Customers in the south Wales Valleys maybe experiencing discolouration to their tap water supply.

This has been caused a burst trunk water main which follows the route of the A470 from Aberfan to Taffs Well. The burst occurred on Wednesday evening and repair work was carried out overnight however supplies were affected which has led to discolouration in some areas.

The areas affected are:

Aberfan
Pengam
Mountian Ash
Nelson
Pontypridd
Beddau
Tonteg
Cilfynnydd
Treharris
Trelewis
Hengoed
Ystrad Mynach
Rhydfelin
Caerphilly
Tonypandy
Machen
Ynys y Bwl
Bargoed
Penallta

We are advising customers to run their cold water taps until the water runs clear.  Bottled water is being delivered to customers on our additional needs register.

We would like to apologise for any inconvenience caused and if customers require any further advice, please contact the 24 hour operational activity centre on 0800 0520130, which is free from a UK landline.

Publications you may find of use:

Discoloured water

Due to the severe weather conditions we are experiencing a high level of calls from customers with frozen pipes. Customers are advising us that they have no water or frozen pipes. Unfortunately, we are unable to assist if it is your service pipe that is frozen i.e. the pipe that carries water into the first incoming tap at your property. This can be the cold tap in the kitchen or a utility room or downstairs bathroom cold tap. Frozen pipes can cause problems for properties during the winter months and if you are experiencing problems due to frozen pipework you can try thawing your service pipe.

• Do not pour hot water on to external stop taps, and do not operate your external stop tap as this could be dangerous (they are usually situated next to highways).
• Locate your internal stop tap (usually under the sink, downstairs toilet, understairs etc). You will need to contact your local plumber if you are unable to locate your stop tap.
• You can use a hot water bottle or hairdryer to try to thaw the pipe starting from the end nearest the first incoming tap, ensure you apply the heat in short bursts and please note you should not use a naked flame near the pipes (do not use a blow torch or heat gun).
• Try pouring warm water on your bib tap (garden tap) to try and thaw this way.

For further advice on how to avoid getting frozen pipes please see our fact sheet ‘Don’t crack up wrap up’.