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DK177342B1 - Water drainage unit and use of the same - Google Patents

Water drainage unit and use of the same Download PDF

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Publication number
DK177342B1
DK177342B1 DKPA201100706A DKPA201100706A DK177342B1 DK 177342 B1 DK177342 B1 DK 177342B1 DK PA201100706 A DKPA201100706 A DK PA201100706A DK PA201100706 A DKPA201100706 A DK PA201100706A DK 177342 B1 DK177342 B1 DK 177342B1
Authority
DK
Denmark
Prior art keywords
pump
water
sewer line
sewer
drainage unit
Prior art date
Application number
DKPA201100706A
Other languages
Danish (da)
Inventor
Poul HANSEN
Original Assignee
Pah Bygge & Anlaeg V Poul Anders Hansen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=47115099&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DK177342(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pah Bygge & Anlaeg V Poul Anders Hansen filed Critical Pah Bygge & Anlaeg V Poul Anders Hansen
Priority to DKPA201100706A priority Critical patent/DK177342B1/en
Priority to PCT/DK2012/000101 priority patent/WO2013037372A1/en
Priority to EP20120780406 priority patent/EP2756138A1/en
Application granted granted Critical
Publication of DK177342B1 publication Critical patent/DK177342B1/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/22Adaptations of pumping plants for lifting sewage
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/101Dedicated additional structures, interposed or parallel to the sewer system
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices
    • E03F5/106Passive flow control devices, i.e. not moving during flow regulation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/30Flood prevention; Flood or storm water management, e.g. using flood barriers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20Controlling water pollution; Waste water treatment

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Sewage (AREA)

Abstract

En vandafledningsenhed (1) til afledning af fækalieholdigt og/eller ikke fækalieholdigt vand fra en bygning, er udformet med en pumpesump (5), der er placeret under en kloakledning (6,6A,7), som er forsynet med et overløb (7). Kloakledningen er tilsluttet et højvandslukke (11). Nede i pumpesumpen (5) er der anordnet en pumpe (8), som i afhægighed af mængden af kloakvand i pumpesumpen, er indrettet til at pumpe spildevand, via en pumpekloakledning (9), nedstrøms i kloakledningen efter højvandslukket (11). På denne måde sikres at vandafledningsenheden (1) kun sætter pumpen i drift under ekstreme forhold, såsom ved skybrud, hvor højvandslukket er aktivt, og altså lukker for både afledning og tilledning af spildevand fra eksempelvis en bygnings kælder. En særlig interessant anvendelse af vandafledningsenheden ifølge opfindelsen, er i forbindelse med afledning af spildevand fra et parcelhus.A water drainage unit (1) for draining faecal and / or non-faecal water from a building is provided with a pump sump (5) located under a sewer (6.6A, 7) provided with an overflow (7). ). The sewer line is connected to a high water outlet (11). Downstream of the pump sump (5), a pump (8) is arranged which, depending on the amount of sewage in the pump sump, is arranged to pump waste water, via a pump sewer line (9), downstream of the sewer line after the high water shut-off (11). In this way, it is ensured that the water drainage unit (1) only operates the pump under extreme conditions, such as in case of cloudburst, where the high-water extinguisher is active, and thus closes for both drainage and supply of wastewater from, for example, a building's basement. A particularly interesting use of the water drainage unit according to the invention is in connection with the discharge of sewage from a detached house.

Description

DK 177342 B1DK 177342 B1

Opfindelsen angår en vandafledningsenhed, der omfatter et hus, en pumpesump, en kloakledning, hvor kloakledningen er tilsluttet et højvandslukke, og hvor kloakledningen er ført gennem huset, og hvor vandafledningsenheden er indrettet til at bortlede spildevand, der er 5 fækalieholdigt og/eller ikke-fækalieholdigt, og hvor der i pumpesumpen er anbragt en pumpe, som er indrettet til at pumpe spildevandet fra pumpesumpen, via en til pumpen tilkoblet pumpekloakledning, der er tilkoblet nedstrøms i kloakledningen.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a water drainage unit comprising a housing, a pump sump, a sewer line to which the sewer line is connected to a high-water drain, and wherein the sewer line is passed through the housing and wherein the water drainage unit is adapted to discharge wastewater which is fecal and / or non-sewer. fecal-containing, and where a pump is arranged in the pump sump, which is arranged to pump the waste water from the pump sump, via a pump sewer line connected to the pump, which is connected downstream of the sewer line.

ίο Som det er velkendt, er der i nyere tid sket klimaforandringer, som flere steder på kloden har betydet ekstreme vejrsituationer, der bl. a giver sig udtryk i langvarige tørkeperioder og kolossale skybrud.ίο As is well known, there have been recent climate changes, which have resulted in extreme weather situations in several places on the planet. a manifests itself in prolonged periods of drought and colossal cloudbursts.

I forbindelse med skybrud, hvor vandmængder falder i enorme mængder på ganske kort tid, er det et problem, at de kloaksystemer som er anlagt over en 15 periode på måske 100 år, ikke er i stand til at optage disse enorme vandmængder. Dette medfører risiko for tilbageløb og opstuvning af vand, idet et højvandslukke, når det lukker, udover at forhindre vand i at komme ind i en kælder, også forhindrer vand i at blive bortledt fra kælderen.In the case of cloudbursts, where water volumes fall in huge quantities in a very short time, it is a problem that the sewer systems that have been built over a 15 period of maybe 100 years are not able to absorb these huge volumes of water. This entails the risk of backflow and stowage of water, as a high-water closure when it closes, in addition to preventing water from entering a basement, also prevents water from being drained from the basement.

20 En vandafledningsenhed af den i krav l's indledning angivne art, kendes fra US patent nr. 4.997.312.A water drain unit of the kind set forth in the preamble of claim 1 is known from U.S. Patent No. 4,997,312.

Ved denne kendte vandafledningsenhed er der anvendt et antal komponenter, herunder en ventil, der er tilsluttet kloakrøret. Når en flyder detekterer, at der er større vandmængder end kloakledningen kan bortlede, aktiverer flyderen 25 vandafledningsenheden, således at vand kan tilledes en tank.A number of components, including a valve connected to the sewer pipe, have been used in this known water drainage unit. When a float detects that there is greater volume of water than the sewer line can drain, the float 25 activates the water drain unit so that water can be fed to a tank.

Det er på denne baggrund et formål med opfindelsen at tilvejebringe et vandafledningssystem, der er mere enkelt opbygget, og umiddelbart kan anvendes i forbindelse med eksisterende kloakledninger samt nybyggede 30 kloakledninger.It is, therefore, an object of the invention to provide a water drainage system which is more simply constructed and can be used immediately in connection with existing sewer lines as well as newly built sewer lines.

Opfindelsens formål tilgodeses ved et vandafledningssystem af det i krav l's angivne art, som er karakteristisk ved, at kloakledningen inde i huset er udformet med et overløb, der består af en udskæring i kloakledningen, og er placeret over pumpesumpen.The object of the invention is met by a water drainage system of the kind specified in claim 1, characterized in that the sewer pipe inside the housing is formed with an overflow consisting of a cut in the sewer pipe and is located above the pump sump.

DK 177342 B1 2DK 177342 B1 2

Det er således ikke nødvendigt at tilslutte nogle komponenter til kloakledningen, idet det er tilstrækkeligt at udføre en udskæring i selve kloakledningen.Thus, it is not necessary to connect some components to the sewer line, as it is sufficient to make a cut in the sewer line itself.

5 Det er hensigtsmæssigt som angivet i krav 2, at udskæringen har halvcirkelformet tværsnit.It is convenient as stated in claim 2 that the cut has a semi-circular cross section.

Til stabil drift af pumpen, er det fordelagtigt, hvis som angivet i krav 3, at der i pumpesumpen er anordnet to væskeniveaufølere, der er tilsluttet et ίο kontrolkredsløb, som i afhængighed af signaler fra følerne sender styresignaler til pumpen for aktivering eller deaktivering af denne.For stable operation of the pump, it is advantageous if, as stated in claim 3, there are provided in the pump sump two liquid level sensors connected to a control circuit which, in response to signals from the sensors, send control signals to the pump for activating or deactivating the pump. .

På denne måde forhindres at pumpen står og tænder og slukker uafbrudt, idet der er et niveau af vandet hvor pumpen aktiveres, og et andet lavere niveau af vandet, hvor pumpen deaktiveres.This prevents the pump from standing and switching on and off continuously, there being one level of water at which the pump is activated and another lower level of water at which the pump is deactivated.

1515

En hensigtsmæssig udførelsesform for opfindelsen, er som angivet i krav 4, at der i pumpekloakledningen er monteret en kontraventil.An appropriate embodiment of the invention, as stated in claim 4, is that a check valve is mounted in the pump sewer line.

Som nævnt angår opfindelsen også en anvendelse.As mentioned, the invention also relates to an application.

20 Denne anvendelse er nærmere angivet i krav 5.This use is further specified in claim 5.

Opfindelsen skal herefter nærmere forklares under henvisning til tegningens eneste figur.The invention will then be explained in more detail with reference to the sole figure of the drawing.

25 På denne figur er med 1 i sin helhed betegnet en vandafledningsenhed, ifølge opfindelsen.In this figure, 1 in its entirety is designated a water drainage unit, according to the invention.

Vandafledningsenheden består af et hus 3, der øverst er lukket med et dæksel 18, som vist her, ligger i niveau med et terræn 4. Til vandafledningsenheden er der indført en kloakledning 6.The water drainage unit consists of a housing 3, which is closed at the top with a cover 18, as shown here, is level with a terrain 4. A drainage pipe 6 has been introduced to the water drainage unit.

30 Denne kloakledning kan stamme fra en bygning, såsom en villa eller et parcelhus, og er indrettet til at fremføre spildevand, der kan være fækalieholdigt eller ikke fækalieholdigt, dvs. vand fra vaske, toiletter, regnvand, etc.This sewer line may originate from a building, such as a villa or detached house, and is adapted to convey wastewater which may be fecal or non-fecal, ie. water from sinks, toilets, rainwater, etc.

Kloakledningen er via et overløb/gennemløb 7 videreført ud af huset 3 via 35 kloakledningen, som vist ved 6A.The sewer line is passed out of the housing 3 via an overflow / passage 7 via the sewer line, as shown at 6A.

DK 177342 B1 3DK 177342 B1 3

Overløbet 7 kan bestå af en simpel udskæring af kloakledningen 6,6A, f. eks med halvcirkelformet tværsnit.The overflow 7 may consist of a simple cut of the sewer line 6.6A, for example with a semicircular cross section.

Under kloakledningen er der tilvejebragt en pumpesump, som er beregnet til, jfr. senere, at optage vand via overløbet 7.Under the sewer line a pump sump is provided, cf. later, to absorb water via the overflow 7.

5 Inde i pumpesumpen 5 er der anbragt en pumpe 8, som er indrettet til at pumpe spildevand fra pumpesumpen 5 gennem en pumpekloakledning 9, der er tilsluttet nedstrøms til kloakledningen 6A.5 Inside the pump sump 5 is a pump 8 arranged to pump waste water from the pump sump 5 through a pump sewer line 9 connected downstream to the sewer line 6A.

Som det endvidere ses er der i pumpekloakledningen anordnet en kontraventil 10, som på kendt vis forhindrer tilbageløb af kloakvand i pumpekloakledningen 10 9.As can also be seen, a non-return valve 10 is provided in the pump sewer line which prevents the flow of sewage into the pump sewer line 10 9 in a known manner.

Yderligere er der vist en kobling 19 i pumpekloakledningen, som anvendes i forbindelse med en her ikke nærmere forklaret servicering af pumpen 8.In addition, a coupling 19 is shown in the pump sewer line which is used in connection with a pump 8 which is not explained here.

Nede i pumpesumpen 5 er der anordnet to væskeniveaufølere 12, 13, som er indrettet til, som det forklares senere, at sende styresignaler 15, 16 til en 15 styreenhed 14, som på baggrund af styresignalerne kan aktivere/deaktivere pumpen 8 ved hjælp af et styresignal 17, der overføres fra styreenheden 14.At the bottom of the pump sump 5 are arranged two liquid level sensors 12, 13 which, as will be explained later, send control signals 15, 16 to a control unit 14 which, on the basis of the control signals, can activate / deactivate the pump 8 by means of a control signal 17 transmitted from the control unit 14.

Huset 3 er forsynet med et dæksel 18, der eksempelvis kan flugte med et terræn 4.The housing 3 is provided with a cover 18 which, for example, can flush with a terrain 4.

Endeligt er der inde i huset 11 monteret et kendt højvandslukke, som under 20 eksempelvis skybrud, forhindrer at spildevand fra det offentlige kloaknet ledes ind i huset 3. Et sådant højvandslukke forhindrer også, at regnvand og spildevand kan afledes til det offentlige kloaknet.Finally, inside a housing 11 a well-known high-water drain is mounted, which during 20, for example, cloud breaks, prevents wastewater from the public sewer network from being fed into the housing 3. Such a high-water drain also prevents rainwater and wastewater from being diverted to the public sewer network.

Hele vandafledningsenheden kan placeres inden i eller udenfor en bygning, hvad der i det givne tilfælde er mest hensigtsmæssigt.The entire water drainage unit can be located inside or outside a building, which is most appropriate in the given case.

2525

Herefter skal det forklares, hvorledes vandafledningsenheden fungerer.Next, it must be explained how the water drainage unit works.

Når der transporteres spildevand fra en bygning gennem kloakledningen 6, vil spildevandet under normale omstændigheder passere gennem overløbet 7, og videre gennem kloakledningen 6A, som er forbundet til et offentligt kloaknet.When wastewater is transported from a building through the sewer line 6, the wastewater will normally pass through the overflow 7, and further through the sewer line 6A, which is connected to a public sewer network.

30 Hvis der nu under ekstreme vejrforhold, såsom skybrud, er tilbageløb og opstuvning således at højvandslukket lukker, så vil regnvandet og eventuelt spildevand løbe over i overløbet 7 og ned i pumpesumpen 5, hvor der vil ske en ophobning af vand i pumpesumpen 5.30 If, in extreme weather conditions, such as cloudbursts, there is reflux and stowage so that the high tide shuts down, then the rainwater and any wastewater will flow into the overflow 7 and into the pump sump 5, where water will accumulate in the pump sump 5.

Når der i pumpesumpen 5 nås et fyldningsniveau svarende til 35 væskeniveaufølerens 12 niveau, da vil pumpen via styresignalerne 16, 17 DK 177342 B1 4 blive aktiveret, og dermed pumpe vand fra pumpesumpen 5 nedstrøms i kloakledningen 6A, via pumpekloakledningen 9.When in the pump sump 5 a filling level corresponding to the level of the liquid level sensor 12 is reached, the pump will be activated via the control signals 16, 17, thereby pumping water from the pump sump 5 downstream into the sewer line 6A, via the pump sewer line 9.

Når skybruddet er overstået, vil pumpeenheden fortsætte med at pumpe indtil væskeniveauføleren 12 detekterer, at der ikke mere er påvirkning fra 5 spildevandet, idet styresignalet 15 sendes til styreenheden 14, som via styresignalet 17 afbryder pumpen 8. Efter skybruddet vil højvandslukket åbne og gennemløb gennem kloakken genoptages på normal vis.When the cloudburst is over, the pump unit will continue to pump until the liquid level sensor 12 detects that there is no more influence from the waste water, the control signal 15 being sent to the control unit 14, which via the control signal 17 switches off the pump 8. After the cloud break, the high-water shut-off will open and pass through. the sewer is resumed in the normal way.

Som det vil forstås starter pumpen kun, når pumpesumpen 5 fyldes til ίο væskeniveaufølerens 12 niveau, hvilket kun sker under ekstreme vejrforhold.As will be understood, the pump only starts when the pump sump 5 fills to the level of the liquid level sensor 12, which occurs only in extreme weather conditions.

Dette betyder først og fremmest, at unødvendig drift af pumpen 8 med slid og unødvendigt energiforbrug helt elimineres.First and foremost, this means that unnecessary operation of the pump 8 with wear and unnecessary energy consumption is completely eliminated.

Claims (5)

1. Vandafledningsenhed (1), der omfatter et hus (3), en pumpesump (5), en kloakledning (6,6A,7), hvor kloakledningen er tilsluttet et 5 højvandslukke (11), og hvor kloakledningen er ført gennem huset, og hvor vandafledningsenheden er indrettet til at bortlede spildevand, der er fækalieholdigt og/eller ikke-fækalieholdigt, og hvor der i pumpesumpen er anbragt en pumpe (8), som er indrettet til at pumpe spildevandet fra pumpesumpen, via en til pumpen tilkoblet ίο pumpekloakledning (9), der er tilkoblet nedstrøms i kloakledningen (6A) kendetegnet ved, at kloakledningen (6,6A,7) inde i huset er udformet med et overløb (7), der består af en udskæring i kloakledningen, og er placeret over pumpesumpen (5).A water drain unit (1) comprising a housing (3), a pump sump (5), a sewer line (6.6A, 7), wherein the sewer line is connected to a high-water shut-off (11) and the sewer line is passed through the housing, and wherein the water drain unit is adapted to discharge fecal and / or non-faecal containing wastewater and wherein a pump (8) is arranged in the pump sump adapted to pump the wastewater from the pump sump via a pump sewer connected to the pump. (9) connected downstream of the sewer line (6A), characterized in that the sewer line (6,6A, 7) is formed inside the housing with an overflow (7) consisting of a cut in the sewer line and located above the pump sump. (5). 2. Vandafledningsenhed ifølge kravene 1, kendetegnet ved, at udskæringen har halvcirkelformet tværsnit.Water drainage unit according to Claim 1, characterized in that the cut has a semi-circular cross section. 3. Vandafledningsenhed ifølge krav 1 - 2, kendetegnet ved, at der i pumpesumpen er anordnet to væskeniveaufølere (12,13) der er 20 tilsluttet et kontrolkredsløb (14), som i afhægighed af signaler fra følerne sender styresignaler (15,16) til pumpen (8) for aktivering eller deaktivering af denne.Water drainage unit according to claims 1-2, characterized in that two liquid level sensors (12,13) are provided in the pump sump (20) which are connected to a control circuit (14) which sends control signals (15,16) in response to signals from the sensors. the pump (8) for activating or deactivating it. 4. Vandafledningsenhed ifølge krav 1-3, kendetegnet ved, at der i 25 pumpekloakledningen (9) er monteret en kontraventil (10).Water drainage unit according to claims 1-3, characterized in that a non-return valve (10) is mounted in the pump sewer line (9). 5. Anvendelse af en vandafledningsenhed ifølge kravene 1 - 4 for afledning af spildevand fra en bygning, såsom et parcelhus.Use of a water drainage unit according to claims 1-4 for draining sewage from a building, such as a detached house.
DKPA201100706A 2011-09-16 2011-09-16 Water drainage unit and use of the same DK177342B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DKPA201100706A DK177342B1 (en) 2011-09-16 2011-09-16 Water drainage unit and use of the same
PCT/DK2012/000101 WO2013037372A1 (en) 2011-09-16 2012-09-13 Drainage unit and use thereof
EP20120780406 EP2756138A1 (en) 2011-09-16 2012-09-13 Drainage unit and use thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201100706A DK177342B1 (en) 2011-09-16 2011-09-16 Water drainage unit and use of the same
DK201100706 2011-09-16

Publications (1)

Publication Number Publication Date
DK177342B1 true DK177342B1 (en) 2013-01-28

Family

ID=47115099

Family Applications (1)

Application Number Title Priority Date Filing Date
DKPA201100706A DK177342B1 (en) 2011-09-16 2011-09-16 Water drainage unit and use of the same

Country Status (3)

Country Link
EP (1) EP2756138A1 (en)
DK (1) DK177342B1 (en)
WO (1) WO2013037372A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781666A1 (en) * 2013-03-19 2014-09-24 DBE Lyngholm Aps A system for preventing backflow of wastewater

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US9315982B2 (en) * 2013-03-15 2016-04-19 John Matthew Weed Septic system with overflow discharge system
SE540651C2 (en) * 2014-09-05 2018-10-09 Tekniska Verken I Linkoeping Ab Pumping station, sewerage system and method for sealing wastewater
FR3026757B1 (en) * 2014-10-07 2019-06-14 Technirel WATER LIFTING STATION
EP3051035A1 (en) * 2015-01-30 2016-08-03 Luri.watersystems.Gmbh Assembly for receiving a liquid conveyed in a sewage pipe
AT525154A1 (en) * 2021-05-28 2022-12-15 Ofner Ing Hubert Device for preventing water from flowing back from a sewer pipe into a sewage pipe of a building

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US2421066A (en) 1944-09-29 1947-05-27 Elra F Howe Flood control system
US2549204A (en) * 1945-09-11 1951-04-17 Oscar W Kaddatz Drain control device
US2739662A (en) * 1953-03-23 1956-03-27 Sofia Antonio Backwater sewer trap
US3020922A (en) 1957-12-09 1962-02-13 Levi I Oury Flood control unit
DE3310314A1 (en) * 1983-03-22 1984-09-27 Fa. Helmuth Dallmer, 5760 Arnsberg Inspection shaft for a building waste water pipe
US4997312A (en) 1988-07-05 1991-03-05 Patrick Regan Water backup preventing system and monitoring system therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781666A1 (en) * 2013-03-19 2014-09-24 DBE Lyngholm Aps A system for preventing backflow of wastewater

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Publication number Publication date
EP2756138A1 (en) 2014-07-23
WO2013037372A1 (en) 2013-03-21

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