Cross Connection Practice Exam

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What is the maximum height from the finished floor that testable backflow preventers must be installed before a fixed platform is required?

  1. 1000 mm (3')

  2. 1500 mm (5')

  3. 2000 mm (6')

  4. 2500 mm (8')

The correct answer is: 1500 mm (5')

The correct answer is that testable backflow preventers must be installed at a maximum height of 1500 mm (5'). This regulation is important for ensuring that access to these devices is safe and convenient for routine testing and maintenance. When backflow preventers are installed above this height, a fixed platform is necessary to allow technicians to perform their duties effectively without risk of injury or difficulty reaching the device. This height requirement helps maintain the operational integrity of the backflow preventers, as they need to be regularly tested to ensure they are working correctly and preventing contamination of the potable water supply. It also aligns with safety and accessibility standards that prioritize ease of access for maintenance personnel.

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