Multipurpose copper pipe cap that also doubles as a pipe extension adapter, enabling flexible configurations when upgrading bathroom fixtures, commercial boilers, or industrial piping layouts with lasting reliability. Corrosionresistant copper construction delivers durable, leakproof performance in pressure plumbing systems, suitable for both residential and industrial applications. Precisely engineered internal threads with smooth finishes create reliable seals on externalthreaded pipes, eliminating water leakage and enabling toolless installation for hassle maintenance. A dependable protective solution for exposed pipe ends in water supply networks, irrigation setups, and equipment maintenance projects; essential for plumbers, HVAC technicians, and DIY homeowners. Key attributes: function as a cap and adapter, compatible with externalthreaded pipes, corrosionresistant copper material, pressure performance, and toolless installation for quick, reliable service. Use scenarios: Residential: upgrade bathroom fixtures or extend piping in a home remodel without complex threading or sealing methods. Irrigation: cap or extend irrigation lines, protecting exposed ends in garden or landscape systems. Industrial/HVAC: protect exposed ends on water supply, boiler, or equipment piping during maintenance in commercial settings.