This episode showcases the battle against time, as United Utilities deal with the ageing water grid. In Blackpool, Andy and Terry deal with an ancient collapsed sewer which has caused a pavement to subside before tackling a rather pungent blocked sewer. A 40 year-old water main in Cheshire bursts leaving two thousand irate villagers without water. Meanwhile in Rochdale, waste water team Adrian and Wes investigate a blocked Victorian sewer which is overflowing onto a main road. However it is a learning curve for some as the aqueduct which supplies Manchester's water supply is turned off for the first time in 60 years to check for repairs. It is a jaw dropping thought that the 4000 men who originally built the tunnel had none of the technology team have nowadays, a testament to the skill and engineering we still rely upon today.
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