E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER drilling wells, obtaining fluids in general from wells E21B; pipe-line systems in general F17DIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. E03B1/00 E03B1/00Methods or layout of installations for water supply E03B3/00, E03B9/00 take precedence E03B1/02for public or like main supply for industrial use E03B1/04for domestic or like local supply E03B1/041Greywater supply systems E03B1/042Details thereof, e.g. valves or pumps E03B1/044Switch valves in waste pipes E03B2001/045using household water E03B2001/047using rainwater E03B1/048Systems for collecting not used fresh water E03B3/00Methods or installations for obtaining or collecting drinking water or tap water treatment of water C02F E03B3/02from rain-water E03B3/03Special vessels for collecting or storing rain-water for use in the household, e.g. water-butts containers for storage, in general, B65D E03B3/04from surface water barrages E02B7/00 E03B3/06from underground consolidating foundation soil by draining, e.g. by lowering the water level E02D3/00; subsoil filtering E21B43/02 E03B3/08Obtaining and confining water by means of wells applicable to a combination of water and other liquids or to other liquids only E21B43/00 E03B3/10by means of pit wells E03B3/11in combination with tubes, e.g. perforated, extending horizontally, or upwardly inclined, exterior to the pits E03B3/12by means of vertical pipe wells E03B3/14by means of horizontal or oblique wells E03B3/15Keeping wells in good condition, e.g. by cleaning, repairing, regeneratingMaintaining or enlarging the capacity of wells or water-bearing layers with artificial enrichment E03B3/32 ; cleaning, in general B08B E03B3/16Component parts of wells E03B3/18Well filters filters in general B01D24/00 - B01D35/00 E03B3/20of elements of special shape E03B3/22Selection of specified materials not used, documents in E03B3/20 E03B3/24formed of loose materials, e.g. gravel E03B3/26with packed filtering material E03B3/28from humid air condensing of vapours in general B01D5/00; dehumidification of air for air-conditioning F24F3/14 E03B3/30from snow or ice E03B3/32with artificial enrichment, e.g. by adding water from a pond or a river consolidating foundation soil by draining, e.g. by lowering the water level E02D3/00 E03B3/34of underground water E03B3/36of surface water E03B3/38Curbs for springs E03B3/40Other devices for confining, e.g. trenches, drainage E03B5/00Use of pumping plants or installationsLayouts thereof pumps; pumping plants or installations per se F04 E03B5/02arranged in buildings E03B5/025with surface tanks E03B5/04arranged in wells E03B5/045with surface tanks E03B5/06Special equipment , e.g. well seals and connections for well casings or the like E03B7/00Water main or service pipe systems pipes or tubes in general F16L E03B7/003Arrangement for testing of watertightness of water supply conduits E03B7/006Arrangements or methods for cleaning or refurbishing water conduits E03B7/02Public or like main pipe systems E03B7/04Domestic or like local pipe systems domestic plumbing E03C1/02 E03B7/045diverting initially cold water in warm water supply E03B7/07Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems devices per se, see the relevant classes for these devices E03B7/071Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off E03B7/072Arrangement of flowmeters E03B7/074Arrangement of water treatment devices E03B7/075Arrangement of devices for control of pressure or flow rate E03B7/077Arrangement of backflow preventing devices E03B7/078Combined units with different devices; Arrangement of different devices with respect to each other E03B7/08Arrangement of draining devices, e.g. manual shut-off valvesdraining devices in general F16K, F16L E03B7/09Component parts or accessories tools for cleaning pipes B08B9/02; devices for preventing contamination of drinking water pipes for domestic use E03C1/10; devices for preventing damage in case of bursts of pipes F16L; heating or cooling of pipes or pipe systems F16L53/00 E03B7/095Component holders or housings, e.g. boundary boxes E03B7/10Devices preventing bursting of pipes by freezing devices preventing bursting of pipes in general F16L55/00 E03B7/12by preventing freezing E03B7/14Devices for thawing frozen pipes E03B9/00Methods or installations for drawing-off water domestic water-drawing devices E03C; taps or valves per se F16K E03B9/02HydrantsArrangements of valves thereinKeys for hydrants E03B2009/022Hydrants with a tubular valve seat E03B9/025Taps specially designed for outdoor use, e.g. wall hydrants, sill cocks E03B9/027with features preventing frost damage E03B9/04Column hydrants E03B9/06Covers E03B9/08Underground hydrants E03B9/10Protective plates or covers E03B9/12Stand-pipes E03B9/14Draining devices for hydrants E03B9/16Devices for retaining foreign matter, e.g. sand E03B9/18Cleaning tools for hydrants E03B9/20Pillar fountains or like apparatus for dispensing drinking water E03B11/00Arrangements or adaptations of tanks for water supply water-butts E03B3/03; storage aspects B65D, B65G, F17B, F17C; foundations E02D27/38; construction or assembling of bulk storage containers employing civil engineering techniques E04H7/00; tower aspects E04H12/00 E03B2011/005Tanks with two or more separate compartments divided by, e.g. a flexible membrane E03B11/02for domestic or like local water supply E03B11/04without air regulators , i.e. without air inlet or outlet valves; water tanks provided with flexible walls E03B11/06with air regulators air receivers for water conduits F16L55/04; pressure control devices for fluids G05D E03B11/08Air regulators E03B11/10for public or like main water supply E03B11/12of high-level tanks E03B11/14of underground tanks E03B11/16Adaptations of devices for putting pumping plants in and out of operation, e.g. automatic control devices not used, documents in F04