Criteria for: Efficient Showers, Flow Regulators

FlowRegulator

To be eligible for inclusion on the Water Technology List the device must meet the following definition:

Show evidence of compliance with the following sections of the Water Supply (Water Fittings) Regulations 1999:

• Part II Requirements – Paragraph 4 ‘Requirements for water fittings etc’
• Schedule 2 – Requirements for water fittings, paragraph 2 ‘Materials and substances in contact with water’
  Note: This would be demonstrated by approval through WRAS (or equivalent independent product certification body) or a declaration that all non-metallic materials in contact with the water comply with BS 6920
• Schedule 2 – Requirements for water fittings, paragraphs 3, 4 and 5 ‘Requirements for water fittings’
  Note: This would be demonstrated by approval through WRAS (or equivalent independent product certification body) or a declaration of compliance with the following regulators’ specifications
  6001.1 – Identification (if applicable)
  1112.1 – Porosity test (pressure resistance) (if applicable)
  1113.1 – Joint effectiveness (mechanical strength (if applicable)

Compliance with the regulations may be demonstrated by approval through WRAS.  Alternatively companies accredited to ISO 9001 may provide a declaration of conformity with the Regulations.

An automatic flow limiting device for incorporation into a shower system is defined as a flow limiting device which has a EN ISO228-1 size ½ inlet and outlet thread, and that restricts flow to 9 l/min when operated at 5 bar pressure.

Flow Regulators for use with showers must also meet the following requirements:
Hydraulic Characteristics - when tested using test apparatus generally in accordance with BS 6340-4:1984 the measured flowrate shall not exceed 9 litres/minute under pressures up to the maximum operating pressure specified by the manufacturer or at pressures up to and including 5 bar where no maximum is specified. The assembly shall comprise a shower hose and handset, which when tested without the flow regulator would exceed 9 litres/minute at 5 bar.

Manufacturers should apply to Defra with evidence that their products meet these criteria in order to appear on the Water Technology List.