this extention was not needed, any questions just ask Experience the versatility and quality of the Grant Flue pipe extension, model K14ADJ200, an essential component for your storage tank water heater system. With an adjustable range of 275-450mm, this extension is designed to provide a reliable and secure connexion to your heating appliance, ensuring optimal performance and safety. Crafted by Grant, a trusted name in the heating industry, this adjustable flue pipe extension is a practical addition to your water heater setup. Its durable construction is engineered to withstand the demands of regular use, making it a valuable investment for your home or commercial space.