What you need to know about DWI and WRAS
An important consideration if you are looking to provide drinking water is to ensure that the equipment used from the source of the water, up to the point of delivery to the consumer’s building is DWI and/or WRAS compliant. Regulation 31 of DWI deals with products used in the treatment and distribution of water supplies.
So what’s the difference between DWI and WRAS?
Drinking Water Inspectorate approval (DWI) is the legal requirement for all distribution and water treatment pipe, fittings and storage tanks including Polyethylene, PVC & HDPE products. For systems that are responsible for transporting drinking water above the stop cock, the system needs to be WRAS (Water Regulations Advisory Scheme) approved, again this is needed for all Polyethylene, HDPE and PVC pipe, tanks and fittings.