Pipe Systems & Materials Flashcards
6 cards from real Plumbing practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Pipe Systems & Materials flashcards as text
Which pipe material is most commonly used for residential water supply lines in the US?
Answer: PEX
PEX (cross-linked polyethylene) is the most widely used pipe for residential water supply due to its flexibility and ease of installation.
What is the minimum slope required for horizontal drain pipes 3 inches or less in diameter per the IPC?
Answer: 1/4 inch per foot
The IPC requires a minimum slope of 1/4 inch per foot for horizontal drain pipes 3 inches or less in diameter to ensure proper drainage.
Which pipe is rated for both hot and cold water supply lines?
Answer: CPVC
CPVC (chlorinated polyvinyl chloride) is rated for both hot and cold water supply lines, unlike standard PVC which is only rated for cold water.
What is the standard color code for cold water supply lines using PEX tubing?
Answer: Blue
Blue PEX tubing is the standard color code for cold water supply lines, while red is used for hot water.
Which pipe material requires primer before solvent cement is applied?
Answer: PVC
PVC pipe requires a purple or clear primer to clean and soften the surface before solvent cement is applied for a proper bond.
What type of fitting connects two pipes of different materials, such as copper to CPVC?
Answer: Transition fitting
A transition fitting is specifically designed to connect pipes made of different materials, ensuring a watertight seal between dissimilar pipe types.