Question

1. here we see cast-iron waste plumbing and copper drain plumbing. what is the problem? the copper drain piping is not connected properly to the stack the copper drain piping should have a bell and spigot connection copper drain piping should not be soldered the horizontal cast-iron waste pipe is split the horizontal cast-iron waste pipe is not properly connected to the stack

Explanation:

To solve this, we analyze each option:

• The first option: The image doesn't show improper connection of copper to the stack.
• The second option: Bell and spigot is for cast - iron, not relevant for copper's problem here.
• The third option: The issue isn't about soldering copper.
• The fourth option: The cast - iron pipe in the image has a visible split (crack), so this matches.
• The fifth option: The image doesn't show improper connection to the stack for cast - iron.

Answer:

D. The horizontal cast - iron waste pipe is split