The McAlpine WC-F23RV is a flexible toilet connector designed to connect a toilet pan to a 4"/110mm soil pipe. It has an inlet range of 97-107mm, which makes it suitable for a range of toilet pan sizes. The connector also features a 1¼" universal vent boss, which allows for the connection of a soil vent pipe. This helps to prevent the buildup of pressure in the waste pipe, which can cause unpleasant smells and potential blockages. The flexible design of the connector allows for some movement and adjustment during installation, which can be helpful when connecting a toilet to a soil pipe that is not perfectly aligned. It's important to ensure that the McAlpine WC-F23RV is installed correctly to ensure a watertight seal and prevent any leaks or odors. It's recommended to follow the manufacturer's instructions carefully and seek the help of a professional plumber if needed. ・ Available in 3 lengths ・ Outlet fits 4"/110mm inside diameter of PVC-U and cast iron soil pipe ・ 97-107mm Inlet suits all pan spigots ・ Independent tests prove conclusively that there is no build-up of sediment in the flex ・ Enables easy installation of WC pans in awkward situations