Pipe Drain/Vent Units

Question 1

1 1/4” Pipe
Max units on 11/4” Drain:
Max units on 11/4” Vent:
Trap-Vent Distance:

Answer 1

Max units on 11/4” Drain: 1 Unit
Max units on 11/4” Vent: 2 Units
Trap-Vent Distance: 2’ 6”

Question 2

1 1/2” Pipe
Max units on 11/2” Drain:
Max units on 11/2” Vent:
Trap-Vent Distance:

Answer 2

Max units on 11/2” Drain: 2 Units
Max units on 11/2” Vent: 10 Units
Trap-Vent Distance: 3’ 6”

Question 3

2” Pipe
Max units on 2” Drain:
Max units on 2” Vent:
Trap-Vent Distance:

Answer 3

Max units on 2” Drain: 6 Units
Max units on 2” Vent: 24 Units
Trap-Vent Distance: 5’

Question 4

2 1/2” Pipe
Max units on 21/2” Drain:
Max units on 21/2” Vent:
Trap-Vent Distance:

Answer 4

Max units on 21/2” Drain: 12 Units
Max units on 21/2” Vent: 36 Units
Trap-Vent Distance: No Max

Question 5

3” Pipe
Max units on 3” Drain:
Max units on 3” Vent:
Trap-Vent Distance:

Answer 5

Max units on 3” Drain: 36 Units
Max units on 3” Vent: 72 Units
Trap-Vent Distance: 6’

Question 6

4” Pipe
Max units on 4” Drain:
Max units on 4” Vent:
Trap-Vent Distance:

Answer 6

Max units on 4” Drain: 172 Units
Max units on 4” Vent: 240 Units
Trap-Vent Distance: 10’