When a drain backs up, it’s tempting to call the first company that answers. But the best results usually come from choosing a contractor who can diagnose the issue clearly, explain options upfront, and perform the work safely—especially if the problem involves roots, grease buildup, or damaged pipes.

Use the questions below as a checklist before you schedule drain cleaning.

1) Are you licensed, insured, and bonded?

Ask what licenses apply in your area and confirm they carry liability insurance (and bonding if required). This protects you if there’s accidental property damage or if a worker is injured on the job.

2) What experience do you have with my type of drain problem?

Not every clog is the same. Inquire whether they routinely handle issues like kitchen grease clogs, bathroom slow drains, tree-root intrusion, main line backups, or venting problems. A company that can match experience to your symptoms is more likely to choose the right method.

3) How will you diagnose the cause—video inspection or other methods?

Reliable companies often use camera/video inspection to confirm where the blockage is and what’s causing it. Ask whether they offer inspection before clearing the line, especially for recurring backups or suspected pipe damage.

4) What cleaning method will you use, and why?

Request specifics on the approach (for example, hydro jetting, mechanical augering, or a combination) and when it’s appropriate. Be cautious of anyone who claims a single method works for everything without explaining the reasoning.

5) What will it cost—exactly how is pricing determined?

Get pricing details in advance. Ask whether the quote is based on footage, severity, or required equipment, and whether there are additional charges (like after-hours fees, inspection fees, or disposal fees). Request an itemized estimate or a written quote.

6) Do you guarantee the work?

Ask if there’s a service guarantee and what it covers (for example, repeat clearing if the same issue returns within a defined window). A clear guarantee is a sign the company stands behind its diagnosis and workmanship.

7) What should I expect during and after the service?

Find out what the process looks like: how they protect surrounding areas, how they verify the drain is flowing properly, and whether they’ll recommend preventive steps. For persistent or large-scale issues, ask what next steps might be (such as repairs if the camera shows cracks or heavy root intrusion).

Before you hire, it also helps to check reviews for communication quality, professionalism, and whether customers mention transparent pricing and accurate diagnosis. With the right questions—and clear answers—you’ll be in a better position to choose a drain cleaning company that solves the problem the first time.