Water fittings regulations

The Water Supply (Water Fittings) Regulations 1999 govern the installation and maintenance of water fittings in any premises which are connected, or are to be connected, to a public water supply.

The regulations do not apply to premises which only have a private source of water, although they do provide a useful code of practice for private supplies.

The regulations protect public health and promote sensible and efficient use of water by placing legal duties on the installers of water systems and owners and occupiers of premises.

We have put together some useful information and guides which can be found below.

Planning some plumbing work?

Whether you have built a new property, installing a garden watering system or installing a bath which holds more than 230 litres of water there are a number of changes you might be making which you need to tell us about.

We have put together a simple guide to help you which you can find here.

Water Regulations Guides

If you would like more information on Water Regulations for Domestic Properties, please see our useful guide here.

For Farm & Agricultural click here.

For Hotel & Catering click here.

For General water fittings regulations click here.

Rainwater Harvesting

To find out more about Rainwater Harvesting click here.

Double Check Valves (DCV) - internal domestic appliances

In April 2017, the Water Regs UK released an amendment in relation to installation requirements under the Water Supply (Water Fittings) Regulations 1999 in England and Wales which now means these appliances will need an additional DCV installed at the point of connection between the water supply and the appliance.

IRN 160:
“A compliant double check valve or some other no less effective device providing backflow prevention protection to at least fluid category three shall be fitted at the point of connection(s) between the water supply and the fitting or appliance. Where the double check valve is for use with products that incorporate water injected with CO2 gas all metal parts in contact with the water passing through it must be constructed from chrome nickel stainless steel.”

IRN 360:
“Domestic unvented primary circuits may be filled or replenished by means of a temporary connection between the primary circuit and the supply pipe. An ‘Approved’ double check valve shall be installed at the point of connection to the supply pipe. A permanent connection between the primary circuit and the supply pipe may be made via a CA backflow prevention device or some other no less effective backflow prevention device.”

Historically, an assumption was made that all domestic appliances were fitted with double check valves and internal inspections would have passed.

Please be aware that our Customer Services Representative team will now fail all domestic internal inspections where appliances such as washing machines, washer-dryers and dishwashers where the fitting is not present.

We are happy to help you further should you need assistance or need more information. please call us on: 0345 60 66 087, we're open Monday to Friday 08.00-17.00. Or if you prefer you can email us: reg5@anglianwater.co.uk

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Water fittings regulations