Watermen: A Dirty Business (2014)

Water is vital to life but all of it is not created equal, and getting clean water is a dirty business - literally. People who work for Britain's biggest water companies have to face messy, and at times revolting, situations in order to unblock a drain or fix a leaky faucet and improve the condition of a customer's water. This programme profiles some of the workers - from sewer men to engineers - who are tasked with the dirty jobs that are needed to keep the country supplied with water. It may not be an easy job but it is an important one.