The Water Regulations Advisory Scheme (WRAS) is a conformance mark that demonstrates that an item complies with high standards set out by water regulations promulgated in 1999 in the United Kingdom. It is enforced by the UK water supply companies. It covers all plumbing systems, water fittings, and equipment supplied, or to be supplied, with water from the public water supply. It is illegal to install a product such as water fittings in the UK without the WRAS mark.