Plumbing codes require that manholes be provided for underground ...

[evelyn o bentley]

Plumbing codes require that manholes be provided for underground piping when when the piping _____.
 
  A) changes direction
  B) is less than 6 inches in diameter
  C) changes grade
  D) is greater than 8 inches in diameter

Question 2

Combination fittings are used _____.
 
  A) to connect horizontal drains with vertical stacks
  B) in place of sanitary tees
  C) to decrease the number of fittings needed
  D) to increase flow resistance

[komodo7]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: C

[evelyn o bentley]

Gracias!

[scikid]

Thanks for the timely response, appreciate it