Preformed copper fittings and kits are convenient, labor-saving products used to create reliable connections, directional changes, distribution points and terminations in plumbing water supply systems. Preformed copper fittings are produced to standardized dimensions and are designed for use with a variety of supply systems including PEX and CPVC. Because they are pre-formed and precision-made, they ensure consistent results, improved flow, and dependable joints. Preformed copper kits are packaged assemblies that combine fittings with related components such as brackets to reduce field fabrication and material selection time. Kits are configured for specific applications like water heater connections or fixture rough-ins and streamline installation by providing a coordinated set of parts designed to work together.