Help !!! I just finished installing piping for French Drain and decided to test it for leaks where it connects to drain which eventually leads to sidewalk. About another 30 feet from this connector to street. Well sure enough I found a leak even though I duct taped the two 3" corrugated pipes together. Even tried a little silicon, but it was so messy with the soil that I don't think it helped. So my question is what other type of connector can I try to use to connect this 3" y to the flex piping? Or should I just try spreading silicon inside the tubes and duct tape again? I tested the other two connectors you see in the photo and water is not leaking out of them. Just the connection circled in Red. 2nd photo is a coupling which I'm not sure if it will provide a better seal. You guys tell me. First time with french drain so is a small leak like this normal ? When the water really starts to flow through entire french drain during winter, will this small amount of leakage really matter? If it has sufficient volume then will it leak worse or just a small amount like it is now? FYI I used 3" solid wall (with perforations) on rest of french drain, this area had existing corrugate and that is why I had to use corrguated. I like the seal of solid wall alot better ! Thanks for any advice !!!