Compression Olive
Also known as: olive, compression ring, ferrule
A soft brass or copper ring inside a compression fitting. When the fitting nut is tightened, the olive compresses around the pipe to create a permanent watertight seal — no soldering needed.
Inside every compression fitting on copper or plastic pipe. Hidden under the compression nut.
Small ring, 15 mm or 22 mm (matching the pipe diameter), brass or copper coloured. Barrel-shaped in cross-section.
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Always turn off the water supply before replacing any part. If in doubt, consult a qualified plumber. Gas components must only be worked on by a Gas Safe registered engineer. Unvented (pressurised) hot water systems must be worked on by a G3-qualified engineer. Prices shown are indicative — check retailers for current pricing.