Tips And TricksUpdated July 15, 2026
If you're updating a bathroom in one of Clarendon Hills' older homes, moving plumbing for a new layout brings its own set of challenges. Many houses in this area were built between the 1950s and 1970s with original supply and drain lines still in place. Changing the footprint isn't as easy as just shifting a sink or tub. It takes careful planning to get water, waste, and vent lines relocated and up to code, especially with decades-old pipes and unpredictable surprises behind the walls.
Why Layout Changes Get Complicated in Local Homes
Bathroom remodels in Clarendon Hills often involve dealing with galvanized steel supply lines or cast iron drains, both common in homes built here in the mid-20th century. These materials corrode and clog over time. The clay and loam soils under most of our town's homes can also cause slow drains, especially if you're re-routing fixtures. Replacing or moving plumbing in a 60-year-old house isn't just about cutting and capping. Sometimes we see clay-tile sewer lines or drain pipes that tie into cast iron branches, making adjustments tougher if you want to relocate a toilet or add a walk-in shower.
Assessing Existing Pipes Before You Move Anything
Before you start moving fixtures, it's important to know what's already in your walls and under your floors. Many older Clarendon Hills homes still have original piping prone to leaks and buildup. If you're planning a big shift, say, swapping a tub for a shower at the opposite end of the room, expect to run new supply and waste lines. We recommend a thorough inspection so you can tackle any necessary pipe repair or repiping at the same time as layout changes. This helps prevent future headaches once walls and floors are finished.
Key Steps in Moving Bathroom Plumbing
- Map Out New Fixture Locations: Mark where the new toilet, sink, shower, or tub will sit. Measure carefully, drains and supply lines need specific clearances.
- Shut Off Water and Power: Always turn off the main supply valve and any affected circuits before you start opening walls or floors.
- Check Main Drains and Vents: Toilets and showers require venting through the roof or exterior wall to prevent trap siphoning. You may need to add or move vent pipes.
- Install Correct Slope for Drains: Drain pipes must slope at least 1/4 inch per foot for reliable flow. Flat or back-graded pipes cause chronic clogs.
- Use the Right Materials: Replace any old galvanized or corroded lines with copper or PEX for supply, and PVC or ABS for drains. This ensures reliability and meets current code.
- Pressure-Test New Work: Before closing up your walls or floor, test all new joints and pipes for leaks.
Common Trouble Spots in Clarendon Hills Remodels
Homes in our area often surprise people with hidden issues when moving bathroom plumbing. Long-standing corrosion inside galvanized supply pipes can limit water pressure to your new fixtures. Cast iron and clay-tile drains sometimes crack or clog during demolition. Old homes might have insufficient venting, especially when adding a double vanity or relocating a toilet. If your floor framing runs perpendicular to the new drain route, notching or drilling incorrectly can weaken joists or break code. Mold or past water damage inside wall and floor cavities is another risk. Tackling these problems means coordinating new plumbing runs with a licensed crew familiar with older local construction.
Drainage and Sump Considerations
Clarendon Hills has flat terrain and a moderate water table. Some homes experience slow drains or basement seepage, especially after heavy storms. If you're rearranging a basement bathroom or adding one, assess your sump pump system and tie new drains into your existing sump pit or ejector pump if necessary. Basement bath remodels may need a new check valve or a lift pump for below-grade drains. Keeping an eye on proper grading, reliable trap arm lengths, and air admittance valves helps prevent sewer gas and backups.
When to Plan for Full Replacement
If your new bathroom layout means running new supply or drain lines more than a few feet, or cutting into old branch lines with scale and rust, it's often smarter to replace rather than patch. Full repiping can add up-front cost, but it avoids repeated future repairs. If your water pressure drops or you notice water discoloration, aging galvanized pipes may already be past their service life. Replacing with copper or PEX gives you better flow and clean water.
Other Details to Plan For
Don't overlook code requirements and practical details. All new fixture installations, including shower valves, faucets, and toilets, must be installed with proper shutoffs and tested for leaks. We handle faucet and fixture installation that meets Illinois plumbing codes. If your project involves a new bathroom on a slab or in a tight crawlspace, excavation for drains can add time and complexity. It's also the right time to inspect for active leaks. You can schedule leak detection and repair before you close up new walls or floors. For upgrades like tankless water heaters or moved hot water supplies, check if your current equipment is up to the job. See our water heater services if you need advice.
Planning a bathroom remodel with a new layout isn't always straightforward in a Clarendon Hills home, but with the right crew and a careful plan, you can get great results. Our team can walk you through pipe evaluation, new layout design, and code requirements so your project runs smooth from start to finish. Call us at 630-526-6231 if you want local expertise you can trust to get it done right.