RepairUpdated June 20, 2026
Old bathrooms in Clarendon Hills homes often hide plumbing issues waiting to be uncovered. Aging pipes, corroded drains, and fixtures nearing the end of their lifespan are all common in our area, especially in homes built 50 or more years ago. If you're considering a bathroom remodel, the plumbing should be your first concern, not just the visible fixtures, but the network of pipes, shutoffs, drains, and vents that make a new bathroom work smoothly.
Why Older Clarendon Hills Homes Need Extra Plumbing Planning
Most homes around Clarendon Hills are single-family houses built before the 1970s. Many have original galvanized supply lines or cast iron drain pipes. Over time, these materials corrode and restrict water flow. We've seen plenty of bathroom remodels derailed by the discovery of rotten pipes behind tile or under slab floors. It's common for us to find outdated clay-tile sewer lines near older homes, which can be brittle or blocked by tree roots, especially given our local soils and mature trees.
Key Plumbing Elements to Address Before Remodeling
Before you start picking out tile or vanities, here are the main plumbing components we recommend evaluating and possibly upgrading during a remodel:
- Water supply lines: Check for galvanized or aging copper lines. Pitting, scale, and leaks are frequent in older metal pipes. Upgrading to modern PEX or copper now is less disruptive during a remodel.
- Drain and vent piping: Many older bathrooms have cast iron or even clay drains. These clog, rust, and can start to leak. PVC is the current standard for new work.
- Main shutoff valve: If your main shutoff is stuck or buried behind a wall, consider relocating it with an accessible, reliable valve.
- Shower and tub valves: Leaky, outdated valves waste water and can be tough to match with new trim kits.
- Fixture supply stops and hoses: Replace old, seized angle stops and flexible hoses to prevent leaks under new sinks and toilets.
Hidden Problems We See During Bathroom Remodels
Once demolition starts, surprises often pop up. We often find corroded shut-offs, improper slopes in drains, or amateur repairs tucked behind old walls. Some bathrooms still vent into attics instead of through the roof, which is a code issue. Soggy subfloors from hidden leaks or slow draining tubs also show up in the older ranches and bungalows around Clarendon Hills.
The clay and loam soils in this area can put extra pressure on underground pipes, increasing the risk of slow drainage or backup, especially if the main bathroom shares a line with other fixtures. If you suspect roots in the line, scheduling a professional sewer line inspection before you remodel is smart.
Steps to Take Before Finalizing Bathroom Design
- Have a licensed plumber inspect all exposed and concealed bathroom plumbing.
- Assess the water heater's capacity (see more on water heater service) to make sure it can handle new fixtures like soaking tubs or multiple heads.
- Plan fixture locations with drain slope in mind. Moving a toilet several feet from its original spot is possible, but adds cost and complexity due to venting and slope requirements.
- Replace any suspect or original shutoff valves, supply lines, or old P-traps.
- Determine if your bathroom remodel will trigger local permit requirements or mandatory plumbing upgrades.
Must-Consider Upgrades for Lasting Value
While you're remodeling, it's worth making small changes that will prevent future headaches. Swapping out corroded supply lines as part of a whole or partial repipe will keep water quality high. Upgrading fixtures is more than cosmetic, the right valves and hoses prevent leaks, lower water use, and last decades longer. If persistent leaks or water damage are a concern, professional leak detection helps catch hidden problems before new finishes go in.
Drain or sewer issues should be handled before you finish tile or install that new tub; nobody wants to dig back into a fresh remodel to fix a root-damaged clay pipe later. If you're swapping out a shower, adding body sprays, or replacing an old tub with a walk-in, tie it all to a professional fixture installation plan for the best results.
Clarendon Hills Climate and Plumbing Longevity
Our local winters are hard on pipes, with repeated freeze-thaw cycles each year. Any plumbing routed through exterior walls, crawlspaces, or unheated areas must be insulated and properly sloped to prevent freezing and burst pipes. Remodels are the perfect time to address these points, especially for older Cape Cod or ranch plans common in this part of DuPage County. With local water running moderately hard, consider installing shutoff valves with longer lifespans and clean-out access for easier future drain cleaning.
Every successful bathroom remodel starts with solid plumbing work behind the walls and under the floors. Our crew at Clarendon Hills Plumbers is ready to help you plan, troubleshoot, and install the right piping and fixtures for your home. Call us at 630-526-6231 to schedule a consultation or get honest answers about your bathroom project.