RepairUpdated July 6, 2026
Low water pressure, slow-filling tubs, and poor shower performance are common complaints across Lombard homes, especially those built several decades ago. In our experience, one problem that shows up again and again is an undersized water service line. The pipe running from the street to your house is a major factor in pressure and flow. Homes built with half-inch or old galvanized lines just aren't sized for today's fixtures, appliances, and family needs.
Why Older Lombard Homes Come Up Short
Lombard has a wide mix of houses, with many built between the 1950s and 1990s. Earlier builders often used smaller supply lines, sometimes as narrow as half an inch inside diameter, especially in older ranch or mid-century homes. Back then, there were fewer bathrooms, smaller water heaters, and less demand per home. Today, most families expect strong, reliable pressure for showers, dishwashers, laundry, and irrigation systems, all running off the same tap.
Municipal water here is treated and distributed by the DuPage Water Commission, so pressure at the street is usually fine. The weak link is usually the buried water service, especially if it's still original galvanized or even lead pipe. Both materials restrict flow over time due to corrosion or mineral scale, especially with the moderately hard water in this region.
Signs Your Water Line Is Undersized
- Loss of pressure when more than one faucet is running
- Shower slows down if a toilet flushes or washing machine fills
- Long wait for water heater recovery or slow hot water in distant fixtures
- Visible galvanized pipe at the main shutoff or meter
- Newer fixtures and appliances but no improvement in pressure
Sometimes, leaks and pipe failures also show up, especially after harsh winters. Freeze-thaw cycles in Lombard's clay-rich soil put a lot of stress on older, brittle water lines. Corrosion, rust, and scale buildup can choke off flow until the line just can't keep up.
What an Upgrade Involves
Upgrading the water service line means running a new pipe from the municipal shutoff at the parkway or curb stop all the way into your basement or crawlspace. We size new lines for today's usage, usually one inch copper or high-density polyethylene (HDPE) for most single-family homes. This gives plenty of flow for even the busiest households.
The job often involves excavation, careful planning around mature trees and landscaping, and code compliance for DuPage County. Lombard's tendency toward a high water table, especially in clay soils, can complicate digging, so planning is key. We check for obstacles, utilities, and potential drainage issues before work begins.
If you're replacing a galvanized or lead water service, this is also the time to inspect for other potential issues behind the meter. Many homeowners choose to combine water line upgrades with whole-home repiping to get rid of corroded, hard-to-access supply pipes inside the house.
Practical Benefits of a Bigger Water Line
Swapping out an undersized line has a big impact on daily life. A full-size one-inch line supplies far more gallons per minute, so you can run multiple showers, laundry, and dishes without a big drop in pressure. Modern plumbing fixtures, including high-demand tankless water heaters and multi-head showers, are designed assuming you have enough flow at the source.
Upgraded water service also protects appliances. When sediment and rust from old pipes aren't constantly flowing into your water heater, you'll get longer life from the tank and better performance. If you want to explore new water heater options as part of a project, it's easier to do both together.
We've also seen that new water lines reduce the odds of midsummer or winter emergencies. Older pipes are more likely to crack or freeze as the ground shifts with the seasons. Proactive replacement beats dealing with a burst main during a January deep freeze.
How We Tackle Water Service Upgrades
Every job is different, but there are a few basics our crew follows for Lombard homes:
- Assess the existing line's material, diameter, and route from curb stop to home
- Measure current flow and pressure at several fixtures
- Identify any code or permit requirements with the village
- Plan excavation with care for landscaping and existing utilities
- Replace the entire run with copper or HDPE sized for your needs
- Test for leaks and flush out any sediment
After the upgrade, we recommend ongoing checks for hidden leaks or pressure drops. We offer leak detection and repair if you notice any odd spikes in your water bill after new lines go in. And if you need advice about keeping your basement dry due to Lombard's clay soil or high water table, our sump pump experts can help keep unwanted water at bay.
Maintenance Tips and Next Steps
Once your main water service is up to speed, you'll get the most value if the rest of your plumbing system is in good shape. We recommend periodic drain inspections, especially if you've had slow drainage or backups. For this, our drain cleaning team is on call for local homes.
If you've noticed years of low pressure, poor water quality, or suspect old galvanized pipes anywhere, an upgraded water line is the first step toward a safer, easier-to-maintain plumbing system. Most upgrades pay off in daily comfort and future savings on emergency repairs.
Need a straightforward quote or want to discuss your Lombard home's water line options? Call us at 331-225-4014 and our team will walk you through the process. We serve the whole Lombard area and can answer any technical questions about your home's service line.