LIST OF APPROVED - DWI, UK

1 1 LIST OF PRODUCTS Permitted under Regulation 5 for use in Private Water Supplies in England and Wales November 2018 guardians of drinking water quality UNCONTROLLED IF PRINTED Issue date: November 2018 DOCUMENT CONTROL The only controlled version of this document can be accessed on the DWI Website Printed copies of this document, together with electronic copies held on local computers and other storage devices are uncontrolled. Last updated: November 2018 Errors and corrections: Please contact us if you find any errors or if corrections are needed DWI CONTACT DETAILS Private Water Supplies Enquiries, Drinking Water Inspectorate Area 1A, Nobel House, 17 Smith Square, London SW1P 3JR Tel +44 (0)300 068 6400 E-mail : 1 Table of Contents BACKGROUND.

2 2 INTRODUCTION .. 2 APPROVAL UNDER REGULATION 5 .. 3 INTRODUCTION TO THE LIST OF APPROVED PRODUCTS .. 4 THE APPROVAL OF A PRODUCT .. 4 CRITERIA FOR INCLUSION ON TRANSITIONAL LIST FOR USE IN PRIVATE WATER SUPPLIES .. 5 TRANSITIONAL LIST OF PRODUCTS/SUBSTANCES PERMITTED FOR USE IN PRIVATE WATER SUPPLIES .. 6 WRAS APPROVED PRODUCTS .. 7 PRODUCTS APPROVED UNDER REGULATION 31 .. 13 ION EXCHANGE RESIN SYSTEMS .. 13 ON-SITE ELECTROLYTIC GENERATION OF CHLORINE .. 13 ON-SITE GENERATION OF CHLORINE DIOXIDE .. 13 FILTER MEDIA .. 14 POLYETHYLENE (PE) PIPES .. 14 BARRIER AND LAMINATED PIPES .. 16 POLYVINYLCHLORIDE (PVC) PIPES .. 16 ACRYLONITRILE-BUTADIENE-STYRENE COPOLYMER (ABS) .. 16 PIPES COATED WITH FACTORY APPLIED NYLON RESIN.

3 17 PIPES COATED WITH FACTORY APPLIED EPOXY RESIN .. 17 STAINLESS STEEL PIPES .. 18 PIPES COATED WITH A FACTORY APPLIED POLYOLEFIN .. 19 WELL CASINGS, SCREENS AND RISING MAINS .. 19 MEMBRANE AND FILTRATION ELEMENTS/SYSTEMS .. 20 VESSELS AND CONTAINERS FOR MEMBRANE AND FILTRATION ELEMENTS .. 21 TANKS .. 21 PRESSURE VESSELS .. 22 LOW CONTACT COMPONENTS AND PRODUCTS (Regulation 31(4)(b)) .. 23 INTRODUCTION .. 23 PRODUCTS LIKELY TO FALL INTO REGULATION 31(4)(B) .. 23 BRITISH STANDARDS BS EN FOR CHEMICALS AND MEDIA USED FOR TREATMENT OF WATER .. 25 UNCONTROLLED IF PRINTED 2 Issue date: November 2018 BACKGROUND GENERAL DEFINITIONS The relevant regulations (for private drinking water suppliers) The following regulations apply to the approval of substances and products used in the provision of private water supplies within the United Kingdom: a) England - Regulation 5(1) of The Private Water Supplies (England) Regulations 2016 (Statutory Instrument 2016 No.

4 618) b) Wales Regulation 5(1) of The Private Water Supplies (Wales Regulations 2017 (Welsh Statutory Instrument 2017 No. 1041 ( ) c) Northern Ireland Regulation 6(1) of The Private Water Supplies Regulations (Northern Ireland) 2017 (Statutory Rules of Northern Ireland 2017 ) - . This list applies to water supplied under Regulation 5 (1) of the Private Water Supplies (England) Regulations 2016 and Regulation 5(1) of the Private Water Supplies (Wales) Regulations 2017. Where reference is required to specific regulatory requirements, these are given in footnotes. The List The list published here is not exhaustive with respect to Regulation 31 APPROVED products or WRAS APPROVED products.

5 Both of these lists are continually being updated, and the most up to date lists should be consulted in order to provide assurance that products are APPROVED . This list contains examples of products that are likely to be found or used in private water supplies. Current lists for Regulation 31 and WRAS APPROVED products may be found at and respectively. UNCONTROLLED IF PRINTED 3 Issue date: November 2018 INTRODUCTION The products in this list have only been assessed for their safety for use in water supplies; they have not been assessed for their fitness for purpose. Section 69 of the Water Industry Act 1991, as amended by the Water Act 2003, gave the Secretary of State for the Environment, Food and Rural Affairs and the Welsh Ministers powers to make regulations controlling substances, processes and/or products that are used in the treatment and provision of private water supplies.

6 Section 76B of the Water (Scotland) Act 1980 gives Scottish Ministers similar powers. The Drinking Water Inspectorate (DWI) carries out the approval process for the Authorities for the whole of the United Kingdom, under the relevant Regulations. DWI accepts applications for approval of products used both before the treatment, within water distribution systems and up to the point of delivery to premises. APPROVAL UNDER REGULATION 5 Products may be suitably APPROVED under Regulation 5 of the PWS in one of five ways: 1. Listed in the Secretary of State s list of APPROVED products for use in Public Water Supply in the United Kingdom (current version is available on the DWI website); 2. Listed in the Water Regulations Advisory Service (WRAS) Water Fittings and Materials Directory (available on the WRAS website: ) as a suitable material for use in plumbing systems within buildings; 3.

7 The particular usage of the product/substance results in either a minimal surface area exposure or a transient contact time with water and testing using BS6920 methodology has shown that the product/substance does not give rise to an objectionable taste or odour and does not encourage microbial growth. 4. Treatment chemicals conforming to a BS:EN standard and dosed in accordance with any national conditions of use (Current BS:EN standards and conditions of use are shown in the Secretary of States List of APPROVED products for use in Public Water Supply in the United Kingdom). 5. Included in the Transitional List of traditional products and substances for use in Private Water Supplies UNCONTROLLED IF PRINTED 4 Issue date: November 2018 INTRODUCTION TO THE LIST OF APPROVED PRODUCTS All APPROVED products must be used in accordance with any specific conditions of approval, listed against the product names.

8 In addition, use is in accordance with an Instructions for Use document provided by the product manufacturer. THE APPROVAL OF A PRODUCT Approval is based upon consideration as to whether the use of a substance or product will adversely affect the quality of the water supplied, or cause a risk to the health of consumers; no consideration is given to its fitness for purpose and approval by the Authorities must not be taken as a favourable assessment of the performance or merits of any substance or product. It is the responsibility of the relevant person to ensure fitness for purpose. UNCONTROLLED IF PRINTED 5 Issue date: November 2018 CRITERIA FOR INCLUSION ON TRANSITIONAL LIST FOR USE IN PRIVATE WATER SUPPLIES Regulation 5(1) of the Private Water Supplies Regulations 2016 (2017 in Wales) requires that any product or substance used in the operation or distribution of a private supply or impurities associated with such products or substances, must not be present in water at the point of use at levels that would make it unwholesome or constitute a potential danger to human health.

9 Products or substances used after the coming into force of these Regulations must either: be permitted to be used in a water supply under Regulation 31 of the Water Supply (Water Quality) Regulations 2016 (2017 in Wales) hold a product approval from WRAS be covered by a current BS EN for treatment chemicals and products comply with Regulation 31(4)(b) of the Water Supply (Water Quality) Regulations 2016 (2017 in Wales) Although a wide variety of products and substances have been used for many years in private water supplies, as yet very few have been evaluated formally for placing on the Secretary of State s List of APPROVED Products/Substances. For this reason, DWI has put in place transitional arrangements and criteria for compliance and these are set out below.

10 Any product or substance which has been used in no fewer than three different private supplies for at least 12 months prior to application for inclusion on the list may be deemed to comply with Regulation 5 provided there is evidence to show that the supplies in question were of satisfactory water quality and there is no history of consumer complaints or adverse health effects. It is expected that manufacturers/suppliers of any product or substance which are deemed compliant under these transitional arrangements will obtain guidance from DWI on the steps required in order to obtain approval under Regulation 31. DWI will add products/substances to a transitional list of products/substances on receipt of the following information: (i) provision of details of locations of 3 or more private water supplies where the product or substance has been in use for at least 12 months; and (ii) test sample results and other relevant data to demonstrate compliant water quality and the absence of public health or consumer concerns and (iii) product information including conditions of use.