Island Vents, Vent Stacks

Question 1

When are island vents permitted

Answer 1

For fixtures that are installed where there is no direct access to the adjacent wall for the venting of the fixtures in a normal matter

Question 2

What must happen to a stack vent serving a went vent stack that is over 4 stories high

Answer 2

Shall extend the full size to outside air

Question 3

What is reccomended for sizing of island vents

Answer 3

Increase to same size of drain for cleaning purposes

Question 4

Where does a vent stack connect to a soil or waste stack

Answer 4

Connects at the upper end to a vent header or terminates to outside air,

And connected to the soil or waste stack at or below the lowest soil or waste pipe connection

Question 5

When is a vent stack required

Answer 5

Every soil or waste stack that receive discharge from more than 4 stories requires a vent stack

Question 6

When can fixtures be connected to a vent stack

Answer 6

-Does not exceed 8 fixture units
-All fixtures located in the lowest story

Question 7

What is the minimum size of a vent stack

Answer 7

Shall not be less than one half of the size of soil or waste stack at it base