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LIST OF APPROVEDPRODUCTS FOR USE INPUBLIC WATER SUPPLY INTHE UNITED KINGDOMAll approved products must be used in accordance with the specific conditions of approval, listedagainst the product names in Parts A-E. In addition, the following general conditions of approvalapply to all approved products:1. That use is in accordance with an Instructions for Use document. Approval holders mustprovide drinking water suppliers with copies of the Instructions for Use Document that wasconsidered by the Drinking Water Inspectorate (DWI) when approval was recommended.2. That the approval of the Authorities is obtained on condition that there shall be: no change in the formulation of the approved product, including change in the sourceor identity of raw materials no change in the manufacturing process, including location of manufacture no change in designation of the approved product no change in name or ownership of the organisation holding the approval3. That the producer shall ensure that the product is tested for conformity with its formulation,and the source or identity of its raw materials, at such intervals and by such persons, asmay be determined by the Authorities. The results of such testing shall be sent to theAuthorities.4. If there is suspicion that any of the above is not being followed or has been changed thennotify DWI Regulation 31 team who will investigate (reg31.enquiries@defra.gov.uk)5. That the approval is still validUncontrolled if printedPage 1 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomContentsPart AChemicals and Filter Media . 4A.1Flocculants and Coagulants . 4A.1.1Products based on tannin . 4A.1.3Products based on iron . 4A.2Adsorbents . 4A.3Ion Exchange Resins Systems . 4A.3.1Ion exchange resins . 4A.3.2Ion exchange resin based processes . 6A.5Disinfection or Cleaning Agents of Membranes . 6A.6Disinfectants for Emergency Use . 10A.7Products Based on Traditional Chemicals . 10A.7.1Traditional Chemicals . 10A.7.2On-site electrolytic generation of chlorine . 11A.7.3On-site generation of chlorine dioxide . 14A.9Other Chemicals . 14A.10Filter Media. 17Part BProducts for Conveyance of Water . 18B.1Pipes . 18B.1.1Polyethylene (PE) pipes . 18B.1.2Polyethylene Barrier pipes . 23B.1.3Polyvinylchloride (PVC) pipes . 24B.1.4Acrylonitrile-butadiene-styrene copolymer (ABS) . 25B.1.5Polyethylene terephthalate (PET) . 26B.1.7Cement mortar lined pipes . 26B.1.7.1Cement mortar lined pipes without seal coat . 26B.1.7.2Cement mortar lined pipes with seal coat . 27B.1.8Pipes coated with factory applied nylon resins . 28B.1.9Pipes coated with factory applied epoxy resin . 28B.1.10Stainless steel pipes . 30B.1.11Coated pipes suitable for total immersion in water . 34B.1.12Pipes coated with a factory applied polyolefin . 35B.2Well Casings, Screens and Rising Mains . 35B.3Products for Conveyance of Water -Emergency Use . 37B.3.1Hoses . 37B.3.2Bowsers/tanks . 38B.3.3Liner bags . 39Part CLining, Coatings, Sealant and Repair Materials . 40C.1In-situ Installed (tubular) pipe linings . 40C.2In-situ applied Pipe Coatings . 40C.2.1Coatings based on epoxy resins . 40C.2.2Coatings based on polyurethane . 41C.2.3Coatings for small diameter pipes. 42Uncontrolled if printedPage 2 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomC.3Site applied coatings for water retaining structures . 43C.3.1Coatings based on epoxy resins . 43C.3.2Coatings based on polyurethane . 44C.4Flexible covers and linings for water retaining structures . 45C.5Cementitious coatings . 46C.6Sealant & Repair Materials . 49Part DMembrane and Filtration Systems. 55D.1Membrane and Filtration Elements/Systems . 55D.2Vessels and Containers for Membrane and Filtration Elements .60D.3Electrodialysis Water Treatment Units . 62D.4Filter Media Containing Systems . 62Part EOther Water Treatment Works Installations . 63E.1Tanks . 63E.2Underdrains . 67E.3Pressure vessels . 70E.4Other Products used for the treatment of water . 71Index by Product Name . 76Uncontrolled if printedPage 3 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomPART A CHEMICALS AND FILTER MEDIAIt is the responsibility of the drinking water suppliers to ensure that(a) the method and manner of use; and(b) the purity of these chemicals and products are such that the water treated meets the requirements of therelevant regulations. Where appropriate, additional specific conditions of approval are listed against thechemical or product.Approval holders and water companies should be aware that products or substances that claim to have abiocidal effect or are used as biocides may require authorisation under the Biocidal Products Regulation.HSE is the UK competent authority for the Biocidal Products Regulation and so any queries about whetherthat legislation applies to a specific product or substance should be addressed tobiocidesenquiries@hse.gov.ukA.1Flocculants and CoagulantsA.1.1Products based on tanninThis section contains no productsA.1.3Products based on ironNorthern Ireland WaterSirofloc Magnetite TM M-10Conditions of Approval:DWI 56/4/1338Use of the product must be in accordance with the Instructions forUse: Issue Date: 3.12.2018; Issue No: V001Concentration of iron leaving the works does not exceed 100µg/lApproval expiry date:A.211 August 2024AdsorbentsThis section contains no productsA.3Ion Exchange Resins SystemsA.3.1Ion exchange resinsBarr Wray LtdBarr Wray Colour/Organics Removal Ion Exchange Resin BW 141204DWI 56/4/1238Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Barr Wray Colour/Organics Removal Ion Exchange ResinBW141204 Issue 2 - Nov 2021Approval expiry date:10 January 2027Uncontrolled if printedPage 4 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomBarr Wray Colour/Organics Removal Ion Exchange Resin BW 200613DWI 56/4/1239Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Barr Wray Colour/Organics Removal Ion Exchange Resin BW200613 Issue 2 - Nov 2021Approval expiry date:10 January 2027Barr Wray Colour/Organics Removal Ion Exchange Resin BW 341817DWI 56/4/1237Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Barr Wray Colour/Organics Removal Ion Exchange ResinBW341817 Issue 2 Nov 2021Approval expiry date:10 January 2027Ixom Operations Pty LtdMIEX DOC ResinDWI 56/4/550Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: MIEX DOC Resin. Instructions For Use. Version V5. Date ofIssue: 26/08/2015Approval expiry date:1 September 2026MIEX GoldDWI 56/4/1140Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Revision 5, Date of Issue 03 September 2020Approval expiry date:18 October 2025Lanxess Deutschland GmbHLewatit S 5128Conditions of Approval:DWI 56/4/1193Use of the product must be in accordance with the Instructions forUse: Instructions for Use (IFU) Lewatit S 5128,Issue date: 22/09/2021 Issue No: Version 02Approval expiry date:5 March 2027Purolite International LtdPurolite A520E nitrate selective anion exchange resinDWI 56/4/11Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: A520E nitrate removal from municipal potable water supplies;Issue: 4; Issue Date: 01/05/2021Approval expiry date:27 June 2027Uncontrolled if printedPage 5 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomA.3.2Ion exchange resin based processesBarr Wray LtdIon exchange colour removal systemDWI 56/4/1176Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Barr and Wray Colour Removal System Issue 2 - Sept 2021Approval expiry date:5 December 2026Ionex SG LtdIXL ProcessDWI 56/4/467Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: IFU: Ionex SG IFU IXL Process (IXN Application), Issue No 6Approval expiry date:9 July 2022A.5Disinfection or Cleaning Agents of MembranesDuring the approval process there is no evaluation of a product’s effectiveness, only of its safety in use. Anapproval given in this section does not certify that the Authorities are satisfied that that the product iseffective, but only that it is safe for use in accordance with the Instructions for Use supplied.The fact that a product is approved does not justify any claim about its effectiveness.Brenntag UK & IrelandCitric Acid 50% SolutionDWI 56/4/1333Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Citric Acid 50% Solution IFU: Issue date 13/09/2018; Version 1Approval expiry date:20 November 2023Genesys International LtdGenesol 38DWI 56/4/664Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Issue No: DWI-38-IFU/3 Issue date: 01/08/2019Approval expiry date:5 October 2024Genesol 40DWI 56/4/665Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Issue No: DWI-40-IFU/3; Issue Date: 1st August 2019Approval expiry date:5 October 2024Genesol 61DWI 56/4/1205Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: DWI – 61 – IFU /2, Issue: 2, Date of Issue: 15th Sept 2020Approval expiry date:18 November 2025Genesol 704DWI 56/4/1319Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: IFU Genesol 704 Issue date: 30 April 2018, Issue 1Approval expiry date:29 August 2023Uncontrolled if printedPage 6 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomGenesys CASDWI 56/4/1253Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Genesys CAS, Issue 2, Date 16/02/2022Approval expiry date:16 May 2027Genesys LFDWI 56/4/495Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Instructions for Use: Genesys LF. DWI – LF – IFU / 5 8thOctober 2018Approval expiry date:12 November 2023Genesys LF60DWI 56/4/783Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: DWI-LF60-IFU/4 Dated 26/07/2019Approval expiry date:5 October 2024Genesys LSDWI 56/4/781Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: DWI-LS-IFU/4 dated: 26/07/2019Approval expiry date:5 October 2024Genesys SIDWI 56/4/593Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Instructions for Use: Genesys SI. DWI – SI – IFU/4 Issued 29thApril 2019Approval expiry date:23 June 2024Genesys SWDWI 56/4/524Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Instructions for Use: Genesys SW. DWI – SW – IFU / 5 8thOctober 2018Approval expiry date:12 November 2023Industrial Chemicals LtdICL - Citric Acid SolutionConditions of Approval:DWI 56/4/1342Use of the product must be in accordance with the Instructions forUse: ICL Citric Acid Solution, Issue No.1, 4th December 2018Only to be used off-lineApproval expiry date:14 February 2024Kobell Fluid Technology LtdGuardsman GT190 Antiscalant for Membrane SystemsConditions of Approval:DWI 56/4/1123Use of the product must be in accordance with the Instructions forUse: IFU Guardsman Anti-scalant Guidance Rev: 20130111Guardsman GT190 Anti-scalant Dosing Calculations Rev:20130111Approval expiry date:Uncontrolled if printed9 April 2024Page 7 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomKurita UK LtdAvista 505DWI 56/4/1321Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Instructions for Use – Avista 505, Issue 3, date: 04/12/20Approval expiry date:18 February 2024RoCide DB20DWI 56/4/964Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: RoCide DB20 Instructions for Use, Issue 5 Date: 04/12/2020Approval expiry date:14 January 2026RoClean L211DWI 56/4/945Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: RoClean L211 Instructions for Use, Issue 7. Date: 07/12/2020Approval expiry date:15 October 2025RoClean P111DWI 56/4/737Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: RoClean P111 Instruction for Use- Issue 3 – 04/12/2021 August2017Approval expiry date:15 January 2023RoClean P303DWI 56/4/746Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: RoClean P303 – Issue 3 Date 04/12/2020Approval expiry date:27 October 2024Vitec 3000DWI 56/4/457Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Vitec 3000 Issue 5 – 04/12/2020Approval expiry date:27 February 2023Vitec 4000DWI 56/4/582Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Vitec 4000 Issue:4 Date of Issue 07/12/2020Approval expiry date:22 October 2023Vitec 5000DWI 56/4/458Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Vitec 5000, Issue 5, Date of issue:07/12/2020Approval expiry date:15 January 2023Vitec 7000DWI 56/4/801Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Issue 6, Dated 07/12/2020Approval expiry date:11 April 2025Vitec 7000aDWI 56/4/869Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Vitec 7000a, Issue: 6, Date 07/12/2020Approval expiry date:14 July 2025Uncontrolled if printedPage 8 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomSUEZ Water Technologies & SolutionsBioMate MBC2881DWI 56/4/1276Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: BioMate MBC2881 IFU Issue Date: May 2018Approval expiry date:2 November 2022Hypersperse MDC 704iDWI 56/4/1302Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Hypersperse* MDC 704i IFU. Issue No: Version 2; Issue date:December 2017Approval expiry date:22 January 2023Hypersperse MDC 711Conditions of Approval:DWI 56/4/1300Use of the product must be in accordance with the Instructions forUse: Hypersperse* MDC711 IFU (Instruction for Use)Issue date: December 2017; Issue number: Version 2Approval expiry date:21 June 2023Hypersperse MDC 714Conditions of Approval:DWI 56/4/1301Use of the product must be in accordance with the Instructions forUse: Hypersperse* MDC714 IFUIssue date: December 2017; Issue number: Version 2Approval expiry date:20 December 2022Hypersperse MSI310DWI 56/4/1311Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Hypersperse MSI310 IFU Issue: December 2018, Version 2Approval expiry date:25 June 2023KLEEN MCT515EDWI 56/4/1273Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: IFU Kleen MCT515E Version 2 May 2018Approval expiry date:29 August 2022Kleen MTC405DWI 56/4/1289Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Kleen MTC405 IFU Version 2 January 2018Approval expiry date:17 September 2023Kleen* MCT103DWI 56/4/1008Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: IFU Kleen MCT103. Version 2: May 2018Approval expiry date:29 August 2022Kleen* MCT524DWI 56/4/1007Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Kleen* MCT524. IFU Version 2 : May 2018Approval expiry date:29 August 2022Kleen* MCT882DWI 56/4/1010Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Kleen* MCT882. Version 2 May 2018Approval expiry date:29 August 2022Uncontrolled if printedPage 9 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomWater Treatment Products LimitedWTP RO 411DWI 56/4/821Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Instructions for Use: Water Treatment Products Ltd WTP RO411reverse osmosis antiscalant. Issue 3. Dated: 15 January 2020Approval expiry date:5 July 2025WTP RO 413DWI 56/4/822Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Instructions for use: Water Treatment Products Ltd WTP RO 413reverse osmosis antiscalant. Issue 3 Dated 15 January 2020Approval expiry date:5 July 2025Kurita UK LtdAvistaClean MF 1000aDWI 56/4/1327Use of the product must be in accordance with the Instructions forUse: AvistaClean MF1000a Issue 2; date 04/12/20Approval expiry date:A.616 April 2024Disinfectants for Emergency UseDisinfectants for emergency use are no longer approved and listed under the requirements of relevantregulations. Guidance upon the choice and use of disinfectants in an emergency is provided in Advice Sheet9 ice-and-approval/Advicesheet9.pdf).Approvals of previously listed disinfectants for emergency use have been revoked – see Information Letter08/2008 tters/2008/08 2008.pdf )This section contains no productsA.7Products Based on Traditional ChemicalsA.7.1Traditional ChemicalsThe following traditional chemicals (not currently covered by a specific appropriate BS EN) are considered byDWI to meet the requirements of the relevant regulations subject to the following condition:The method of use and the purity of these products shall be such that, when used in the treatment of waterintended for human consumption, the water so treated shall meet the appropriate requirements of the WaterSupply (Water Quality) Regulations. See Reg 31 letter on the "Review of arrangements for approval ofTraditional Chemicals" issued 6 August 2018 /Reg31Let 060818.pdf)Traditional ChemicalCitric acid (food grade)DWI 56/1/106Conditions of Approval:For use only in cleaning of membranesMagnesium sulphateDWI 56/1/106Use only for re-mineralisation with RO membrane systemsUncontrolled if printedPage 10 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomA.7.2On-site electrolytic generation of chlorineProducts in this section are not fully covered by EN 901 (sodium hypochlorite) and must conform to thefollowing conditions of use:(i) the method of use and the purity of the output of these products shall be such that, in the case of water forpublic supply, the water so treated meets the requirements of the relevant Regulations; and(ii) the treated water must not contain more than 700 µg/l chlorate.Bridge Biotechnology LtdAquaclear ESOL Disinfection SystemDWI 56/4/1406Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Aquaclear ESOL Disinfection System: Instruction for Use (IFU);Issue Date: 09 November 2020; Issue No. 1Approval expiry date:22 November 2025Danish Clean Water A/SSodium Hypochlorite generated by NeuthoxConditions of Approval:DWI 56/4/1298Use of the product must be in accordance with the Instructions forUse: T00 ECA-Generators Machine: Series 02; Dated: 28-11-2017(i) the method of use and the purity of the output shall be such that, inthe case of water supply, the water so treated meets the requirementsof the relevant regulations; and (ii) the water treated must not containmore than 700μg/l chlorateApproval expiry date:19 December 2022Sodium Hypochlorite generated by Neuthox T10/15Conditions of Approval:DWI 56/4/1315Use of the product must be in accordance with the Instructions forUse: T10 ECA-GeneratorsMachine: Series 02; Dated: 20-01-2018(i) the method of use and the purity of the output shall be such that, inthe case of water supply, the water so treated meets the requirementsof the relevant regulations; and (ii) the water treated must not containmore than 700μg/l chlorateApproval expiry date:29 July 2023Sodium Hypochlorite generated by Neuthox T20Conditions of Approval:DWI 56/4/1318Use of the product must be in accordance with the Instructions forUse: T20 ECA-GeneratorsMachine: Series 00012; Dated: 15-02-2018(i) the method of use and the purity of the output shall be such that, inthe case of water supply, the water so treated meets the requirementsof the relevant regulations; and (ii) the water treated must not containmore than 700μg/l chlorateApproval expiry date:Uncontrolled if printed26 July 2023Page 11 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomDe Nora Water Technologies UK Services LtdClortec cellDWI 56/4/549Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: Revision 3.3; 25 September 2019Approval expiry date:15 June 2025Evoqua Water Technologies LtdWallace & Tiernan OSEC B-PAK seriesConditions of Approval:DWI 56/4/1451Use of the product must be in accordance with the Instructions forUse: OSEC B-PAK Instruction Manual WT.085.090.000.DE.IM.0921(i) the method of use and the purity of the output of these productsshall be such that, in the case of water for public supply, the water sotreated meets the requirements of the relevant regulations, and (ii) thetreated water must not contain more than 700µg/l chlorateApproval expiry date:13 January 2027Wallace & Tiernan OSEC B-PLUSConditions of Approval:DWI 56/4/1450Use of the product must be in accordance with the Instructions forUse: OSEC B-PLUS Instruction Manual WT.085.105.000.IE.IM.0921(i) the method of use and the purity of the output of these productsshall be such, that , in the case of water for public supply, the water sotreated meets the requirements of the relevant regulations, and (ii) thetreated water must not contain more than 700µg/l chlorate.Approval expiry date:13 January 2027Wallace and Tiernan OSEC LDWI 56/4/775Conditions of Approval:Use of the product must be in accordance with the Instructions forUse: OSEC L Instruction Manual - WT.085.055.000.DE.IM.1121Approval expiry date:13 January 2027Gaffey Technical Services LtdSodium Hypochlorite generated by Hyprolyser Electrochlorination SystemConditions of Approval:DWI 56/4/1341Use of the product must be in accordance with the Instructions forUse: Hyprolyser 280, 560, 110, 2200 Electrolysis system for on-sitehypochlorite generation. IFU Issue Date: Nov 2018; Issue No.IFUv1.1(i) the method of use and the purity of the output of these productsshall be such that, in the case of water for pulic supply, the water sotreated meets the requirements of the relevant Regulations; and (ii)the treated water must not contain more than 700 µg/l chlorate.Approval expiry date:Uncontrolled if printed20 February 2024Page 12 of 90Issue date: 20 June 2022
List of approved products for use in public water supply in the United KingdomLutz-Jesco GmbHEasychlorgen 280 – 2200 Electrolysis system for on-site hypochloritegenerationConditions of Approval:DWI 56/4/1369Use of the product must be in accordance with the Instructions forUse: Easychlorgen 280 – 2200 Electrolysis system for on-sitehypochlorite generation - IFUv1.1 Issued: 11/2018(i) the method of use and the purity of the output of these productsshall be such that, in the case of water for public supply, the water sotreated meets the requirements of the relevant Regulations; and (ii)the treated water must not contain more than 700 μg/l chlorate.Approval expiry date:20 February 2024Prodose LtdSodium Hypochlorite generated by MP ElectrolyserConditions of Approval:DWI 56/4/1082Use of the product must be in accordance with the Instructions forUse: Statement of effectiveness in use. Fitness for purpose Version 4Issued 25th February 2018(i) the method of use and the purity of the output of these productsshall be such that, in the case of water forpublic supply, the water so treated meets the requirements of therelevant Regulations; and(ii) the treated water must not contain m
Use: Instructions for Use System Cement Mortar lined Ductile Iron Pipe Issue no: 4 March 2017 . Approval expiry date: 8 November 2022 . B.1.7.2 Cement mortar lined pipes with seal coat . . Use: Title: Stainless steel pipe fabrication for water intended for human consumption on Water industry sites; Issue: 1; Issue Date: 03/02/2022 .
