This 7/8 BSP Brass Tap Connector is designed for outside taps and standard hose fittings. It's ideal for larger garden taps, often referred to as 'farmers taps', where standard 3/4 inch BSP connectors may be too small. The 7/8 BSP refers to the outlet thread size where your hose pipe connects. The connector features a solid brass construction for durability and includes an O-ring and washer for a secure fit. It is suitable for Hozelock/Gardena style fittings. Please note that 7/8 refers to the BSP size, not the actual diameter of the fitting. If you measure approximately 22mm on your tap outlet diameter, you likely have an old 5/8 BSP thread size. This fitting is designed for tap outlets around 29mm in outer diameter, specifically for 7/8BSP thread sizes. It is not for taps that measure 7/8 inch in diameter on the outlet.