Clogged drain: questions to ask before you hire

Drain, waste and vent systems are part of plumbing work; CSLB’s C-36 description covers the “proper disposal of fluid waste” and on-site waste disposal connections (CSLB C-36). This directory does not know which listed businesses do drain clearing — call and ask.

Work out where the problem is

One fixture (a single sink or tub) usually points to a branch line; several fixtures backing up can point to a main line. Telling the business exactly what you see helps them give a more accurate estimate.
If sewage backs up in the lowest drain of the house, say so clearly when you call.

Questions to ask

How will you clear it, and why? Common approaches include cable machines and water jetting; ask which is planned and what it costs.
Is a camera inspection offered or suggested? If so, is it included in the price, and will you get the recording or findings in writing?
Is the price flat or by time? Ask what happens to the price if the line can’t be cleared that visit.
What if it clogs again? Ask whether there is any written follow-up policy and exactly what it covers. Don’t rely on a verbal promise.
Does the work need a permit? The City of Lancaster’s permits page says no plumbing permit is required for clearing stoppages or stopping leaks in drains, but replacing a defective concealed drain pipe is new work that needs one — check with your city or county for your address.
Is the problem in the house line or the public sewer? If the blockage is beyond your property line, ask who is responsible and who to call.

Before you pay

Verify the license (guide), ask for the estimate in writing, and follow CSLB’s advice not to let payments get ahead of the work. For a bigger repair, get more than one bid.

General information only. This directory is not a contractor and does not give plumbing advice or quotes. It does not know which listed businesses take which jobs — contact the business directly, verify its license at CSLB, and make your own decision. You contract with and pay the business directly.

Next steps

Browse Lancaster or Palmdale licensed-plumber listings, and read how to check a license on CSLB.