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Red Seal Plumber exam prep · Canada

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Readiness CoachQuestion 3 of 5

Drainage, waste and venting

What is the main function of a plumbing vent system connected to drainage piping?

A

To carry rainwater from the roof

Review
B

To increase the temperature of wastewater

C

To balance air pressure and protect fixture trap seals

Correct
D

To replace cleanouts in the drainage system

Read explanation

Vent piping allows air to move through the drainage system. This limits pressure changes that could siphon water out of a trap or force sewer gas through its water seal.

02Understand and return
Readiness CoachQuestion review

Why this answer works

What is the main function of a plumbing vent system connected to drainage piping?

A

To carry rainwater from the roof

Review
B

To increase the temperature of wastewater

C

To balance air pressure and protect fixture trap seals

Correct
D

To replace cleanouts in the drainage system

Explanation

Vent piping allows air to move through the drainage system. This limits pressure changes that could siphon water out of a trap or force sewer gas through its water seal.

Question MapReturn to any question
  1. 1Correct
  2. 2Incorrect
  3. 3Answered
  4. 4Unanswered

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