Which of the following statements is true?
a) Branch line connections to the waste stack should be connected at an angle of more than 45 degrees.
b) The stack vent prevents sewer gas from being vented through the roof.
c) The stack vent and loop vents allow equalization of pressure in the system.
d) In multi-story buildings one stack is used for venting and waste disposal.
e) Most buildings have several waste and soil stacks with each stack providing drainage for all the sections of the building.
Answer: C