| E | SK | FIXED CONSTRUCTIONS |
| E03 | KL | WATER SUPPLY; SEWERAGE |
| E03C | UKL | DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER (not connected to either water-supply main or to waste pipe A47K; devices of the kind used in the ground E03B , E03F); SINKS |
| E03C 1/00 | HGR | Domestic plumbing installations for fresh water or waste water; Sinks |
| E03C 1/01 | UGR1 | | . | for combinations of baths, showers, sinks, wash-basins, closets, urinals, or the like |
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| E03C 1/02 | UGR1 | | . | Plumbing installations for fresh water |
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| E03C 1/04 | UGR2 | | . . | Water-basin installations specially adapted to wash-basins or baths (valves, faucets, mixing valves, taps F16K) |
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| E03C 1/042 | UGR3 | | . . . | Arrangements on taps for wash-basins or baths for connecting to the wall |
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| E03C 1/044 | UGR3 | | . . . | having a heating or cooling apparatus in the supply line (water heaters, e.g. with continuous flow, F24H) |
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| E03C 1/046 | UGR3 | | . . . | Adding soap, disinfectant, or the like, in the supply line (preventing contamination of drinking-water pipes E03C 1/10) |
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| E03C 1/048 | UGR3 | | . . . | supplying water through two or more openings around or along one side of the water-basin |
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| E03C 1/05 | UGR2 | | . . | Arrangements of devices on wash-basins, baths, sinks, or the like, for remote control of taps (remote control of taps or the like, per se F16K) |
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| E03C 1/06 | UGR2 | | . . | Devices for suspending or supporting the supply pipe or supply hose of a shower-bath |
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| E03C 1/08 | UGR2 | | . . | Jet regulators, e.g. anti-splash devices |
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| E03C 1/084 | UGR3 | | . . . | Jet regulators with aerating means |
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| E03C 1/086 | UGR3 | | . . . | Jet regulators or jet guides, easily mountable on the outlet of taps |
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| E03C 1/10 | UGR2 | | . . | Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves (vacuum-breakers in general F16K , F16L) |
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| E03C 1/12 | UGR1 | | . | Plumbing installations for waste water; Basins or fountains connected thereto (drainage devices in floors E03F 5/04); Sinks |
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| E03C 1/122 | UGR2 | | . . | Pipe-line systems for waste water in buildings (pipe-line systems in general F17D) |
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| E03C 1/126 | UGR2 | | . . | Installations for disinfecting or deodorising waste-water plumbing installations |
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| E03C 1/14 | UGR2 | | . . | Wash-basins connected to the waste pipe |
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| E03C 1/16 | UGR2 | | . . | Wash-fountains connected to the waste pipe |
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| E03C 1/18 | UGR2 | | . . | Sinks, whether or not connected to the waste-pipe |
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| E03C 1/181 | UGR3 | | . . . | Anti-splash devices in sinks (jet regulators E03C 1/08) |
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| E03C 1/182 | UGR3 | | . . . | connected to the waste pipe |
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| E03C 1/184 | UGR4 | | . . . . | adapted for attachment of washing machines or heating or cooling devices (washing machines for attachment D06F 7/00) |
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| E03C 1/186 | UGR3 | | . . . | Separate partition walls, lids, protecting borders, or the like, for sinks |
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| E03C 1/20 | UGR2 | | . . | Connecting baths or bidets to the waste pipe |
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| E03C 1/22 | UGR2 | | . . | Outlet devices mounted in basins, baths, or sinks (stoppers A47K 1/14) |
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| E03C 1/23 | UGR3 | | . . . | with mechanical closure mechanisms |
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| E03C 1/232 | UGR4 | | . . . . | combined with overflow devices (overflow devices for basins or baths per se E03C 1/24) |
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| E03C 1/24 | UGR2 | | . . | Overflow devices for basins or baths (E03C 1/232 takes precedence) |
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| E03C 1/242 | UGR3 | | . . . | automatically actuating supply or draining valves |
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| E03C 1/244 | UGR3 | | . . . | Separate devices to be placed on the outlet opening |
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| E03C 1/26 | UGR2 | | . . | Object-catching inserts or similar devices for outlets (E03C 1/28 takes precedence) |
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| E03C 1/262 | UGR3 | | . . . | combined with outlet stoppers |
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| E03C 1/264 | UGR3 | | . . . | Separate sieves or similar object-catching inserts |
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| E03C 1/266 | UGR3 | | . . . | Arrangements or adaptations of disintegrating apparatus in waste pipes, outlets to waste pipes, or the like (disintegrating apparatus per se B02C) |
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| E03C 1/28 | UGR2 | |
| E03C 1/282 | UGR3 | | . . . | combined with additional object-catching devices |
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| E03C 1/284 | UGR3 | | . . . | having U-shaped trap |
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| E03C 1/286 | UGR4 | | . . . . | having hand-operated valves against return of waste water |
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| E03C 1/288 | UGR4 | | . . . . | having non-return valves against return of waste water (E03C 1/286 takes precedence) |
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| E03C 1/29 | UGR3 | | . . . | having housing containing dividing wall, e.g. tubular |
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| E03C 1/292 | UGR4 | | . . . . | having elastic housing |
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| E03C 1/294 | UGR3 | | . . . | with provisions against loss of water lock |
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| E03C 1/295 | UGR4 | | . . . . | using air-supply valves |
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| E03C 1/296 | UGR4 | | . . . . | using water-supply valves |
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| E03C 1/298 | UGR3 | | . . . | consisting only of non-return valve |
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| E03C 1/30 | UGR2 | | . . | Devices to facilitate removing of obstructions in waste pipes or sinks |
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| E03C 1/302 | UGR3 | | . . . | using devices moved through the pipes |
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| E03C 1/304 | UGR3 | | . . . | using fluid under pressure |
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| E03C 1/306 | UGR4 | | . . . . | by means of a tube connected to the water mains |
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| E03C 1/308 | UGR4 | | . . . . | by means of a pumping device |
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| E03C 1/32 | UGR2 | | . . | Holders or supports for basins |
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| E03C 1/322 | UGR3 | | . . . | connected to the wall only |
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| E03C 1/324 | UGR4 | |
| E03C 1/326 | UGR3 | | . . . | resting on the floor |
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| E03C 1/328 | UGR4 | |
| E03C 1/33 | UGR3 | | . . . | Fastening sinks or basins in an apertured support |
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