Trap Seals, Pipe Sizing, and
Venting 2026 Exam Questions
and Answers | A+ Score Assured
What is the minimum trap seal depth? - 🧠 ANSWER ✔✔2 inches minimum,
4 inches maximum.
What is the minimum slope for a 3-inch horizontal drainage pipe? - 🧠
ANSWER ✔✔1/4 inch per foot.