You suspect a blockage. Before grabbing tools, confirm the problem and locate the obstruction.
: Unusual noises coming from the pipes as water struggles to pass through. The Cost of Procrastination blocked downpipes
Take a long measuring tape or a plumb line with a weight. Lower it into the downpipe from the top. Mark the depth when you hit resistance. Subtract that from the total height of the downpipe. If the resistance is at 2 feet down, the clog is near the gutter elbow. If it’s at 15 feet down (near ground level), the clog is in the underground drain. You suspect a blockage