Leak that reaches the unit below
In a condo or apartment a sink leak can show up as a stain on the neighbor's ceiling. We trace it to your sink, the wall or the shared line.
Serving Mount Prospect & nearby Des Plaines, Arlington Heights
Kitchen Sink Leak & Drain Repair in Mount Prospect, IL
Leaks under the kitchen sink in Mount Prospect traced to the source and fixed, from the strainer to the drain in the wall.
- Technicians covering Mount Prospect ZIP 60056, 60005
- Diagnosis first, then a written price for the repair
- Honest advice when replacing makes more sense
Sink leaks and drain problems we repair in Mount Prospect
Water in the sink cabinet means something is loose, cracked or worn out: a trap nut, a strainer gasket, a dishwasher hose or the drain pipe in the wall. We find which one in your Mount Prospect kitchen and repair it so the cabinet floor stays dry.
Cracked or corroded drain pipe
A pinhole or crack in the drain pipe can't be sealed for long. We replace the section with new pipe and fittings.
Leak at the drain in the wall
Water behind the sink base often starts at the wall connection. We open what we need to reach it and replace the failed fitting.
Leak only when water runs
Water under the sink only while the faucet runs points to the supply side: a valve, a connector or the faucet base. Drain leaks show up when water goes down.
Swollen or stained cabinet floor
If the sink base floor is warped and stained, it has been wet for a while. Once the plumbing is dry, the floor panel can be replaced and protected with a liner.
Drip from the trap or slip joint
Slip-joint washers flatten and dry out over the years. When a trap keeps weeping no matter how hard you tighten it, the trap assembly is replaced.
Leak right after a new dishwasher install
If the sink cabinet got wet right after the dishwasher was put in, the drain connection is the first place we look.
Musty smell under the sink
Odor can also come from a dry or unvented trap. We check whether it is a leak, a venting issue or both.
What we check and fix
- Locate the leakWater run in stages: faucet, full bowl, disposal, dishwasher drain.
- Basket strainer resealStrainer removed, cleaned and reset with fresh putty or a new gasket.
- Trap and tailpieceNew trap, washers and tailpiece in PVC or chrome-plated brass.
- Drain pipe and wall connectionThe trap adapter or drain arm at the wall rebuilt when it leaks.
- Supply side checkWe look at the stops and faucet lines too, since they leak into the same cabinet.
- Cabinet floor repairDamaged sink base floor cut out and replaced once the plumbing is dry.
- Leak testSink filled and drained, dishwasher run and every joint checked dry.
Parts we replace
PVC traps and tailpiecesPlastic trap parts that don't rust and are easy to service later.
Transition couplingsShielded couplings and adapters to join new PVC to old galvanized or cast iron.
Plumber's putty and gasketsThe right sealing material for the sink: putty, a gasket or a stain-free compound for stone.
Basket strainersStainless or brass strainers matched to the sink, set in putty or with a gasket.
Dishwasher hose and air gapParts that keep the dishwasher draining one way, into the sink drain.
Kitchens like yours in Mount Prospect: before and after
Problem
Fixed
DetailBefore and after: a 1990s two-story colonial in Mount Prospect
A 1990s two-story colonial in Mount Prospect, a typical kitchen for Mount Prospect. What we started with: solid-surface integrated sink. The reason for the call: a water-stained cabinet floor. Finished kitchen: the drain rebuilt with new fittings and a dry cabinet floor. Work included basket strainer reseal, drain pipe and wall connection, plus cabinet floor repair.
Before
AfterKitchen Sink Leak & Drain Repair in a two-story colonial from the 1990s, Des Plaines
The site: a two-story colonial from the 1990s in Des Plaines. The kitchen as it was: white double sink. The reason for the call: a wet cabinet floor under the sink. The result: the drain rebuilt with new fittings and a dry cabinet floor. On site this meant trap and tailpiece, drain pipe and wall connection, plus leak test.
Kitchen Sink Leak & Drain Repair in Des Plaines →
Before
AfterKitchen Sink Leak & Drain Repair in a 1980s two-story, Arlington Heights
This one is a 1980s two-story in Arlington Heights. The kitchen as it was: white cast-iron double sink. The reason for the call: an old drain dripping into the sink base. After: the drain rebuilt with new fittings and a dry cabinet floor. On site this meant drain pipe and wall connection, supply side check, plus cabinet floor repair.
Kitchen Sink Leak & Drain Repair in Arlington Heights →
Before
AfterMount Prospect kitchen, 1950s ranch: kitchen remodeling
Finished: cabinets in white uppers and dusty blue lowers with matte black pulls, bright white quartz counters, a terracotta-look square tile backsplash, black-and-white checkerboard tile flooring and recessed lights and under-cabinet LED strips.
Kitchen Remodeling in Mount Prospect →
Before
AfterMount Prospect kitchen, postwar Cape Cod: kitchen cabinet painting
What changed: the same doors sprayed in pale sage, new polished nickel pulls; counters and floor stayed as they were.
Kitchen Cabinet Painting in Mount Prospect →The repair visit
- Call or send a photoDescribe the leak and when it happens, and we schedule a visit.
- Find the sourceDiagnosis first, then we explain what failed and what the repair involves.
- RepairNew trap, strainer seal, hose or pipe section as needed.
- Test and dryWe confirm the repair holds and show you what to watch for.
Kitchen Sink Leak & Drain Repair questions from Mount Prospect homeowners
Can you fix water damage to the sink cabinet?
Yes. Once the leak is fixed and dry, we replace the cabinet floor or add a liner to protect it.
Will tightening the nuts fix it?
A quarter turn may stop a drip, but recurring leaks mean new washers or a new trap.
Why is my kitchen sink leaking underneath?
Most often a worn trap washer, a failed basket strainer seal, a loose dishwasher hose or a cracked drain pipe. Supply lines and the faucet can leak into the same cabinet.
Can a leaking sink cause mold?
Damp, dark sink cabinets are where mold starts. Stop the leak, dry the area and replace soaked materials.
Is it safe to keep using the sink?
Small leaks can wait a day; ongoing water damages the cabinet and floor quickly. Shut off the valves if it's the supply side.
Mount Prospect plumbing code: who can do the plumbing for sink leak repair?
Plumbing contractors need the Village contractor license plus state license. State plumbing code requires a state-licensed plumber in multi-family buildings. Our plumbing connections are made by licensed plumbers.
Can you do sink leak repair in a Mount Prospect condo?
Associations usually set rules for work hours, elevators, deliveries and insurance, and many require approval for plumbing, electrical or structural changes. We provide the certificate of insurance and follow the building's rules.
Does sink leak repair need a Mount Prospect building permit, and who files it?
Permits go through Community Development Department - Building & Inspection Services, phone (847) 870-5675. When your scope needs one, we prepare the application and schedule the inspections.
Do I need a permit for sink leak repair in Mount Prospect?
It depends on the scope. Mount Prospect's rule in short: Kitchen remodels need a permit and a code review (about 10 business days). We handle the permit when one is needed with Community Development Department - Building & Inspection Services.
Do you work in my part of Mount Prospect?
Yes. Our crews work across Mount Prospect — ZIP 60056, 60005 — and nearby Des Plaines, Arlington Heights, Elk Grove Village.
Working in Mount Prospect
- A lot of Mount Prospect kitchens date from the 1960s. We know these layouts well and what is worth keeping.
- Condo or townhome? We follow association rules on work hours and elevators and bring the insurance certificate your board asks for.
- We know how Community Development Department - Building & Inspection Services handles kitchen permits and pull them for you.
ZIP 60056ZIP 60005
Kitchen Sink Leak & Drain Repair nearby
Other kitchen services in Mount Prospect
Kitchen Sink Installation & ReplacementNew sinks, undermount and farmhouse styles.
Kitchen Faucet InstallationFaucet swaps and new pull-down faucets.
Garbage Disposal Installation & RepairDisposals unjammed, repaired or replaced, with the drain connected right.
Kitchen RemodelingFull kitchen remodels, from layout to last cabinet pull.
Kitchen Cabinet PaintingFactory-smooth painted cabinets without replacing them.