Often, the problem isn't deep inside the pipe; it's right at the top where the gutter meets the downpipe. This is the "debris dam."
If you are standing in your living room watching a sheet of water pour off your roof while the actual drain sits dry and dormant, congratulations: you have a blocked downpipe. clearing blocked downpipes
The of your home (e.g., single-story vs. multi-story) Often, the problem isn't deep inside the pipe;
Gently tap the side of the downpipe with a screwdriver handle or a small piece of wood, starting from the bottom and moving up. A hollow sound indicates an empty pipe, while a dull "thud" identifies the location of the clog. 3. Flush with Water clearing blocked downpipes