Hey neighbors – Dennis here, owner of Veteran Plumbing Services. I’ve lived and worked around Northern Virginia for years, helping folks in Fairfax County, Loudoun County, Prince William County, Culpeper County, Fauquier County, and Stafford County with their plumbing. One of the worst home problems I see (and smell!) is a sewer backup. It’s a nasty situation when dirty wastewater comes up into your home. In this post, I’ll walk you through the dangers of sewer backups, the common causes around our region, how sewer line inspections work, and some local insights. My goal is to explain it all in plain language, as if I’m chatting with you over the backyard fence. Why Sewer Backups Are So Dangerous Nobody wants sewage in their home – it’s more than just a smelly inconvenience. Let me break down why a sewer backup is a serious hazard for homeowners: Serious Health Hazards: Sewage water isn’t just dirty; it’s teeming with harmful bacteria, viruses, and possibly parasites. If you come into contact with contaminated sewer water, you risk infections or illnesses. Exposure can cause anything from stomach bugs to skin infections. In fact, experts warn that sewage exposure can lead to diseases caused by these microbes, posing serious health risks especially to kids, the elderly, or anyone with a weakened immune system​ servicemasterrestore.com . Simply put, it’s dangerous to your health. Even breathing in fumes from backed-up sewage can cause headaches or worsen asthma. Property Damage: When a sewer backup happens, water isn’t the only thing that might flood your basement or bathroom – it’s foul water carrying waste. This can wreak havoc on your property. Drywall, flooring, and wood can soak up contaminated water and begin to rot or weaken. Carpets and furniture can be ruined. Sewage water seeping into walls and foundations can cause structural damage to your home​ servicemasterrestore.com . The cost to repair this kind of damage can be extremely high (not to mention the cost of replacing personal items). I’ve seen finished basements in Fairfax completely gutted after a severe sewer backup because the materials were beyond saving. It’s heartbreaking and expensive. Mold Growth: Anytime you have wet conditions in a home, especially dirty water, you’re inviting mold. Mold and mildew thrive in the moist environment left behind by a sewage backup​ servicemasterrestore.com . It only takes 24-48 hours for mold to start growing on damp surfaces. This is a big deal because mold can damage your walls and belongings and also create additional health hazards​ servicemasterrestore.com . For example, certain molds can worsen asthma or cause flu-like symptoms in healthy people​ grandeaire.com . I’ve walked into a basement in Loudoun County a week after a sewer backup and you could already smell the musty odor of mold starting to spread. Cleaning up quickly and thoroughly is essential to prevent a minor disaster from turning into a long-term mold infestation. Foundation and Structural Issues: Beyond surface damage, sewer backups (or the underlying sewer line problems) can threaten the foundation of your home. How so? If a sewer line breaks or leaks under your yard (a common cause of backups), it can erode soil and destabilize the ground under your foundation. Saturated soil around the base of your home can lead to cracks in the foundation or basement walls. In areas with clay-rich soil (which we have a lot of in Virginia), excess moisture can make the clay expand and put pressure on foundations, or conversely, a leaking line can wash away supporting soil. Over time, this can cause parts of your house to settle unevenly. I’ve seen cases in Prince William County where a neglected sewer leak caused a slight sinkhole in the yard and contributed to a cracked driveway. While not every backup will crack your foundation, the risk of structural damage is real if problems are left unaddressed​ servicemasterrestore.com . Better to be safe than sorry. Terrible Odors and Unsanitary Conditions: I’ll add one more danger – the sheer nastiness. A sewer backup fills your home with an awful smell that can linger. The odor is not only unpleasant; it can also make your home unlivable until it’s cleaned. Plus, the area contaminated by sewage is unsanitary until properly disinfected. You definitely don’t want your kids or pets anywhere near it until cleanup is complete. The smell and mess are embarrassing and stressful – something no homeowner wants to deal with. In short, a sewer backup can damage both your health and your home in multiple ways. It’s a situation that needs immediate attention for cleanup and then a fix to whatever caused it. A flooded basement shows just how destructive a sewer backup can be – contaminated water can rise several inches or more, damaging walls, appliances, and anything in its path. Fast cleanup is critical to minimize long-term damage. Common Causes of Sewer Backups in Our Area So, why do sewer backups happen, especially in our Northern Virginia and surrounding counties? In my experience, most residential sewer backups boil down to a few usual suspects. Understanding these causes can help you prevent a backup before it ever happens: Aging Infrastructure (Old Pipes): A lot of homes in Fairfax, Loudoun, and Prince William counties were built decades ago, and many still have their original sewer lines. Most sewer pipes are built to last around 25-50 years depending on the material. After about 25 years, pipes (especially older materials like cast iron or clay tile) can start cracking, sagging, or even crumbling​ lentheplumber.com . In some older homes (1950s-60s era), the sewer line might be made of a material called Orangeburg (basically tar paper pipe) which tends to deteriorate and collapse after ~50 years. When pipes age, joints can shift or break, and the diameter can get restricted by decades of buildup. Aging, deteriorating sewer lines are a leading cause of backups because they’re more prone to blockages and collapses. If your home is older and you haven’t replaced the sewer line, it could be a ticking time bomb. (I don’t say that to scare you, but to encourage preventive care!) Tree Root Intrusion: We love our trees in Virginia – big oaks, maples, etc., make our neighborhoods beautiful. But those tree roots can be sneaky. Roots naturally seek water and nutrients, and a sewer line full of, well, nutrient-rich water is very tempting. If there’s even a small crack or loose joint in your underground sewer pipe, roots can wriggle their way in. Over time, the root grows thicker and acts like a net, catching debris until it forms a major blockage. I often find that in older neighborhoods (like parts of Falls Church or older towns in Fauquier and Culpeper), tree root invasion is behind recurring backups. It’s such a common issue that blockages from roots are listed as one of the top causes of sewer backups​ servicemasterrestore.com . If your yard or street has mature trees near the sewer line path, this is a likely culprit. One real example: a family in Stafford County kept having their drains slow down. When we sent a camera in, we saw a web of roots choking off the clay sewer pipe. It was like a scene from a horror movie in there! Removing the roots and repairing the pipe solved the issue – until those roots try to come back again. Grease and Fat Buildup: Bacon grease, cooking oil, buttery sauces – when you rinse them down the kitchen sink, they don’t just vanish. As grease cools in the pipes, it congeals into a thick, waxy substance. Over months and years, layers of grease can build up on the inside of your sewer line, eventually narrowing the pipe. This happens quite a bit in communities where people do a lot of home cooking and aren’t aware of the danger. I tell my customers: never pour grease down the drain. Even if you flush it with hot water, it can cool further down and coat the pipes. Grease buildup is often mentioned alongside roots as a common cause of blockages​ servicemasterrestore.com . In fact, grease + other debris can combine to form “fatbergs” (a gross term for big greasy blockages). Here in Northern Virginia, I’ve cleaned out lines with so much grease it looked like a candle had formed inside the pipe. The best prevention is to pour cooled cooking grease into a container and throw it in the trash, not the sink. Flushing Non-Flushable Items: Toilets are not trash cans – but you’d be surprised what we’ve pulled out of sewer lines. Items like “flushable” wipes (spoiler: they’re not really flushable), paper towels, feminine hygiene products, cotton swabs, dental floss, and even kids’ toys can cause a major clog. Unlike regular toilet paper, which dissolves, these items tend to stick around in the pipes. They can snag on rough spots or tree roots and accumulate, leading to a blockage. I’ve noticed a big uptick in problems due to flushable wipes in recent years – they’re a huge headache for homeowners and municipal sewer systems alike. Local experts always advise avoiding flushing wipes or any other non-biodegradable items​ servicemasterrestore.com . In one case out in Culpeper County, we discovered a preschooler in the house had been sending little plastic dinosaurs on a “voyage” down the toilet – it’s funny until those toys get lodged and cause a backup in the yard cleanout or, worse, into the house. The bottom line: if it’s not toilet paper (or what comes out of you), don’t flush it. Heavy Rain and Stormwater Overload: We get our fair share of heavy rainstorms and the occasional hurricane remnants in Virginia. When the ground is saturated or storm sewers overflow, that excess water can sometimes make its way into the sanitary sewer lines (through cracks, or even through basement drain connections and sump pumps). If the public sewer system gets overloaded with stormwater, it can push water back through your line and into your home. Additionally, homes that don’t have proper backflow preventers are at risk of sewage coming in from the main if the main sewer line is overwhelmed. Heavy rains and flooding are known to trigger sewer backups in many Northern VA communities​ lentheplumber.com . For instance, parts of Fairfax and Prince William counties with older sewer systems have seen backups during big storms. In low-lying neighborhoods or those near creeks, the municipal system can be hit with a sudden surge of water. If your own sewer lateral has any weaknesses (like cracks or root intrusion), that stormwater finds its way in and overloads the pipe. This is why after a big downpour, I often get calls about sewage in the basement. It’s a terrible surprise after a thunderstorm. Good drainage around the house and sometimes a sewer backflow valve can help mitigate this risk. Other Causes: While the above are the main issues, a few other things can lead to backups as well. Sometimes a sewer line can get collapsed or damaged by external forces – for example, if there’s construction or digging in your yard and the pipe is accidentally broken, or if natural ground movement (settling soil, freeze-thaw cycles in winter) cracks the pipe. I’ve seen a case in Fauquier County where heavy construction trucks driving over a yard that wasn’t properly compacted caused the sewer line to sag (a section of pipe formed a “belly” where waste collected). Also, if you have a septic system (common in more rural areas of Culpeper or Fauquier), backups can occur when the septic tank is full or the drain field is failing. (That’s a whole other topic, but I wanted to acknowledge it since not everyone in these counties is on public sewer.) The key point: anything that blocks the flow or integrity of your sewer pipe can cause a backup. Knowing these causes, you can take some preventative steps: don’t flush the wrong things, keep an eye on tree roots, consider upgrading old pipes, and be cautious with grease. But how do you know if your sewer line has an issue brewing? That’s where inspections come in. Sewer Line Inspections – Stopping Problems Before They Start If you’re like most homeowners, you probably don’t think much about your sewer line – after all, it’s buried underground, out of sight, out of mind. But trust me, that pipe is a critical lifeline connecting your home to the municipal sewer, and it’s a good idea to check on its health once in a while. One of the best services I offer (and that I always recommend to neighbors with older homes) is a sewer line inspection using a video camera. How does a sewer inspection work? Think of it like a small camera snake that we send through your pipes. We access the sewer line from a cleanout (a capped pipe usually in your yard or basement) or sometimes by removing a toilet. The camera is a tiny waterproof device with a light, attached to a long flexible cable. As I feed this cable through the sewer pipe, it sends a live video feed to a monitor. This lets me see the inside of your pipe in real time – pretty cool technology! It’s essentially a GoPro adventure through your underground pipes (not as scenic as a GoPro on a mountain hike, but important nonetheless). What am I looking for during a camera inspection? Any signs of trouble. This includes things like: Tree Roots: If roots have infiltrated, I’ll see tendrils or masses of roots poking into the pipe interior. It’s usually pretty obvious – think of roots looking like veins crawling inside the pipe. Cracks or Collapsed Sections: The camera might show a fracture line along the pipe or an outright break where the soil is visible. Sometimes I find sections that have completely collapsed or disintegrated (for example, old Orangeburg pipe can flatten out). Grease and Buildup: We can spot heavy grease buildup or other gunk narrowing the pipe. It often looks like black or brown sludge coating the bottom or sides of the pipe. Offsets or Misaligned Joints: Over time, sections of pipe can shift so that the joints no longer line up, leaving a gap or ridge inside the pipe. The camera will show if one segment has sagged or moved, which could snag debris. Bellies (Sagging Pipe): If the camera goes underwater in a section of pipe (outside of the house’s plumbing traps), it means the pipe has a dip (belly) that is holding water – a spot where debris can accumulate. Foreign Objects: I’ve found all sorts of surprises – children’s toys, lost jewelry, rocks, and of course big wads of the infamous “flushable” wipes. The camera inspection reveals these blockages, too. Sewer inspections don’t take very long – maybe an hour or two – and they let you see exactly what’s going on. I often record the video or take snapshots to show the homeowner the issues. It’s not every day you get to see the inside of your sewer! The best part is that this process is non-invasive. We don’t have to dig up your yard just to find out what condition the pipe is in. By using a high-tech camera, we can pinpoint problems and their location underground​ lentheplumber.com . How do inspections help prevent backups? Well, if we catch a problem early, you can fix it on your own schedule before it turns into an emergency. For example, if the camera finds tree roots starting to grow in, we can use a cutting tool or hydro-jet to remove them now, rather than after they’ve completely blocked the pipe. If we see a crack, you can plan a repair or pipe lining before it fully collapses on, say, Thanksgiving weekend (when you really don’t want a sewer failure!). Basically, an inspection turns a possible surprise disaster into a planned fix. Many plumbing experts (myself included) recommend doing a preventive sewer camera inspection at least once a year or every couple of years, especially if your home is older or you’ve had issues before​ servicemasterrestore.com . It’s like getting a yearly physical for your home’s plumbing – a little checkup to catch problems early. I’ll share a quick success story: A homeowner in Fairfax City called me for repeated slow drains. Instead of just snaking it and moving on, I suggested we do a camera inspection. Good thing we did – we discovered a section of the clay sewer line had a big crack on the top and was missing pieces (likely from old age). It hadn’t completely collapsed yet, but it surely would have soon. We were able to dig up and replace that section of pipe on a scheduled day the next week. A month later, that area got hit by a huge rainstorm; I shudder to think what would have happened if that pipe had given out during the storm. Thanks to the inspection, the family avoided a massive backup. They went from potentially ankle-deep sewage to totally fine, all because we caught the issue early. In summary, regular sewer line inspections are a smart investment. They provide peace of mind and often save you money in the long run by preventing catastrophic backups. If you’re buying an older home in Loudoun or Prince William, I highly recommend getting a camera inspection done as part of your home inspection process. It can reveal issues that the previous owner might not even know about. Local Factors: What Makes Northern Virginia Unique Every region has its quirks when it comes to plumbing and sewer systems. Our area – whether you’re in suburban Fairfax or out in rural Fauquier – has some local characteristics that can affect sewer lines and backups. Here are a few local factors and context to keep in mind: Older Neighborhoods, Historic Towns: Northern Virginia is a mix of the old and the new. In places like Fairfax County, there are neighborhoods from the 1950s and 60s with original plumbing, and in towns like Leesburg (Loudoun County) or Warrenton (Fauquier County), some sewer infrastructure is many decades old. Older pipes (like clay, cast iron, or Orangeburg) are common in these areas, and they are more prone to the issues we discussed (cracks, root intrusion, etc.). If you live in an older home in, say, Alexandria or Centreville, your sewer line might be approaching the end of its lifespan. The local governments do their best to maintain public sewer mains, but your private lateral (the pipe from your house to the street) is your responsibility. Knowing the age of your home and its plumbing is important. I often ask customers in older neighborhoods of Prince William or Fairfax if they’ve ever had their sewer line replaced or inspected – many haven’t and are surprised to learn the pipe might be 60-70 years old. Soil and Ground Conditions: Our region is notorious for heavy clay soil (the famous Virginia red clay in many areas). Clay soil doesn’t drain water quickly, which means during heavy rains, the ground becomes waterlogged and puts pressure on underground pipes. Clay also expands when wet and contracts when dry, which can cause pipes to shift or even crack over time. In parts of Stafford and Prince William counties, expansive clay has been known to contribute to foundation cracks – and it can do a number on rigid sewer lines too. On the other hand, some areas (particularly closer to rivers or in eastern Stafford) have more sandy or loamy soil that drains quickly, which can lead to different issues like soil settling. Additionally, Northern Virginia has a lot of rolling hills and valleys. If your house sits downhill from the street, your lateral might be deep and have more potential for groundwater intrusion. If it’s uphill, your line might be shallower but then you rely on gravity with a steeper slope (which can sometimes lead to high flow velocity that erodes pipes at joints). The bottom line: our ground conditions can impact sewer lines. It’s a good idea to be aware of your soil type. For example, if you know you have clay soil, be extra vigilant about inspections and maintenance because the soil might be slowly straining your buried pipes. Weather Patterns (Rainfall and Flooding): Virginia weather can be unpredictable. We get torrential downpours in summer thunderstorms, remnants of tropical storms in the fall, and even sudden thaws of snow in winter. Over the last decade, Northern Virginia has experienced some extremely heavy rainfall events. When a storm dumps several inches of rain in a day, it can overwhelm storm drains and sometimes indirectly overwhelm sewer systems. Fairfax County and others have programs to reduce stormwater infiltration into sanitary sewers, but no system is perfect when Mother Nature hits hard. Homeowners in low-lying areas or near streams (think parts of eastern Loudoun by the Potomac, or along Bull Run in Prince William) should be mindful of this. It’s not a bad idea to have a backwater valve installed – a device that can automatically block flow from coming back into your basement drain if the main sewer surges. Also, remember to keep your gutters and downspouts clear and pointed away from your foundation; while this is more about preventing basement flooding, it also reduces the chance of water seeping into your sewer line through any cracks. Seasonal weather is definitely a factor in sewer backups – a big rainstorm can trigger one if your system is vulnerable, as many of my emergency calls can attest. Lush Landscaping and Tree Density: We have beautiful green neighborhoods. Places like Vienna in Fairfax County or parts of Middleburg in Loudoun are known for big yards with mature trees. This scenic greenery can conceal a menace below ground: as mentioned, tree roots. The more trees (and older trees) on or near your property, the higher the chance of root intrusion. Different tree species have different root growth patterns – willow trees, for instance, have very aggressive water-seeking roots. I sometimes advise folks planning new landscaping to avoid planting trees too close to where the sewer line runs. In Stafford County, for example, I consulted on a new build where the owner luckily asked before planting a row of maples right above the sewer lateral – we moved them a safe distance away. So, our love of trees in Virginia is wonderful, but it’s wise to plan landscaping with plumbing in mind. Growing Communities and Infrastructure Strain: Northern Virginia, Fauquier, Stafford – these places have grown a lot in population. Rapid development means a lot of new connections to old sewer mains. For instance, if a large new subdivision goes up in Culpeper County, the added load can stress the existing sewer infrastructure of the town until upgrades are made. More houses also mean more cumulative grease, waste, and water flowing through municipal lines. Local utilities do upgrade systems (Fairfax County, for example, has been investing in replacing old sewer mains and improving treatment plants), but there can be growing pains. As a homeowner, just be aware that community-wide issues can sometimes trickle down (literally) to your home. If you hear about sewer work or changes in your area, that’s a good time to be extra attentive to any signs of trouble in your house (gurgling drains, etc.). Also, if you ever experience a backup at the same time your neighbors do, it could be a municipal line issue, not just your house. In that case, you should notify the county utility in addition to calling a plumber. All these local factors mean that while general advice about sewer backups applies, the specifics can vary neighborhood to neighborhood. I tailor my inspections and advice knowing, for example, that a home on a wooded lot in Fauquier might face different challenges than a townhouse in a dense part of Fairfax. The good news is that being informed about these factors helps you stay ahead of problems. A Neighborly Reminder (Conclusion) I know talking about sewage isn’t exactly pleasant dinner conversation, but I hope this guide helped shed some light (and not the smelly kind) on residential sewer backups – especially as they relate to our communities in Fairfax, Loudoun, Prince William, Culpeper, Fauquier, and Stafford counties. Being aware of the dangers (to your health and home), the common causes (from old pipes to bad habits like flushing wipes), and the value of early inspections can make all the difference in keeping your home safe and dry. As your neighbor and a plumber who’s seen it all, my advice is this: don’t wait for an emergency. Pay attention to warning signs like slow drains or gurgling toilets. Consider a preventative sewer line inspection if your home is older or surrounded by big trees. Be mindful of what goes down your drains. And if you ever do smell that telltale sewer odor or see water coming up where it shouldn’t, act quickly – turn off your water, and call a professional for help. Remember, a little proactive maintenance now can save you from a huge, messy headache later. Sewer backups are nasty business, but with the right knowledge and precautions, you can greatly reduce your risk of ever experiencing one. Feel free to reach out to me (Dennis at Veteran Plumbing Services) if you have questions or need help. I live in this community too, and I care about keeping our homes safe and our yards smelling like fresh-cut grass – not sewage! Stay safe and take care of those pipes, neighbors. Here’s to no sewer surprises in your home.