Tips And TricksUpdated June 16, 2026
Moving a kitchen sink during a remodel sounds straightforward, but the plumbing work behind it is anything but simple. In Downers Grove, many homes, especially near downtown, still rely on older galvanized or cast iron pipes. Changing the sink location forces you to rework supply lines and drainage in ways that must meet local codes and stand up to the tough Midwest climate. Skimping on planning or cutting corners can lead to slow drains, leaks, or water damage down the line.
Why Sink Relocation Is a Big Job
When you picture a new kitchen layout, the temptation is to put the sink under a window or on an island. But the original sink was placed close to vertical drain stacks and water lines for a reason. Moving it can require tearing into walls, floors, or even slabs to reroute pipes. In neighborhoods with a mix of home ages, older clay drains and clay-rich soil make it even more important to do things right, as settling and freeze-thaw cycles add long-term stress to any plumbing work.
Understanding Your Existing Plumbing
Downers Grove homes range from post-war cottages with galvanized supply lines to newer builds with PEX or copper. Before moving anything, our team always checks pipe material, drain slope, and venting. Galvanized systems might already be near the end of their usable life and could be due for pipe repair or repiping anyway. Cast iron drains can be hard to tie into cleanly. If you're thinking about an island sink, plan for venting and a possible under-floor drain run, which sometimes requires breaking concrete in slab homes.
Key Steps for a Successful Sink Move
- Map out water lines and drains. Locate supply shutoffs, main stack, and vent pipes. Older homes might not have accessible shutoffs or code-approved venting.
- Measure slope for proper drainage. Drain pipes need at least a quarter inch per foot pitch. Too flat, and you'll get slow drains and clogs. Too steep, and solids won't clear properly.
- Plan venting to avoid slow drains and sewer gas. Vent pipes should connect within five feet of the new sink. If not, you may need an additional vent or air admittance valve.
- Upgrade supply lines if needed. Old galvanized lines often clog with mineral buildup from moderately hard Lake Michigan water. Consider copper or PEX for lasting performance.
- Seal slabs and waterproof carefully. Clay soils and a high water table in town mean water intrusion is a real risk, especially if you open up floors.
Common Pitfalls and How We Tackle Them
DIYers often underestimate how drain and venting rules affect layout options. Running a long horizontal drain under a slab or crawlspace without correct slope leads to slow draining and blockages. We see problems when DIY work fails to include a vent connection, leaving you with gurgling drains or sewer odors. Tying into older cast iron or clay tile can crack the existing pipe if not handled with care, resulting in expensive repairs. Our plumbers know how to safely integrate new PVC or ABS with older materials, using mechanical couplings and proper pipe support.
Basements with sump pits pose another issue. Added water from a relocated sink can tax an older sump system. If your project changes how water reaches the sump pit or main drain, make sure your sump pump and check valve can handle the new load.
Don't Overlook Drain Cleaning and Leak Risks
Pipe debris and construction dust get into the lines during a remodel. After a big job like moving a kitchen sink, it's smart to schedule drain cleaning to keep new connections clear. Watch for any signs of slow drainage or hidden leaks, especially in older homes where walls and floors hide joints. If you notice any sudden drops in water pressure or wet spots under cabinets, get a leak detection and repair pro in quickly to avoid long-term damage.
Should You Replace Old Fixtures During the Move?
Since you're opening up plumbing anyway, many homeowners take the chance to upgrade faucets, sprayers, or even swap in a new garbage disposal. Our crew handles fixture installation as part of a kitchen remodel, which can prevent future issues. Consider installing shutoff valves under the new sink for easier maintenance going forward.
Relocating a kitchen sink in Downers Grove isn't a minor job. Our team is ready to help you plan and execute the plumbing portion of your remodel safely and up to code. If you want an experienced hand before you open up any walls or floors, call us at 331-260-0956. We know what it takes to make plumbing work for your new kitchen layout, no matter what the existing pipes look like.