Brooklyn’s housing stock is one of the oldest in the country. Brownstones, row houses, pre-war co-ops, and multi-family buildings across the borough still rely on original cast iron, galvanized steel, and even lead pipe systems that were installed decades ago — sometimes over a century ago. That means leak detection and pipe repair here aren’t the same as they are in a new suburban development.
At C.I.D. Plumbing, we specialize in working with the kinds of plumbing systems that are common in Brooklyn’s older buildings. Below are the questions we hear most often about leaks, pipe condition, and maintaining aging plumbing.
Professional leak detection goes well beyond listening for a drip. At C.I.D. Plumbing, we use a combination of methods depending on the suspected location and type of leak.
The right approach depends on the situation. A water bill spike with no visible signs of a leak might start with a meter check and pressure test. A damp spot on a wall might call for acoustic detection. We’ll assess your situation and choose the most effective diagnostic method so we can pinpoint the problem without unnecessary exploratory work.
A sudden unexplained increase in your water bill is one of the most reliable early warning signs of a hidden leak. Before calling a plumber, you can do a quick check yourself.
Turn off every water-using fixture and appliance in your home — faucets, dishwasher, washing machine, ice maker, everything. Then check your water meter. If the dial or flow indicator is still moving with everything off, you likely have a leak somewhere in the system.
Common culprits behind water bill spikes include a running toilet (the flapper valve can fail silently and waste hundreds of gallons), underground supply line leaks between the meter and your building, a slow leak behind a wall or under a floor, and a leaking water heater that’s draining into a floor drain.
If your meter test suggests a leak, give us a call. We can perform a thorough leak detection assessment to find the source and recommend the most cost-effective repair. We also check whether the issue is on your side of the meter (your responsibility) or the city side (NYC DEP’s responsibility).
A slab leak is a leak in a water supply line or drain line that runs underneath or within a concrete floor slab. They’re a concern in Brooklyn buildings with slab-on-grade construction or concrete basement floors where supply or drain pipes were routed through or beneath the concrete.
Signs of a slab leak include unexplained water bill increases, the sound of running water when all fixtures are off, warm spots on the floor (if the hot water line is leaking), damp or discolored flooring, or a musty smell in the basement or ground floor.
Repair options depend on the severity and location. In some cases, we can make a targeted repair by accessing the pipe through a small section of concrete. If the pipe is old and likely to fail in other spots, rerouting the line above the slab (called a re-route or re-pipe) is often the smarter long-term solution because it avoids repeated concrete work. We’ll diagnose the leak, explain your options, and help you choose the approach that makes the most sense for your building and budget.
Yes. A water meter check is one of the first steps in our leak detection process. We can verify whether your meter is registering water flow when all fixtures are off, help you determine whether the leak is on the building side or the city side of the meter, and advise you on next steps, whether that’s a full leak detection service or contacting NYC DEP about a city-side issue.
Yes — this is a significant part of our work. Brooklyn is full of brownstones, row houses, and pre-war apartment buildings that still have original cast iron drain lines, galvanized steel supply lines, and in some older buildings, lead supply pipes. These materials were standard when the buildings were constructed, but they all have finite lifespans and common failure modes.
Our team has extensive experience with the unique plumbing challenges of Brooklyn’s older buildings — tight access points, multiple pipe materials connected together, outdated configurations, and the need to work within the structure without unnecessary demolition. We inspect before we recommend, and we’ll always give you an honest assessment of what can be repaired versus what should be replaced.
There are several warning signs that your building’s older plumbing is reaching the end of its useful life. Watch for frequent leaks or recurring issues in the same pipes. Visible corrosion, rust stains, or greenish deposits on exposed pipe surfaces. Low water pressure throughout the building, which often indicates internal corrosion and buildup in galvanized supply lines. Discolored or rusty water, especially when you first turn on the tap in the morning. Slow drains in multiple fixtures at once, which can indicate deteriorating cast iron drain lines. Water damage or staining on walls and ceilings below plumbing runs.
If you’re seeing several of these signs, a professional inspection can help you understand how much life is left in your pipes and whether spot repairs or a more comprehensive re-piping project makes more sense. We provide honest assessments — if a repair will hold, we’ll tell you. If a section of pipe is likely to fail again soon, we’ll recommend replacing it so you’re not paying for the same repair twice.
It depends on where the leak is coming from and the condition of the pipe. Many kitchen sink leaks are straightforward repairs — a worn-out slip joint connection, a corroded tailpiece, or a faulty P-trap. These are common, especially in older Brooklyn kitchens where galvanized or brass drain fittings have been in place for decades.
However, a kitchen sink leak can sometimes point to a bigger issue. If the leak is in the wall behind the sink rather than at a visible connection, there may be a corroded pipe section inside the wall. If you notice low water pressure at the kitchen faucet along with the leak, there could be a deteriorating supply line. If the drainpipe itself is cracked or heavily corroded, patching may not hold and a section may need replacement.
Our recommendation: if the leak is at a visible fitting and you’re handy, tightening or replacing the connection may resolve it. If you can’t identify the source, if it’s getting worse, or if the pipes look corroded, call us for an assessment. We’ll give you a clear diagnosis and a fair quote. For a general idea of what a small leak repair costs in Brooklyn, see our Pricing & Financing FAQ page.
