Ferrules vary in shape and material but are most commonly in the shape of a ring with beveled edges. In small sizes, the compression fitting is composed of an outer compression nut and an inner compression ring or ferrule (in the UK referred to as an "olive") that is typically made of brass or copper or steel. A major benefit is that the fittings allow easy disconnection and reconnection. Compression fittings are suited to a variety of applications, such as plumbing systems in confined spaces where copper pipe would be difficult to solder without creating a fire hazard, and extensively in hydraulic industrial applications. There are also flare fittings that do not require ferrules/olives.Ĭompression fittings are used extensively in hydraulic, gas, and water systems to enable the connection of tubing to threaded components like valves and tools. Compression fittings for attaching tubing (piping) commonly have ferrules (or olives in the UK) in them, and are sometimes referred to as flareless fittings.
In instances where two pipes made of dissimilar materials are to be joined (most commonly PVC and copper), the fittings will be made of one or more compatible materials appropriate for the connection.
A compression fitting 15 mm isolating valveĪ compression fitting is a fitting used in plumbing and electrical conduit systems to join two tubes or thin-walled pipes together.
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