Easy installation from inside the property and reduces need for on-site cutting, allowing for use in various wall thickness types. Includes multi-lip weather seal that protects flue hole from the inside from water ingress. Features built in flue elbow with test points to fit directly and neatly onto the top of the boiler with no need for a vertical flue adaptor. UV stable and equipped with positive screw fixings for all connections. Suitable for installation by one person. Can only be used with the specific plume kit for internal flues (if required) (Code 931JL, sold separately). Compatible with Baxi Combi & System 2 ranges. Must be Fitted by a Gas Safe Registered Installer Multi-Lip Rubber Weather Seal Compatible with Combi & System 2 Ranges Must be Fitted by a Gas Safe Registered Installer Multi-Lip Rubber Weather Seal Compatible with Combi & System 2 Ranges