The historic center of Italy’s Venice has practically no sewage system, and in the few cases where facilities do exist, they are very old and inefficient. That’s why people like Enrico, his son and their two workmates have this particular job: unclogging Venice’s drains and septic tanks. Available 24 hours a day, they sail the canals with their tank boat, carrying out maintenance work on individual houses before picking up the waste from groups of buildings. When full, they head north to the treatment plant on the island of Murano to empty their load.