You Call Yourself a Master Plumber? Prove ItWhat is the minimum slope for a horizontal drainage pipe 3 inches in diameter under IPC?4%Next Correct Incorrect IPC requires at least 1/4 inch per foot slope for 3-inch drains to ensure proper flow. What is the minimum slope for a horizontal drainage pipe 3 inches in diameter under IPC? 1/4 inch/ft 1/2 inch/ft 1/8 inch/ft No slope 4%
