BS EN ISO 7686:2005

This standard BS EN ISO 7686:2005 Plastics pipes and fittings. Determination of opacity is classified in these ICS categories:

• 23.040.45 Plastics fittings
• 23.040.20 Plastics pipes

This International Standard specifies a method for the determination of the opacity of plastics pipes and fittings.

Annex A gives guidance on the light transmission of opaque pipes and fittings.

NOTE It is necessary for a pipe or fitting used for water supply which is exposed to visible light during service to be sufficiently opaque to prevent algae growth.