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A vent connected to a fixture on the house side of the fixture trap and independent of the sanitary drainage system is known as?

  1. Indirect vent

  2. Local vent

  3. Common vent

  4. External vent

The correct answer is: Local vent

The term used to describe a vent connected to a fixture on the house side of the fixture trap and independent of the sanitary drainage system is a local vent. This type of vent serves to equalize pressure and prevent the siphoning of water from the fixture trap, helping to maintain proper drainage while also keeping sewer gases from entering the home. Local vents are specifically designed for individual fixtures, making them distinct from other types of vents that may connect multiple fixtures or be part of a larger drainage system. This type of vent is particularly useful in situations where fixtures are located far from existing vent stacks or where plumbing configurations require localized air circulation. Understanding the role of local vents can help clarify plumbing design and installation best practices, ensuring compliance with building codes and proper functionality of the plumbing system.