The ALS Hardware Capillary Stopend is a -grade copper plumbing fitting engineered to permanently or temporarily cap off the end of a 15mm copper pipe line. Featuring a precision-formed solder socket on the internal end, it utilizes a capillary action mechanism that draws in molten solder when heated with a plumbing torch and flux, ensuring a perfectly uniform, completely airtight, and leak-proof seal. Built to withstand high hydraulic pressures and intense thermal stress, this durable end cap is ideal for isolation points during building renovations, hot and cold residential water infrastructure, commercial installations, and demanding industrial pipeline layouts. Item Size: 15mm | Pack Size: 1 Unit