High Quality Content by WIKIPEDIA articles! Fittings are used in pipe and plumbing systems to connect straight pipe or tubing sections, to adapt to different sizes or shapes, and to regulate fluid flow, for example. Fittings, especially noncommon types, can be expensive, and require time, materials, and tools to install, so they are a non-trivial part of piping and plumbing systems. Valves are technically fittings, but are usually discussed separately. The 'bodies' of fittings for pipe and tubing are most often of the same base material as the pipe or tubing being connected, e.g., copper, steel, polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC) ie; Flowguard or PlatinumXCELL or other plastic. However, any material that is allowed by code may be used, but must be compatible with the other materials in the system, the fluids being transported, and the temperatures and pressures inside and outside of the system. For example, brass-bodied fittings are common in otherwise copper piping and plumbing systems. Fire hazards, earthquakes, and other factors also influence fitting materials.

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