British Standards Institution

Source:: BSI
Committee:: B/504/-/14 - Valves and fittings for buildings & devices to prevent pollution by backflow
Categories:: Information management | Standardization. General rules
Comment period start date:: 02/12/2024
Comment period end date:: 27/12/2024

Comment by:

27th Dec

Scope

This standard specifies the characteristics and the requirements of a Pipe interrupter (DC) for use when connection to a supply pipe having a inlet diameter nominal of DN22 to DN42 and is required for the prevention of contamination of the water supply by backflow. This standard applies to Devices to prevent pollution by potable water - Pipe interrupter with permanent atmospheric vent DN 22 to DN 42 - Family D, type C.

Purpose

In England and Wales, the Water Supply (Water Fittings) Regulations 1999 (‘the regulations’) regulate how water systems are designed, installed and operated. In the regulations and in the ‘Regulator Specifications’ the size range of inlet connection to the DC device incorporated into a pressure flushing valve is outside the size range of the inlet connection.

Pressure flushing valves, because of their use are required to supply volumes of water quickly to a WC or urinal have rather large DN connections typically 32mm. This is where we have an issue as the existing standard for pipe interrupters EN 14453 and the Regulators specification only details devices up to and including a DN of 20mm and therefore devices of DN32mm are excluded.

A BS would ensure that future innovation and development will be co-ordinated with industry as standards undertake a 5-year review whereas the DEFRA Regulators Specifications are never updated with this recent update being the first in 25 years.

The availability of the specification as a British Standard will consolidate the installation of pressure flushing devices that is missing in the marketplace.

Comment on proposal

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Are you aware of any regulation, existing standards and other good practice information in this area in the UK (e.g. Industry codes of practice; company specifications, international or European Standards)? *

Would the development of a standard(s) in this area have a particular impact/relevance to SME, consumer, environmental or societal interests? *

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Discard

Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

02/12/2024

Proposal end date:

27/12/2024

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

Learn more about the standards development process

Standards Development

BS XXXX Devices to prevent pollution by potable water - Pipe backflow of interrupter with permanent atmospheric vent DN 22 to DN 42 - Family D, type C

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