Evaluations of equivalent standards to Regulators' Specification

The Regulators’ Specification provides test and acceptance criteria for many water fittings in the form of Test Code Sheets, which are available on the WRAS website (Regulators' Specification Search).

WRAS approval is only granted to water fittings which satisfy the Regulators Specification. If a manufacturer has a water fitting which has been assessed against a national standard, in order to minimise additional costs which would arise by requiring re-testing to the Regulators Specification, WRAS have undertaken comparisons of the standards listed below.  

These comparisons identify the parts of the Regulators' Specification which are considered to be covered by  the standard and any additional testing that may be required where it does not offer the equivalent level of protection or performance. Where there are any shortfalls or the standard is not deemed to meet the Regulators' Specification in any aspect, additional testing will be required. 

WRAS will only accept test reports against current standards and the testing must be no more than 2 years old when presented to the Product Approval Group. Additionally, the test facility issuing the test report must have accreditation in accordance with ISO 17025 for the particular standard and the Accreditation should be issued by the United Kingdom Accreditation Service (UKAS), or by an equivalent overseas body which is subject to the multilateral agreement accepted by the European co-operation for Accreditation (EA), the International Accreditation Forum (IAF), or the International Laboratory Accreditation Co-operation (ILAC).

If any additional testing is required, the test facility undertaking this testing must also have accreditation in accordance with the above for the particular Test Code Sheet. 

If the national standard your product complies with is not listed, a comparison can be undertaken by an independent party appointed by WRAS. The cost of comparison will be met by the applicant and the results will be published on the WRAS website.

Guidance on test laboratory accreditation can be found within the product approval guidance.


BS EN 1254-1:1998 Copper and copper alloys. Plumbing fittings. Fittings with ends for capillary soldering or capillary brazing to copper tubes.

BS EN 1254-2:1998 Copper and copper alloys. Plumbing fittings. Fittings with compression ends for use with copper tubes.

BS EN 593:2009  Industrial valves. Metallic butterfly valves

BS 4213:2004  Cisterns for domestic use. Cold water storage and combined feed and expansion (thermoplastic) cisterns up to 500 l. Specification

BS 3198:1981 Specification for copper hot water storage combination units for domestic purposes

BS EN 12729:2002  Devices to prevent pollution by backflow of potable water. Controllable backflow preventer with reduced pressure zone.  Family B. Type A

BS 1212 pt3:1990 Float operated valves. Specification for diaphragm type float operated valves (plastics bodied) for cold water services only (excluding floats)

BS 5391-1:2006  Acrylonitrile-butadiene-styrene (ABS) pressure pipe. Specification

BS 5392-1:2006  Acrylonitrile-butadiene-styrene (ABS) fittings for use with ABS pressure pipe. Specification

BS EN 1566-1:2002+A1:2011 Copper indirect cylinders for domestic purposes. Open vented copper cylinder. Requirements and test methods.

BS 1566-2:1984  Copper indirect cylinders for domestic purposes. Specification for single feed indirect cylinders

BS EN 1057:2006+A1:2010  Copper and copper alloys. Seamless, round copper tubes for water and gas in sanitary and heating applications

BS 7291-1, 2 & 3:2010  Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. General requirements. Specification for polybutylene (PB) pipes and associated fittings. Specification for cross-linked polyethylene (PE-X) pipes and associated fittings

BS EN 200:2008  Sanitary tap ware; General specifications for single taps and mixer taps (nominal size ½) PN10

BS EN 13959:2004  Anti-pollution check valves – DN6 to DN250 inclusive Family E, Type A, B, C and D.