What Every Winnetka Homeowner Should Know About Their Plumbing
There’s no place quite like Winnetka. Sixteen miles north of Chicago along the shore of Lake Michigan, it’s one of the most architecturally rich, historically deep, and frankly beautiful communities in the entire state of Illinois. The tree-lined streets, the lakefront estates, the stately colonials and Prairie-style gems — Winnetka is a place that rewards a love of real craftsmanship and enduring quality.
But here’s the thing nobody tells you when you fall in love with a 1920s Tudor or a grand Colonial Revival on a half-acre lot: underneath all that timeless beauty runs a plumbing system that is very much a product of its era. And Winnetka’s era, for a lot of these homes, is a long time ago.
At The Scottish Plumber, we work on homes across the North Shore every single week. We’ve seen the inside of century-old basements, tangled ourselves through crawl spaces built when Prohibition was still a going concern, and diagnosed more mystery leaks in plaster walls than we can count. What we’ve found, over and over again, is that Winnetka homeowners are often blindsided by plumbing issues that were decades in the making — simply because nobody ever walked them through what’s actually inside their walls.
This article is for you. Whether you’re a longtime Winnetka resident or you just moved into your first home on the North Shore, what follows is the most honest overview we can give you of what you’re likely dealing with, why it matters, and what you can do about it before a small problem becomes a very large, very expensive one.
The Character of Winnetka Housing — And Why It Matters for Plumbing
Winnetka was incorporated in 1869, which makes it older than a lot of people realize. The village grew steadily through the late 19th century as Chicago’s professional class looked northward along the lake for escape from the city’s density and heat. By the early 20th century, Winnetka had become one of the premier addresses on the entire North Shore, attracting prominent architects and wealthy patrons who built the kinds of homes that still define the village today.
What this means, practically, is that a significant portion of Winnetka’s housing stock was built between roughly 1890 and 1960 — an era when plumbing materials and methods were dramatically different from what we use today. The homes are beautiful. The bones are often extraordinary. The plumbing? That’s another story.
Newer construction exists, of course, particularly in areas where older homes have been torn down and rebuilt, or in developments that went in during the 1980s, 1990s, and beyond. But the character of Winnetka is defined by its older homes, and those are the ones that require the most attention from a plumbing perspective.
Add to this the village’s geography — a significant portion of Winnetka sits on or near a flood plain, with both the Skokie River and Lake Michigan contributing flood plain designations to various parts of the village — and you have a community that faces more plumbing complexity than most homeowners initially anticipate.
A Brief History of Plumbing in Winnetka Homes
To understand what’s in your walls and under your floors, it helps to understand when your home was built and what plumbing technology was standard at the time.
The Early Era: 1880s to 1920s
The oldest homes in Winnetka were built when indoor plumbing was still a relatively new luxury. Pipes in this era were typically made of lead — particularly the service lines that connected homes to the municipal water supply — and cast iron for drain lines. Lead was favored because it was easy to work with, malleable, and long-lasting in terms of structural durability. What wasn’t understood at the time, of course, was the health risk: lead is a neurotoxin, and water that sits in lead pipes absorbs trace amounts of the metal.
Cast iron drains from this era are still functional in many Winnetka homes — but after 100-plus years, they are reaching or exceeding the end of their useful life. You’ll often find them scaled with mineral deposits, cracked from the ground movement and freeze-thaw cycles of a Chicago winter, or infiltrated by tree roots.
The Mid-Century Era: 1930s to 1960s
Homes built during this period typically transitioned away from lead supply lines and toward galvanized steel pipe. Galvanized pipe was a significant improvement in its day — steel pipe coated in zinc to prevent corrosion. The problem is that galvanized pipe has a lifespan of roughly 20 to 50 years under ideal conditions, and conditions in the Chicago area are rarely ideal. The zinc lining deteriorates over time, and what you’re left with is bare steel that rusts from the inside out. This creates two problems: reduced water pressure as the pipe’s interior diameter shrinks due to buildup, and rust and sediment entering your water supply.
If you have a mid-century home and you haven’t had a plumber assess your supply lines, there’s a reasonable chance you’re still running water through galvanized pipe. You may have noticed the symptoms without connecting them: lower pressure at fixtures on upper floors, discolored water after periods of non-use, or a slightly metallic taste.
The Post-War and Modern Era: 1960s to Present
Homes built from the 1960s onward typically used copper supply lines, which remain the gold standard for residential plumbing in many ways. Copper is durable, resistant to bacteria, and doesn’t corrode under normal conditions. A well-installed copper system can last 50 to 100 years.
However, copper is not without its vulnerabilities. In homes with aggressive water chemistry — particularly slightly acidic water, which is not uncommon in the Chicago region — copper pipes can develop pinhole leaks over time. These leaks are notoriously difficult to detect early, because they often start inside walls or ceilings. By the time a homeowner notices water damage, a pinhole leak may have been running for months.
More recently, PEX (cross-linked polyethylene) tubing has become increasingly common in renovations and new construction. PEX is flexible, freeze-resistant to a degree (though not immune), and easier to install in tight spaces. It’s an excellent material when properly installed.
The Specific Challenges Winnetka Homeowners Face
Beyond the age of the pipes themselves, there are several challenges that are particularly pronounced in Winnetka and the surrounding North Shore communities.
1. Lead Service Lines and the Health Risk You May Not Know About
If your home was built before 1986, there is a real possibility that your water service line — the pipe connecting your home to the municipal water main — is made of lead. Lead was standard in service line construction until Congress passed the Safe Drinking Water Act amendments that banned its use in new plumbing. Illinois subsequently went further and, as of January 1, 2022, no longer allows partial replacement of lead water service lines. If any portion of your service line is lead, the entire line must be replaced.
The village of Winnetka has been working to identify lead service lines across the community, and an inventory is available through the Water & Electric Department. If you’re unsure whether your home has a lead service line, you can check the village’s records or have a licensed plumber assess the pipe where it enters your home near the water meter. Lead pipe is a dull gray color and will reveal a bright silver surface when scratched with a coin or key.
For homes with confirmed or suspected lead service lines, the Illinois EPA’s guidance recommends running cold water for several minutes before using it for drinking or cooking — particularly after long periods when the water has been sitting in the pipes — and considering a certified lead-reducing water filter for drinking water while a full replacement is planned.
2. Galvanized Pipes: The Slow Deterioration Inside Your Walls
Galvanized steel pipes corrode from the inside out over decades, and by the time external symptoms appear, the situation inside can be quite advanced. The corrosion doesn’t just reduce water pressure — it can contaminate water with rust and sediment, and in advanced cases, corroded sections of pipe can fail without warning, dumping water inside a wall cavity or ceiling.
Homes with galvanized supply lines often exhibit a telltale pattern: decent water pressure at first-floor fixtures but noticeably reduced pressure on upper floors, where the pipe diameter has been further restricted by buildup. If this sounds familiar, a plumber can assess the condition of your lines with a camera inspection and pressure testing to determine whether you’re looking at replacement in the near term.
Upgrading from galvanized to copper or PEX is one of the highest-value plumbing investments a Winnetka homeowner can make — both for the immediate improvement in water quality and pressure, and for the long-term avoidance of emergency failures.
3. Clay and Cast Iron Sewer Lines: The Root of the Problem
Below the yard and the street, connecting your home to Winnetka’s municipal sewer system, runs your sewer line. In homes built before the 1970s, that line is almost certainly made of either clay tile or cast iron. Both materials have served well for generations — but both are aging.
Clay tile sewer lines are particularly vulnerable to tree root intrusion. Winnetka’s gorgeous tree canopy — one of the village’s defining features — is also one of its most persistent plumbing challenges. Tree roots seek moisture aggressively, and the joints between clay tile sections are exactly the kind of environment they can penetrate. A small root intrusion that goes unaddressed will grow, eventually blocking the line completely or fracturing the pipe.
A professional sewer camera inspection — which runs a small camera through the line to assess its condition — can tell you exactly what you’re dealing with before a backup forces the issue at the worst possible time.
4. Basement Flooding and Sewer Backup: A Genuine Risk in Winnetka
According to the Village of Winnetka’s flood plain information, most flooding in the village is not caused by river flooding or elevated lake levels — it’s caused by flash flooding from severe storm events. During heavy rainfall, the storm sewer system can exceed its capacity, and once stormwater begins pooling on street surfaces, it creates pressure that can infiltrate the sanitary sewer system. For homes with a gravity-fed sanitary sewer connection, this creates real risk of basement backup.
The village participates in the National Flood Insurance Program (NFIP) and its Community Rating System, which can provide discounts on flood insurance premiums. From a plumbing perspective, the most effective defense against basement flooding is a properly sized and maintained sump pump system — ideally with a battery backup. In a significant storm, power outages and sump pump failures often occur simultaneously, which is precisely the worst time to be without backup protection.
For homes that experience recurring sewer backup, an overhead sewer conversion or an interior flood control system can eliminate the backup risk entirely by raising the discharge point above the level where municipal sewer backpressure can push water into the home.
5. Frozen Pipes: Chicago Winters Are Not Gentle
Winnetka sits on the southwestern shore of Lake Michigan, and while the lake moderates temperatures to some degree, it doesn’t make Chicago winters kind. The North Shore regularly sees temperatures well below zero during winter cold snaps, and this creates serious risk for any water supply pipe that runs through an unheated or poorly insulated space.
When water freezes inside a pipe, it expands with extraordinary force — enough to crack or burst even a metal pipe. The freeze itself is often invisible; the damage reveals itself when temperatures rise and the water begins flowing again, sometimes through a crack that’s developed inside a wall or ceiling. A single burst pipe can release hundreds of gallons of water in a matter of hours.
Prevention is straightforward: insulate exposed pipes in unheated spaces, disconnect and drain garden hoses before the first freeze, ensure your home’s heat is maintained at a minimum of 55°F even when you’re traveling, and know where your main water shutoff is located so you can act immediately if you suspect a freeze.
6. Hard Water and Mineral Buildup
Winnetka’s water supply comes from Lake Michigan. The water’s mineral content, combined with the chemical treatment it receives before distribution, means that over time, mineral deposits can build up inside pipes, water heaters, and fixtures. In a water heater, mineral buildup on the bottom of the tank acts as an insulating layer between the burner and the water, forcing the unit to work harder and shortening its lifespan.
A water softener or whole-home water treatment system can significantly reduce buildup, extend the life of your water heater and appliances, and improve the experience of bathing and washing.
7. Aging Water Heaters in High-Value Homes
The average tank water heater has a lifespan of 8 to 12 years. Many Winnetka homes have water heaters that are well past that mark, operating on borrowed time in basements where a failure could cause significant water damage to finished space. Tankless water heaters have become increasingly popular in Winnetka homes for their ability to provide continuous hot water on demand, their space-saving profile, and their improved energy efficiency over time.
What You Can Do Right Now: A Preventive Maintenance Checklist
- Know your home’s history. Find out when your home was built and when the plumbing was last updated. If you don’t have documentation, a licensed plumber can assess materials and approximate condition.
- Check your water service line for lead. If your home was built before 1986, find out what your service line is made of. Check the Village of Winnetka’s lead service line inventory or ask a plumber to identify the pipe near your meter.
- Flush your pipes regularly if you have confirmed or suspected lead or galvanized lines. Run cold water for at least 2–3 minutes before using it for drinking or cooking, especially first thing in the morning.
- Get a sewer camera inspection. If your home is more than 40 years old and you’ve never had one done, schedule it. It takes less than an hour and can identify root intrusion, offset joints, or buildup before they become emergencies.
- Assess your sump pump before storm season. If your pump is more than 7–10 years old, have it inspected or replaced. Make sure you have a battery backup system.
- Insulate exposed pipes before winter. Walk through unheated spaces and wrap any exposed supply pipes with foam insulation. Disconnect garden hoses by mid-October.
- Inspect and flush your water heater. If it’s between 8 and 15 years old, have it inspected. Annual flushing removes sediment and extends its life.
- Check your shutoff valves. Know where your main water shutoff is and make sure it turns freely. Test individual fixture shutoffs under sinks and behind toilets annually.
- Watch for early warning signs: drops in water pressure, discolored water, slow or gurgling drains, water stains, the sound of running water when nothing is in use, or an unexplained increase in your water bill.
- Schedule an annual plumbing inspection. A licensed plumber can assess your systems proactively, identify developing concerns, and keep you ahead of expensive failures.
Conclusion: Your Winnetka Home Deserves the Same Care It Was Built With
Winnetka’s homes were built to last — and many of them have, for a century or more. That endurance is a testament to the quality of the craftsmanship and materials that went into them. But it also means those systems have been working for a very long time, in a climate that is not gentle, through ground movement and seasonal extremes and decades of daily use.
Your plumbing doesn’t ask for much. It runs silently and invisibly through your walls and floors and yard, delivering clean water and removing waste without complaint. It will keep doing that job for years to come — if you give it the attention it deserves.
Start with what you know. Find out if you have lead pipes. Check on your sump pump before the spring rains. Get that sewer camera inspection you’ve been putting off. The homes on Winnetka’s tree-lined streets have stood for generations because people have taken care of them. Your plumbing is part of that legacy.
Take care of it.
About The Scottish Plumber
The Scottish Plumber provides 24/7 plumbing services across Winnetka and the surrounding North Shore communities. Our licensed, bonded plumbers specialize in older homes, sewer inspections, sump pump installation and backup systems, lead service line replacement, and emergency repairs. We offer financing through WiseTack and Klarna and back our work with a workmanship guarantee.
Call us anytime at the number at the top of your screen or use this easy contact form.