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This standard specifies requirements for materials used in vulcanized rubber seals for:
1) cold potable water supply (up to 50®C);
2) hot potable and non-potable water supply (up to 110®C);
3) drainage, sewerage and rainwater systems (continuous flow up to 45®C and intermittent flow up to 95®C)
Before conducting BS EN 681, it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.