A clogged sewer line can not only be an inconvenience, but it can lead to backup, foul smells and expensive flooding. Good news? Maybe I can fix it myself. Whether you own a home in Philadelphia or a duplex in Kansas City, there are steps you can take yourself to tackle a mild to medium blockage. In this Redfin article, you will learn how to safely, efficiently, and (if possible) close your sewer lines without calling Pro.
Signs of clogged sewer systems
Recognizing early warning signs of a clogged sewer line can help you deal with the issue before it becomes a full-scale plumbing disaster. Common indicators include:
Multiple drains are backed up: If multiple drains in your home (for example, toilets, sinks, showers, etc.) overflow or drain, the blockage can be on the main sewer line. Gongling Noise: When you hear the noise and bubbly sounds when washing out toilets or running water, you will notice that air is trapped in a clogged sewer system. Foul odor: A strong, unpleasant odor coming from the drain (often resembles a rotten egg) is a sign that the wastewater does not flow properly through the sewer line. Low-funded water backup: Water backup in a lower-level toilet or shower when operating an appliance like a washing machine indicates a clogged mainline.
Safety precautions and preparation
Working on sewer lines is dangerous if appropriate safety measures are not in place. Always obstruct your sewer lines before starting any DIY plumbing project.
Wear protective equipment: Wear sturdy gloves, protective eyewear and rubber boots to avoid contact with sewage and bacteria. Block water: Turn off major water supplies if possible to reduce the risk of water damage and sewage overflow. Ventilate the area: Open the window or use a fan to disperse smoke and odors. Collect the Right Tools: Having the Right Equipment at Hand will streamline your processes and minimize your health risks.
Essential tools and materials
To effectively unlock sewer lines, the following tools and supplies may be required:
Pipe Wrench or Adjustable Wrench – To open and close the main sewer clean-out cap. Plumbing Auger (Drain Snake) – A cable-like tool designed to break through or retrieve clogs in sewer pipes. You probably used it in the past to interfere with your toilet. Garden Hose – To wash away loose debris. Bucket or Plastic Sheet – Catches or contain water or sewage that overflows when opening clean out. Protective gear – heavy-duty gloves, rubber boots, goggles, and perhaps a face mask. Flashlight – inspect inside the cleanout to see if there is a visible blockage.
Pro Tip: If you suspect a wide range of tree root invasion or severely damaged pipe, special tools such as a mechanical root cutter or a hydroelectric generator may be required. In most cases, these are best handled by experts.
A step-by-step guide to obstructing sewer systems
1. Find a clean out of your sewer system
Most homes have a main sewer cleanout with direct access to the sewer line. Typically, this cleanout is:
Depending on the local code, it is located near the bathroom or kitchen in the basement (some old houses) near the streets and sidewalks, just outside the foundation of the house
Tip: Cleanouts can usually be identified by round or square caps labeled “clean out” or “sewer.”
2. Carefully open the clean out
Place a bucket or sheet of plastic around the clean-out cap to catch any spills. Use a pipe wrench or an adjustable wrench to slowly loosen the clean-out cap. Stand sideways to avoid potential sewage overflows. Loosen the cap and if you want to hear or see the liquid under pressure, tighten it again and wait for it to sink before proceeding.
3. Use a plumbing auger or drainage snake
Insert the auger: Push the end of the drain snake into the clean-out until resistance occurs. Induce the auger: rotate the handle or turn on the motor (for electric snakes) to break through or latch the clog. Passing the clog: Gently move the auger back and forth to remove any debris. Pull the auger out from time to time to remove any waste that is trapped between the cables. Reinsert if necessary: Repeat the process until you can no longer feel any resistance on the line.
Pro Tip: Don’t force the cable too aggressively, if the blockage is solid or if the pipe is weakened by corrosion or tree roots, as it can damage the piping.
4. Wash off the lines
After disbanding or removing obstacles:
Attach a garden hose to the water source and slowly drain the line to flush any remaining debris. Observe the flow: If water flows smoothly through the cleanout, the clog may be cleared.
5. Test the drain
Return the clean-out cap to position. Turn on the water in multiple fixtures in your home (sinks, bathtubs, toilets) to make sure everything is drained properly. Listen to the rumbling noise, check for slower drainage and make sure the water is not backed up.
When should I call an expert?
Follow all of the steps above and if your sewer line remains clogged or notice any signs of a severe clog, you are clogged with a licensed plumber. Experts can provide:
Video camera inspection: Find and diagnose clogs that are difficult to reach and damage to structural pipes. Hydro Jetting: A powerful way to clean more stubborn or vast clogs (such as tree roots) using high-pressure water. Pipe Repair or Replacement: If the pipe is damaged beyond repair, experts can advise you on trenchless or traditional drilling solutions.
Prevents future sewer blockages
Preventive maintenance is key to avoiding backups of sewer lines and protecting property.
Avoid washing off any problem items: do not wash paper towels, baby wipes, or hygienic items. Use enzyme-based treatment: Regularly treat drains with enzyme-based products designed to break down organic waste and keep the lines clear. Monitor tree roots: If you have mature trees near the sewer system, consider doing an annual inspection to catch and deal with root invasion early. Responsibly dispose of grease: Pour cooking oil and grease the drains to allow the blockage to wrap around. Instead, use grease in the container and throw it into the garbage once it solidifies. Routine Inspection Schedule: Annual checks by professional plumbers can capture small issues before escalating.
FAQs about sewer clogged systems
Can I use a chemical drain cleaner to interfere with the sewer line?
Usually, it is not recommended. Chemical drain cleaners are corrosive to pipes and are often ineffective against major clogs. They also pose health and environmental risks.
How often do you clean your main sewer lines?
Ideally, if you have frequent clogs or old plumbing, schedule a professional inspection and cleaning once a year. Otherwise, every 2-3 years is sufficient.
Is hydrojetting safe for all sewer lines?
Hydrojets are effective and safe for most modern sewer pipes. However, if the system is very old or severely damaged, high-pressure water can exacerbate existing weaknesses. Always consult a professional first.
What happens if I can’t find a sewer clean-out?
If you are unable to find a clean-out for your property, check your home inspection report or contact your local plumber. In some municipalities, clean-outs may be located near sidewalks and streets.
Does my owner’s insurance cover the sewer boundary?
Coverage varies by policy. Some insurers will need additional riders for other insurers, including sewer line backups in their standard policies. Please check the insurance contract or contact your insurance company.
Clogged sewer lines can be stressful, but with the right tools and knowledge, many homeowners can handle small blockages. Success will involve early detection, proper techniques, and knowing when to call a professional. If your DIY effort fails or if you suspect severe damage, a licensed plumber can diagnose and fix the problem, saving you time and money. Working quickly prevents larger and more costly repairs. Follow these steps to keep your plumbing at the top layer and avoid future clogs.
