Water cut off twice at Welshpool Victoria Memorial Hospital
A hospital was left without water twice in three days, leaving the fire service to provide emergency supplies.
A burst main affected Welshpool's Victoria Memorial Hospital for a few hours last Saturday and Monday.
Utilities firm Severn Trent said it was installing a system which would help prevent the hospital losing its supply again.
The hospital's new kidney dialysis unit needs 1,200 litres of water every hour when running at full capacity.
Powys Teaching Health Board said Victoria Memorial was left without water twice for a "couple of hours each time" and it was an inconvenience to staff but not a major problem.
A spokesman confirmed that Mid and West Wales Fire and Rescue Service and Severn Trent kept water flowing there with emergency supplies.
Severn Trent apologised and said repairs had been carried out.
"Following a burst water pipe last Saturday in Welshpool, we worked quickly to make sure our customers' supply was restored," said a company spokesperson.
"Unfortunately, the Victoria Memorial Hospital was affected again on Monday so we used a tanker to make sure its supply was restored.
"We are working with the hospital to make sure that back up systems are in place and, next week, we will be making changes to the water supply system to help prevent this from happening in the future.
"In the longer term, to further improve the reliability of water supply to the area, we're developing plans to install new water pipes and we expect work to be carried out before April next year.
"We'd like to apologise for any inconvenience this may have caused and thank our customers for their patience."