The Regulations set requirements for the design, installation and maintenance of plumbing systems, water fittings and water-using appliances. They are also there to prevent waste, misuse, undue consumption, contamination and erroneous measurement of water. They apply in all types of premises to plumbing systems, water fittings and appliances connected or to be connected to the water supply. They apply to underground pipework, including the service pipe connecting premises to the supplier's water main.

For more information, please see Water Regulations or contact the Water Regulations Advisory Scheme.