Caerphilly water supplies to return after burst main
Up to 500 properties affected by a burst water main in Caerphilly county should have supplies restored by Thursday evening, Welsh Water has said.
Damage caused by a contractor of Natural Resources Wales on Wednesday hit properties in Abercarn, Cross Keys, Ynysddu and surrounding areas.
A "significant amount" of water lost through the damage but engineers have "pieced together" the large main.
The cost of the damage is estimated to be between £300,000 to £500,000.
Peter Perry, chief operating officer at Welsh Water, said the problem was "quite frustrating".
He said: "Far too many utilities - not just water mains but electricity cables and gas mains - get damaged by contractors.
"Before they put a spade in the ground, all they have to do is contact us. We will come out and help them. In this case it didn't happen."
Natural Resources Wales said its contractors were working on the Risca flood scheme in Caerphilly when the high-pressure main was damaged.
A spokesman said: "Our contractors were aware of the proximity to the main water supply and we will be undertaking a full investigation to find out how this happened."
Mr Perry said customers would not have to foot the bill which he estimated could be as much as £500,000.
"We fully recover our costs when a third party carries out damage like this, particularly when they haven't gone through the process to locate apparatus properly," he added.
"This cost won't land on our customers. We will pursue [third party] them for costs through their insurers."