Offset Relief Vents

Question 1

An offset relief vent is not required when the horizontal offset in the stack is

Answer 1

1500 mm or less

Question 2

The recommended connection height of an offset relief vent to the vent stack is

Answer 2

1000 mm above finished floor

Question 3

In An offset relief vent installation, where is the upstream relief fan connected to the stack

Answer 3

To the upper vertical section of the stack immediately above the offset

Question 4

In an offset relief vent installation, where is the downstream, relief and connected to the stack

Answer 4

Any of the above

Question 5

The size of an offset relief fence, serving a 6 inch soil stack would be

Answer 5

2 inches

Question 6

The number of stories, the upper vertical section of a stack needs pass through in order to require an offset relief vent is

Answer 6

More than two stories

Question 7

Horizontal offset in a 4 inch foil stack has is 2000 mm in length, the upper vertical section of the stack is five stories, high and receives a discharge of 145 FUs. Does this offset require an offset and if so what would be the minimum size

Answer 7

Yes, 1 1/2”

Question 8

How many fixtures are permitted to be discharged into an offset relief vent?

Answer 8

2