TroubleshootingUpdated July 16, 2026
In Glendale Heights, most homes were built between the 1960s and 1980s. That age range brings a mix of plumbing issues any time you want to remodel or add a second bathroom. The idea of an extra full or half bath sounds great until you hit the reality of old pipes, flat terrain, and local building quirks. Our team has spent enough time in crawlspaces and basements around the western suburbs to know a second bathroom takes more than planning fixtures. It means digging into the nuts and bolts of your plumbing system and making sure the job's done right from the ground up.
Common Obstacles in Older Glendale Heights Plumbing
Many older homes here still have galvanized steel or cast iron pipes lurking in the walls or under the slab. These pipes corrode and can restrict water flow or cause unexpected leaks when you tie in new fixtures. The flat terrain and clay-rich soils in this area also mean drain lines need special attention for proper slope so wastewater moves out efficiently. If the main stack or sewer lateral isn't upgraded, you could end up with slow drains or, worse, sewage backups into your new bathroom.
Evaluating Drain and Water Supply Capacity
The first step is checking if your current plumbing system can handle another bathroom. Often, the original water lines are sized for one or one-and-a-half baths. Adding a shower, toilet, or even just a second sink might strain both supply and drain lines, especially in homes with older, narrower galvanized pipe. Assess if you need new supply lines or additional venting. Sometimes, repiping in copper or PEX is needed to prevent pressure drops when multiple fixtures run at once. For drains, it's crucial to make sure the main stack, branch lines, and sewer connection are up to code. If the house still has cast iron, inspect carefully for corrosion before tapping in new connections.
Key Steps for a Successful Second Bathroom Install
- Site selection: Choose a location near existing plumbing, if possible, to keep costs and wall/floor damage down.
- Check venting: Proper venting is just as important as drainage. Every new fixture needs an appropriate vent connection to avoid sewer gas and slow drains.
- Assess the sewer line: If your home's main drain is more than 40 years old, get it scoped for cracks or roots. Our sewer line services can help with evaluation and repairs before you close up new walls.
- Handle supply lines: If pressure is low, consider repiping or upsizing supply pipes. Tying into lines made of copper or PEX is preferred over old galvanized or polybutylene.
- Install proper shutoffs: Each new fixture should have its own shutoff valve for easy maintenance or emergencies.
- Get permits: Most bath additions in DuPage County require permits and inspections, especially for plumbing rough-ins. Do things by the book to avoid headaches during resale.
Drainage and Sump Pit Concerns
Glendale Heights' flat clay soil often means slow draining in yard lines and a higher water table. Basements and lower-level baths need careful planning for drainage. If your new bathroom is in the basement, you might need an ejector pump to push wastewater up to the main sewer line. A sump pit should be checked for capacity, and if you're worried about flooding, our sump pump services can recommend upgrades. Any time you add fixtures below grade, proper mechanical venting and check valves are a must to prevent backflow.
Fixture Choices and Installation Tips
Choose fixtures that match your existing system's capacity. Low-flow toilets and faucets help if your water pressure is on the low side, which is common in older homes with scale buildup in pipes. Make sure all new fixtures have accessible shutoff valves and that traps and vents are installed correctly, a common source of slow drains and odors. Our crew handles faucet and fixture installation for remodels, paying attention to trap seals, vent tee placement, and watertight connections. Don't forget about the water heater, if you add a shower or soaking tub, it may be time to check capacity or even plan for a new heater. Our water heater services cover sizing and upgrades.
Preventing Leaks and Future Headaches
Any new plumbing runs the risk of future leaks, especially when joined to old piping. Pressure test all new lines before finishing walls or tile. Watch for slow leaks behind walls or under floors, which are common when tying together old and new pipe materials. Our leak detection and repair team can pinpoint hidden trouble spots, so you avoid water damage down the line. Use quality materials for connections and take the time to insulate pipes in outside walls or basements, given how cold Glendale Heights winters get. A frozen pipe in a new addition can undo a lot of hard work.
If you're adding a second bathroom to your Glendale Heights home, our family-run crew can handle the job from planning to inspection. Call us at 630-381-5438 for a clear rundown of what's needed to get it done safely and up to code.