A slow drain is not a mystery. It is a pipe narrowing from the inside — grease in the kitchen line, soap and hair in the bathroom line, roots in the main. It keeps narrowing until water stops going down, and by then the clog has usually been building for months. Clearing it is one job. Finding out whether the pipe itself is still sound is another. We clear the line, then run a camera through it and show you what is actually inside. Sometimes the answer is a clean pipe. Sometimes it is a crack, a root intrusion, or an old line that will keep clogging no matter how many times it is cleared. You should know which one you are dealing with before deciding what to do next.