → 325mm diameter (240mm throat) RoofWhirlys4Africa sewer / toilet pipe vent (aka whirlybird vent) for 240mm toilet / sewer pipe