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.
