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What is the minimum distance plumbing vent terminals should be located horizontally from fresh air intakes?
5 feet
10 feet
15 feet
25 feet
The correct answer is: 25 feet
The minimum distance plumbing vent terminals should be located horizontally from fresh air intakes is 25 feet. This requirement is primarily designed to ensure that any gases or odors emitted from the plumbing vents do not contaminate the fresh air that is being taken into buildings or other structures. Proper venting distance helps maintain air quality and prevents potential health hazards that can arise from inhaling harmful substances. By adhering to this 25-foot requirement, plumbing systems can function more effectively without negatively impacting the indoor air quality of living and working spaces. The greater distance also accommodates for variations in wind direction, further protecting the intake from any possible backflow of air pollutants.