Pro Flow is a plumbing business that travels to homes in Los Angeles, including the Highland Park area. Frank handles sewer stoppages, root intrusion, and blockages in the main line, and he has also done inspections before a move-in. Customers describe him showing up when a whole house is backed up, including on a Saturday or Sunday, and explaining what he finds, such as roots in the pipe. They mention clear talk about the problem and the fix, a line cleared without fuss, and the work area left clean. People who called during a storm, and again for a later sewer issue, describe him as straightforward, courteous, and easy to reach.