Thousands of homes are facing a play without h2o owed to a burst pipe, though supplies are starting to instrumentality to immoderate customers.
An estimated 40,000 homes are thought to person been affected by the incidental successful Dolgarrog, Conwy region connected Wednesday, which forced immoderate schools and businesses to close.
Welsh Water confirmed the tube had been repaired connected Friday day but h2o would not beryllium afloat restored to for "up to 48 hours".
The company's main enforcement Peter Perry described the incidental arsenic a "catastrophic failure" caused by crushed movement, which could not person been foreseen oregon prevented.
Speaking to BBC Radio Wales Breakfast, Mr Perry said: "We've seen nary increases successful travel to bespeak determination was occupation until Wednesday erstwhile we saw this catastrophic failure.
"Conwy, Dolgarrog, Trefriw, Llanrwst, Eglwysbach and fewer others are present coming backmost into water.
"We are doing this arsenic a controlled operation. The past happening we privation present is to person further bursts connected the system," helium added.
Welsh Water said proviso would travel backmost connected astatine antithetic times for antithetic radical and "discoloured water" was mean aft a proviso interruption.
The institution said thousands of homes had been restored by Saturday morning.
Some successful Conwy municipality said their h2o "dribbled" backmost connected astatine astir 04:00 GMT connected Saturday morning.
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Eligible households volition beryllium paid £30 for each 12 hours their supplies person been affected portion concern customers volition beryllium paid £75 for each 12 hours, arsenic good arsenic being capable to marque further claims for mislaid net online.
Bottled h2o stations person been acceptable up astatine 4 stations successful Conwy, moving successful Park Eirias successful Colwyn, Zip World Conwy, Llandudno West Shore car parkland and Bodlondeb site.
Several schools, businesses and assemblage hubs were forced to unopen connected Thursday and Friday owed to the h2o outage.
The institution said the harm to the pipe, which was successful a river, had been caused by unit from rocks.
The web is astir 900km (560 miles) agelong and includes 13 underground retention tanks, the largest of which is the size of 9 Olympic-size swimming pools.