The Manthorpe range of in-line tile ventilators can also be used as outlet terminals for extraction fans and soil pipe ventilation when used in conjunction with a Manthorpe GTV-AD Flexi Pipe Adaptor and one of the range of GRPA Flexible Pipes. This will convert the rectangular vent outlet to a standard 4 inch diameter pipe opening, which can be connected directly to the outlet of a soil stack or to a extractor fan Features • Quick and easy installation. • Converts vent outlet onto a standard 4 inch pipe. • Adaptor securely clips to the vent outlet. • No need to cut battens. • Connects to range of flexible pipe extensions. • Suitable for mechanical extraction fans. • Suitable for soil pipe ventilation. • Adaptor available for 4 inch to 3 inch pipes. • Designed for use with the Manthorpe Slate and Tile Vents, the GRPA Flexible Pipe range provides an economical, quick and effective connection to standard 4" soil pipes and ventilation systems.