How to Determine the Location of a Drain Clog

How to Determine the Location of a Drain Clog

Everyone faces a clogged drain once in a while. Most homeowners use methods like baking soda and vinegar or a plunger to clear the drains. But what if the drains are still clogged after you’ve attempted every home remedy for the problem? At SPS Plumbers, we recommend that you call a professional to thoroughly inspect your drainage system and determine the true cause of the problem. However, some property owners want to know where the clog is located before they call the plumber. Here are a few steps that will help you determine that.

  1. Determine Where the Problem Exists 

To find the true location of the clog, you need to determine where drainage is slow and which areas of your property are affected. We recommend that you start from the top of your home and observe the drainage of every sink, bathroom, and toilet present carefully. You’ll notice that water in some areas drains faster than others. Here’s what this means:

  • If the drainage in upper levels of the house is slow but the drainage in the lower levels of the house is faster, you can assume that the clog is in the upper level plumbing system. In this case, you don’t have to worry about sewer clogs.
  • If the drainage in upper level of the home is faster while the pipes in lower levels drain slowly, the plumbing system in the lower level is clogged. This can mean that a single pipe in the kitchen or lower level bathrooms is clogged or there’s a problem with the sewer.
  • If water drains well in all places but backs up and clogs in a particular sink or toilet, you can safely assume that the clog is in that particular fixture and not the plumbing system.
  1. Determine If There’s a Sewer Clog 

Sewer blockages are an expensive plumbing problem but it’s a good idea to get them repaired as quickly as possible. The longer you allow the clog to exist, the most likely it is to damage your plumbing system and cause problems like flooded basements. You can determine whether there’s a clog in the sewer system by checking every drain in the lower levels of the house. If all of them are slow to drain, it’s likely that there’s a massive clog in the sewer. However, if drains near the sewer lines run quickly and don’t appear to have any clogs, it’s likely that the sewer isn’t clogged either.

If there’s a problem with the kitchen sink drain or even the toilet, you can use the drain auger to address it but if there’s a problem with the sewer line, you should hire a professional immediately. They’ll inspect the system with drain cameras and specialized equipment to determine the true location of the problem. They can provide a full report on the clog and recommend repairs to clear the clog. Once the sewer is repaired, your drains will run smoothly.

If you need professional plumbing services or want a free no-obligation quote, just get in touch with us at SPS Plumbers. Our number is 02 9002 7332 and our email is You can also fill in the contact us form and we’ll get back to you as soon as possible.

DIY Clog Removal Guide