What do the Water Fittings Regulations and Byelaws apply to?

The Water Fittings Regulations and Scottish Water Byelaws apply to all plumbing systems, water fittings and water-using appliances supplied, or to be supplied, from the public water supply. They apply to systems in all types of premises. These regulations apply from the point where water enters the property’s underground pipe. They do not apply to premises without a public water supply connection.