A "common sewer line" (often called a main sewer line or lateral) is the primary underground pipe that carries all wastewater away from a building, connecting interior drains to a municipal sewer system or septic tank.
Putting it all together
In many neighborhoods, the answer to “Does every home have a sewer line?” is yes, but with some major exceptions. Homes in remote, rural, or older areas might connect to a septic system or use off-grid toilets that operate independently of municipal infrastructure.
PVC (Polyvinyl Chloride) is the most widely used material in residential sewer line installations today – and for good reason. It's durable, lightweight, cost-effective, and meets or exceeds most local plumbing codes.
A main sewer line is the primary pipe that connects all the drain lines in your home to either the municipal sewer system or your septic tank. This sewer pipe typically runs from your house's foundation, through your private property, and connects to the public sewer at the street or to your septic system.
There are three main types of sewer systems: Sanitary, stormwater and combined. Sanitary sewer systems handle wastewater, and stormwater sewer systems handle stormwater.
Sewer Lines Are Larger in Circumference Than Drain Lines
Because it has to take all the waste from all the fixtures in your home, and some or all of your fixtures might be working at the same time, the sewer pipe is larger in circumference than your drain pipes. A typical sewer pipe is about 4 inches around.
3 Plumbing Pipe Materials You Don't Want In Your Home
Unless your house is on a combined drains system, it needs separate drain connections to collect wastewater and rainwater.
To clear a main sewer line clog, use an industrial-strength chemical main line opener (like Green Gobbler Main Line Opener or Instant Power Main Line Cleaner), or physically clear the blockage using a motorized drain auger (sewer snake). For severe blockages or tree roots, an auger is the most effective solution.
Sewer lines generally last between 50 and 100 years, largely depending on the pipe material and environmental factors. Older homes with aging infrastructure may require repairs sooner.
When people refer to "old sewer pipes," they most frequently mean Orangeburg pipe. However, depending on the age of your home, your plumbing system may consist of other legacy materials.
PMRs for malignancies of the stomach, kidney, brain, and lymphopoietic system were also elevated, especially among plumbers. Chronic rheumatic heart disease, emphysema, liver cirrhosis, and all external causes of death were the major non-cancer causes with significantly elevated PMRs.
Leaks and Fittings Issues
PEX plumbing uses fittings and connectors that are typically made of plastic or metal. Over time, these fittings can loosen, leading to leaks. Problems can arise with crimp rings, as improper use of a crimping tool can weaken the joints.
Key Takeaways. Standard homeowners insurance may only cover sewer line damage caused by sudden, accidental perils such as fire, explosion, or impact. Gradual wear, root intrusion, corrosion, or poor maintenance are typically excluded from standard policies.
Yes, shower water goes into the sewer. It flows down the same main drain line as your toilets and sinks, eventually routing to a municipal wastewater treatment plant where it is cleaned before being safely returned to the environment.
S traps are generally discouraged or prohibited because they can siphon water out, breaking the seal. Bell and drum traps are less common and may not meet current plumbing codes.
Below are four signs of a broken sewer line:
Typically, to replace a sewer line it can take anywhere from 1 to 2 days, to 3 to 5 days. In some rare cases, it may even be as quick as one day. Generally, the estimated time frame will depend on the layout of your property, your home's piping system, and the depth required to excavate.
In plumbing, the "135-degree rule" is a code standard that dictates how much a horizontal drain pipe can bend or change direction. It limits the total cumulative angle of pipe fittings before a system requires an access point (cleanout) or must be vented, ensuring proper flow and preventing chronic clogs.
Pouring salt down your drain at night is a popular DIY plumbing trick used for routine maintenance. The goal is to take advantage of the salt's coarse texture and natural moisture-absorbing properties.
If you want more earth-friendly home remedies for a clogged sewer line, combine one part baking soda with one part lemon juice or vinegar. Pour the mixture down the drain and let it sit for at least an hour before running hot tap water down the sewer line. Plumbing auger.
A straightforward yet effective approach to addressing a clogged drain pipe involves simply using hot water mixed with dish soap. This method, ideal for tackling minor blockages, leverages the degreasing power of dish soap combined with the force of hot water to dislodge and dissolve clog-causing residue.
To protect your plumbing and the environment, you should never put fats, starches, harsh chemicals, or solid waste down your drains.
Plumbers typically unclog a main sewer line using three primary methods: motorized drain augers (snakes), high-pressure water jetting, or chemical treatments. These are accessed via your property’s sewer cleanout, which is usually a capped pipe located in the yard or near the foundation.
Yes, a toilet, shower, and sink can share the same main sewer or drain line, but they must use independent branch lines that connect below the floor. Directly tying a sink or shower drain into a toilet drain behind the wall violates code and risks severe backflow and clogs.