The Copperman Copcal Capillary CxFI Coupler is a -grade copper plumbing fitting engineered to establish a permanent, secure straight inline connection while transitioning a soldered copper pipeline directly to a male threaded fixture. It features a precision-formed capillary socket (C) on one end for a smooth solder joint onto a 15mm copper pipe, alongside a heavy-duty Female Iron BSP thread (FI) on the opposing end for securing threaded fittings, valves, or tap connections. Built to withstand high hydraulic pressures and intense thermal stress, this durable straight female adapter coupling is ideal for hot and cold residential water infrastructure, commercial installations, and demanding industrial pipeline layouts. Item Size: 15mm | Pack Size: 1 Unit