Water regulations

The Water Supply (Water Fittings) Regulations 1999 set out the installation requirements for plumbing systems. It works the same way as building regulations set out the requirements for buildings.

They set out the legal requirements for the design, installation, operation and maintenance of plumbing systems, water fittings and water-using appliances and supersede the previous Water Supply Byelaws. They have a specific purpose to prevent misuse, waste, undue consumption, or erroneous measurement of water and, most importantly, to prevent contamination of drinking water.

Where do they apply?

They apply to all plumbing systems, water fittings and equipment supplied, or to be supplied, with water from the public water supply come under these regulations. This applies to systems in all types of premises including properties that use a private water supply and have a mains backup provided by water companies. 

These regulations do not apply where a property uses a private water supply and does not have a supply of water from a water company. However, it is good plumbing practice to follow the requirements of the regulations.

Who must comply?

A legal duty is placed on all users, owners or occupiers and anyone who installs plumbing systems or water fittings to ensure they are installed and used following the water regulations. Advanced notice must be given of proposed installations in most cases, so architects, building developers and plumbers must follow the regulations on behalf of future owners or occupiers.

At Yorkshire Water, we have a Water Regulations team available to support your legal requirement to comply. More information about the water supply (water fittings) regulations 1999 can be found in the following sections.