Final answer:
The fixture connections between drainage pipes and water closets should be made with approved materials or methods to ensure proper functioning and prevent leakage.
Step-by-step explanation:
The fixture connections between drainage pipes and water closets should be made with approved materials or methods to ensure proper functioning and prevent leakage.
One common method is using PVC (polyvinyl chloride) pipe and fittings, which are widely used in plumbing systems for their durability, affordability, and ease of installation.
Another approved option is cast iron pipe and fittings, which are known for their strength and longevity.