A 30-foot drain has a total fall of 7 1/2 inches. Which is the total drop?

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Study for the NOCTI Plumbing Test. Engage with flashcards and multiple-choice questions, each supported by hints and explanations. Prepare effectively for your exam!

Multiple Choice

A 30-foot drain has a total fall of 7 1/2 inches. Which is the total drop?

Explanation:
In drainage terms, fall and drop describe the vertical distance a pipe loses from start to end. If a 30-foot drain has a total fall of 7 1/2 inches, the total drop is the same amount: the outlet is 7 1/2 inches lower than the inlet. The length matters only if you’re calculating slope or drop per foot; for example, 7 1/2 inches over 30 feet equals 1/4 inch per foot. But the total drop remains 7 1/2 inches.

In drainage terms, fall and drop describe the vertical distance a pipe loses from start to end. If a 30-foot drain has a total fall of 7 1/2 inches, the total drop is the same amount: the outlet is 7 1/2 inches lower than the inlet. The length matters only if you’re calculating slope or drop per foot; for example, 7 1/2 inches over 30 feet equals 1/4 inch per foot. But the total drop remains 7 1/2 inches.

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