15mm x 3/4" 300mm Flexible Isolating Tap Hose WRAS (Known as Flexible tap connectors / 22mm Flexible tap Connector Also Available in 15mm, 22mm, 1/2 inch, 3/4 inch, 150mm, 300mm and 500mm)

JG Speedfit Flex Tap Connectors 15mm x 1/2" x 300mm 2 Pack - Screwfix

John Guest Speedfit PEMSTC1514 15 mm x 1/2 inch BSP Straight Tap Connector