Latest: We simply don't know about the state of our pipes, says Irish Water

Latest: Irish Water admits it is unclear about the state of its pipes and says there are not enough spare parts in case of emergency.

Update - 9.25am: Irish Water admits it is unclear about the state of its pipes and says there are not enough spare parts in case of emergency.

The utility company has just published a report into a mass supply failure in the North East this summer.