Red Seal Plumbing Practice Exam

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Elevate your plumbing career with our Red Seal Plumbing Exam quiz. Crafted to test and enhance your knowledge, ensuring you're fully prepped for success. Dive in now!

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An outside fresh air supply must be installed at least how many inches above finished grade level?

6 inches
8 inches
10 inches
12 inches

The correct answer is: 12 inches

Installing an outside fresh air supply too low to the ground can lead to potential dangers, including contamination from rain, snow or debris on the ground and also poses a risk of tampering or damage. Option A, B, and C are all too close to the ground to provide adequate protection and proper air flow. Option D at 12 inches ensures that the fresh air supply is high enough to avoid these potential hazards.