Question

Are parallel vent stacks required for drainage stacks that extend above the building drain?

1) Yes
2) No

Answer 1

Yes, parallel vent stacks are required for drainage stacks that extend above the building drain. They help maintain proper pressure and allow for the smooth flow of wastewater.

Step-by-step explanation:

Yes, parallel vent stacks are required for drainage stacks that extend above the building drain. A vent stack is a vertical pipe that allows air to enter the drainage system and prevent water from being siphoned from the traps. It helps maintain proper pressure and allows for the smooth flow of wastewater.

Without parallel vent stacks, there is a risk of creating a vacuum in the drainage system, which can lead to issues such as slow drainage, gurgling sounds, and sewer gas odors. By having parallel vent stacks, air can enter the system and maintain proper venting and drainage.