A Fixture Trap is Vented to What?

The Purpose of Venting a Fixture Trap

Venting a fixture trap serves multiple purposes:
  • Prevent the loss of trap seal: The primary function of venting a fixture trap is to prevent siphonage or backpressure. This ensures that the water seal in the trap remains intact, blocking sewer gases from entering the building.
  • Reduce noise in the drainage system: While reducing noise is a benefit of venting, it is not the main purpose. The primary goal is to maintain the seal of the trap.
  • Prevent siphonage or backpressure to a trap: Siphonage or backpressure can lead to the loss of trap seal, allowing sewer gases to enter the building.

Importance of Trap Seals:

Trap seals are essential in plumbing systems to prevent the entry of sewer gases into buildings. If the water seal in the trap is lost, these harmful gases can seep into the living or working environment, posing health and safety risks to occupants.

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