Tips And TricksUpdated June 25, 2026
Low water pressure is a common headache in Clarendon Hills, especially in homes built 50 years ago or more. If you live in one of the area's classic bungalows or ranches, you may have noticed weak flow at showers or slow-filling tubs when more than one fixture runs. In our experience, many older properties still have half-inch or three-quarter-inch supply lines, often made of outdated materials like galvanized steel. These lines just can't keep up with modern water demands and fixtures. Knowing if your home is overdue for an upgrade can make a big difference in day-to-day comfort and protect your plumbing long-term.
Why Older Clarendon Hills Homes Run Into Low Water Pressure
The housing stock here is mostly single-family homes from the early to mid-20th century. At that time, water service needs were different, there were fewer bathrooms, smaller appliances, and less demand. Supply lines were sized for the era. Today, with updated kitchens, extra bathrooms, irrigation systems, and new water-using appliances, these old lines show their limitations. Add in decades of mineral buildup from our moderately hard Lake Michigan water, plus corrosion inside galvanized or lead lines, and it's no wonder many homes suffer water flow issues.
Warning Signs Your Water Line Is Undersized
- Noticeable drop in pressure when two or more fixtures run at the same time
- Slow-filling washing machine or bathtub
- Water temperature fluctuates during showers if someone else uses water elsewhere
- Visible old galvanized or lead pipe at your water meter or main shutoff
- Rusty or discolored water, especially after a period of inactivity
If you're dealing with these symptoms, the main supply line is often the culprit. Sometimes the problem is compounded by old interior plumbing, which can also need attention. Our pipe repair and repiping team handles both scenarios regularly.
How We Size and Replace Water Lines
Proper water line sizing depends on the total number of fixtures, the distance from the meter to the house, and current plumbing codes in DuPage County. For most modern homes, a one-inch copper or approved plastic line from the street gives the ideal flow and pressure, supporting today's appliances and bathrooms. In contrast, older half-inch or three-quarter-inch lines restrict volume severely. We inspect the whole system, check for restrictions, and recommend the right materials, usually type K copper or high-quality PEX, both resistant to corrosion and suited for the region's freeze-thaw cycles.
We also look for common issues here: clay and loam soil can shift, stressing shallow buried pipes, and repeated winters can crack old metal lines. If there's any sign of leakage or pipe movement, we'll include those repairs as part of the upgrade. For homes with basement seepage or drainage issues, we often coordinate with sump pump service work, since new water lines sometimes run close to sump pits.
Other Plumbing Upgrades to Consider
While replacing the main water supply, it's a good time to evaluate other aging piping. Many Clarendon Hills houses have original galvanized supply lines inside, which clog and restrict flow over time. Swapping these for copper or PEX can boost pressure throughout the house. Water heater supply lines and shutoff valves are another weak point in older homes. Upgrading these helps prevent leaks and improves the performance of your hot water system. Check out our water heater services for help with rusted tanks or outdated piping.
Clay-tile sewer pipes and corroded cast iron are also common in this area. If you notice slow drains along with water pressure issues, a combined inspection may be smart. Our sewer line team can advise on upgrades and maintenance while we're already exposing pipes.
Steps for a Trouble-Free Water Line Upgrade
- Locate your main shutoff and inspect exposed pipe for age and material
- Check fixtures for pressure drops and temperature swings
- Have a licensed plumber assess your current line's diameter and condition
- Review your household's fixture count and planned upgrades (new baths, irrigation, etc.)
- Get a clear written plan for trenching, permits, shutoff timing, and restoration
- Coordinate with leak detection if you suspect underground leaks before the upgrade
Choosing the right contractor is important. We stay up to date on all local codes and get the job inspected by the village. We also plan work around your household schedule to minimize any water disruptions.
Maintaining Your New Water Line Over Time
After the upgrade, a few steps will keep your new supply line in good shape. If you have a pressure-reducing valve (PRV), test it every year or so to prevent high-pressure surges. Make sure exterior hose bibs and irrigation tie-ins use backflow protection. If your water is particularly hard, check appliances and fixtures for mineral buildup and flush water heaters regularly. Proper care means your new line can last decades.
If you're tired of weak showers or slow-filling tubs in your Clarendon Hills home, call us at 630-526-6231. Our crew is ready to assess your system, plan a smart upgrade, and answer any plumbing questions you have. We're here to help you get strong, reliable water flow for years to come.