After some recent fall rain, I realized our underground pipes that drain water to the street from the downspouts were clogged with debris. I ran a hose toward the house from the street side and cleaned stuff out. Did the same on one overflowing in the back yard. Today hoping to clean the other side in the front before more rain. I bought some bladder things that squirt water from a garden hose and inflate a bit to scrub the pipes. Any other ideas? It's difficult to fit things down the spout entrance and get it to turn down the line of the pipe. I don't have a pressure washer but know there are attachments for them for high pressure hoses to flush the pipes.