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Single socket reducer 82/50mm with one ring seal socket and one plain end spigot. Conforms to BS 4514:1983 A highly-secured and long-lasting installation Easy to use Fits into a ring seal socket to provide an access point Incorporated captive seal technology ensures no leakages from the plug after installation Designed in with a unique keyway to ensure the correct fall is achieved The seals will not dislodge during fitting