AA, Unrestricted discharge above spillover level, Break cisterns, storage tanks, AB, Air gap with weir overflow, High-risk cisterns (e.g., dental surgeries), AD, Air gap with injector (jump jet), Commercial dishwashers, clothes washers, AG, Air gap under float-operated valve, Domestic cold-water storage cisterns, AUK1, Air gap with interposed cistern, WC cisterns, AUK2, Air gap for taps discharging over sanitary appliances, Basins, baths, bidets, AUK3, Air gap for kitchen sinks and similar, Kitchen sinks, cleaner’s sinks, DC Pipe Interrupter, Creates air inlet to break siphonic action, Used for Urinals

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