| Patents for E03B 7 - Water main or service pipe systems (5,081) |
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| 11/06/2001 | US6311720 Cover for protecting piping assemblies with engagement rod |
| 11/01/2001 | WO2001081804A1 Backflow preventer apparatus and method with integration of shut-off valves |
| 11/01/2001 | US20010035209 Leak-containing sheath for frost-resistant hydrant |
| 10/31/2001 | CN2457215Y Anti-stealing water device |
| 10/31/2001 | CN2457214Y Pressure stabilizer for household water |
| 10/25/2001 | US20010032808 Device for intercepting, filtering and balancing the water supplied in water treatment plants |
| 10/24/2001 | CN1318676A Centralized water meter water supply system for resident building |
| 10/23/2001 | US6305422 Undersink frozen pipe thawing system |
| 10/23/2001 | CA2165047C Backflow preventer and test cock assembly |
| 10/17/2001 | EP1012117B1 Device for sterilizing and filtering water which flows through a sanitary device |
| 10/11/2001 | WO2001075413A1 Plumbing testing devices |
| 10/10/2001 | CN1316572A Device for preventing illegal use of running water |
| 10/10/2001 | CN1316549A Technology of selective lead removed for running water pipe fitting made of copper alloy and lead removal liquid |
| 10/09/2001 | US6298872 Pilot operated water conservation valve actuator |
| 10/04/2001 | US20010025653 High level water supplying and distributing system |
| 10/04/2001 | EP1137852A1 Water control device |
| 10/03/2001 | CA2303756A1 Plumbing testing device |
| 09/26/2001 | CN2450269Y Improved constant-pressure pressure water supply apparatus |
| 09/26/2001 | CN2450268Y Domestic water purifier |
| 09/25/2001 | US6293301 Backflow prevention device enclosure having improved access |
| 09/25/2001 | US6293013 Backflow prevention assembly |
| 09/19/2001 | EP1134306A1 Selective deleading process and bath for plumbing components made of a copper alloy |
| 09/12/2001 | EP1132528A1 Parallel-fed nonstagnant integrated water distribution network for domestic water and fire sprinkler application |
| 09/12/2001 | CN2447399Y Automatic water-saving valve |
| 09/12/2001 | CN1312418A Construction process of concrete pressure pipe inspection well and exhaust well |
| 09/07/2001 | WO2001065015A1 Installation for measuring and displaying fluid volume and corresponding use for maintaining below frostline and accessible valving and metering equipment |
| 09/07/2001 | CA2401853A1 Installation for measuring and displaying fluid volume and corresponding use for maintaining below frostline and accessible valving and metering equipment |
| 09/06/2001 | US20010018926 Enhanced features for backflow prevention device enclosure |
| 09/05/2001 | CN1070566C Pure water transferring system |
| 09/04/2001 | US6284053 Selective deleading process and bath for plumbing components made of a copper alloy |
| 09/04/2001 | CA2149109C Pipe blocking technique |
| 08/29/2001 | EP1127030A1 Device for purifying fluid with photonic pulses |
| 08/22/2001 | EP1126089A2 High level water supplying and distributing system |
| 08/15/2001 | CN2443047Y Hand anti-freezing water valve |
| 08/15/2001 | CN1069548C Water purifying apparatus |
| 08/08/2001 | EP1121233A1 Tube internally coated with a cement composition and method for making same |
| 08/08/2001 | EP1121207A1 Cleaning and passivating water distribution systems |
| 08/07/2001 | US6270590 Surface treating copper-based alloy containing lead and lead salts via etching with acidic solution which is nonoxidizing, or oxidizing solution of organic acid with peroxide, then passivating in contact with water; potability |
| 08/07/2001 | CA2230541C Thawing tube guide for a culvert |
| 08/02/2001 | US20010010834 Reducing the lead content on the inner surface of the hollow component part by treatment with a hydracid aqueous reducing solution, chemically tinning the hollow parts, such as tube or joints or fittings made of copper alloy |
| 08/02/2001 | DE10003582A1 Production of a tin layer on the inner surface of hollow copper alloy parts e.g., brass comprises reducing the lead content of the inner surface by treating with an aqueous reduction solution and plating with tin |
| 08/01/2001 | EP1120477A2 Method of manufacturing a tin layer on the internal surface of copper alloy hollow elements |
| 08/01/2001 | CN2440845Y Reversal filter |
| 07/25/2001 | EP1117877A1 Apparatus for modulating fluid flow |
| 07/19/2001 | US20010008663 Pipes for conveying drinking water |
| 07/17/2001 | US6262801 Laser reference level setting device |
| 07/11/2001 | CN2438751Y Non-negative pressure pipe network pressure boost steady flow water supply equipment |
| 07/05/2001 | DE19959941A1 Expansion device for drinking water for limiting transmission of oscillation to pump comprises tank connected to water pipe so that speed of flow of water is faster when entering tank than when it is fed back into pipe |
| 07/04/2001 | EP1112127A1 Coating lead surfaces |
| 06/27/2001 | CN2436557Y Water valve replacing device operated under pressure |
| 06/21/2001 | WO2001044588A1 Backflow preventer assembly |
| 06/21/2001 | CA2394441A1 Backflow preventer assembly |
| 06/20/2001 | CN2435436Y Valve controller for controlling starting or closing of cistern water supply valve |
| 06/20/2001 | CN2435433Y Anti-freezing device for tap water end water supply |
| 06/17/2001 | CA2292814A1 Multi-purpose underground duct |
| 06/14/2001 | CA2292406A1 1 pipe reverse flow |
| 06/13/2001 | EP0708865B1 Electrically operated stop-cock for mains water supply |
| 06/07/2001 | WO2001040586A1 Backflow prevention assembly |
| 06/07/2001 | CA2393554A1 Backflow prevention assembly |
| 06/05/2001 | US6241024 Parallel-fed nonstagnant integrated water distribution network for domestic water and fire sprinkler application |
| 05/30/2001 | CN2432256Y Water supply device |
| 05/29/2001 | US6237620 Conduit for pressurizing plumbing systems and supplying zantifree plumbing systems |
| 05/29/2001 | US6237618 System and method for controlling the unwanted flow of water through a water supply line |
| 05/23/2001 | EP0842332B1 Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same |
| 05/23/2001 | CN2431313Y Pressure reducing and stabilizing orifice plate |
| 05/16/2001 | EP1099896A2 Connecting device for fluid conduits |
| 05/15/2001 | US6230745 Pipe heating device |
| 05/10/2001 | DE19953423A1 Inspection of underground pressure pipes for fresh water or gas, by lowing testing unit through connection unit placed on hydrant |
| 05/02/2001 | EP1095352A1 An apparatus for the enhancement of water quality in a subterranean pressurized water system |
| 04/25/2001 | CN1292449A Deicing method of water transmission system |
| 04/17/2001 | US6216722 Freeze-resistant hydrant |
| 04/12/2001 | DE19948210A1 Safety device for gas pipe with screw closure comprises cap which fits over closure so that tool cannot be fitted on to it to undo it |
| 04/11/2001 | CN2426368Y Fire containment ring |
| 04/04/2001 | CN2425955Y Safety water supply plug |
| 04/04/2001 | CN2425954Y Double-intelligent type pipe network pressure and flow boosted water supply equipment |
| 04/03/2001 | US6209926 Pipe coupler |
| 04/03/2001 | US6209576 Automatic fluid flow shut-off device |
| 03/29/2001 | DE19944830A1 Safety device to block off supply lines for liquid and gaseous media, preferably domestic water lines, has flow meter connected to central computer unit to establish operating states |
| 03/29/2001 | DE19939337A1 Method for preventing overflow of cistern assigned to house or house group involves conducting overflow quantity of collected rainwater in channel pipe where cisterns are pumped sequentially |
| 03/27/2001 | US6206039 Freezeless wall hydrant for delivery of hot or cold water through a single discharge conduit |
| 03/20/2001 | US6202700 Self-flushing pipe |
| 03/14/2001 | CN2423323Y Antifreezing device |
| 03/14/2001 | CN2423322Y Self-welding-type waterpipe connection |
| 03/06/2001 | US6197210 Removing the copper oxide surface layer and exposing the lead for oxidation using mineral acid, hydrogen peroxide/mineral acid or ammonium chloride/ferric chloride; rinsing; removing lead oxide with ammonium chloride/alkali metal hydroxide |
| 03/06/2001 | US6196246 Freeze-resistant plumbing system in combination with a backflow preventer |
| 03/01/2001 | DE19940375A1 Fluid armature which can be thoroughly disinfected when in the closed state to prevent growth of Legionella bacteria and which can reduce use of chlorine or other chemical disinfectants |
| 02/28/2001 | CN2421333Y Domestic automatic pipe pressurizing pump |
| 02/27/2001 | US6193879 Reject water drain line installation system and apparatus for under sink reverse osmosis filter system |
| 02/27/2001 | US6192933 Backflow prevention assembly |
| 02/21/2001 | CN2420332Y Anti-freezing device for running water |
| 02/14/2001 | CN2419273Y Drinking water device |
| 02/14/2001 | CN1284137A Method of reducing elution of lead in lead-containing copper alloy, and ware made of lead-contg copper alloy |
| 02/08/2001 | WO2001009441A1 Connection for a water meter |
| 01/30/2001 | US6178989 Safety element for a duct |
| 01/30/2001 | US6178816 Water meter |
| 01/24/2001 | EP1009888A4 Pollutant interceptor |
| 01/18/2001 | DE10033660A1 House connection to public water supply systems for improved security of such systems |
| 01/17/2001 | EP1068467A1 Device for subsequently installing a fluid meter in a pipeline |
| 01/17/2001 | EP1068405A1 Frost protection device |
| 01/16/2001 | US6173733 Enclosure for compact design backflow prevention device |