Drainage leading to strret is blocked.
My sub pump drains into a tube that direct the water away fom my house. The tube is buried and leads toward the gully abbout 30 feet away. Latley I water from my pump is going into the tube but the tube is backing up and over flowing and digging a hole where my pump discharges. I think the tube is blocked some how but don't know how to un block it. Any suggestions.