Criteria for: Rainwater Harvesting Equipment, Monitoring and Control Equipment

Monitoring and Control Equipment

Equipment to control the supply of rainwater from a rainwater storage tank and to facilitate the back up use of mains water within the system.

Water level and consumption indicators
To be eligible for inclusion on the Water Technology List the equipment must meet the following definition:

A device that monitors water level, consumption or both, within a rainwater storage vessel.

Mains back up control units
To be eligible for inclusion on the Water Technology List the equipment must meet the following definition:

A device that activates the water company mains back-up supply during periods of low rainfall when there is insufficient stored rainwater. The control unit must comply directly, or include guidance to comply, with the Water Supply (Water Fittings) Regulations' requirement for a 'Type AA or AB' air gap defined under EN1717. This is to prevent the potential contamination of the mains water supply from the water stored within the rainwater harvesting system.

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