WELL is a product classification system of the European sanitary valve industry, which

• fulfils the increasing and understandable desire of consumers, both in Europe and worldwide, for information and guidance in making a conscious purchasing decision.

• implements the industry's desire to promote responsible water usage by consumers.
 

WELL subscribes to the following guiding principles:

• The user or operator must be able to detect an immediate, actual saving if a higher-quality valve or additional individual components are installed.

• The evaluation system must set international standards.

• The evaluation system must be easily understandable.