Leaks & Water Damage

Running Toilet, Dripping Faucet: Small Leaks, Real Money

Published October 29, 2026 · By the PlumbCove team

Small leaks hide in plain sight. A toilet that runs for thirty seconds every hour, a bathroom faucet that drips into the sink all night — neither floods anything, neither feels urgent, and both send treated water straight down the drain every hour of every day in Miami and Fort Lauderdale homes.

This guide puts honest scale on the waste, explains the worn parts behind the two most common small leaks, and separates the fixes a careful homeowner can do from the ones that belong to a plumber.

What a 'Small' Leak Actually Wastes

A dripping faucet loses water one drop at a time, which is exactly why it is underestimated — left for months, a steady drip adds up to hundreds of gallons. A running toilet is in another league: a flapper that no longer seals lets tank water flow continuously, and a toilet that refills itself several times an hour can waste more water in a week than the household visibly uses.

In South Florida the bill is the usual witness. If your water use climbs with no new occupants, no irrigation change, and no visible leak, check the toilets first. Utility guidance has long treated a running toilet as one of the largest single sources of household water waste, and plumbers in Miami-Dade and Broward will tell you the same from experience.

▸Toilet refills itself with no flush: the tank is leaking into the bowl
▸Water bill rising with no change in habits: suspect a toilet before anything else
▸A drip you can hear at night is a drip you are paying for around the clock

Why Toilets Run: The Three Usual Parts

Most running toilets trace to the flapper — the rubber seal at the bottom of the tank that lifts on a flush and drops to seal. Florida's treated water is hard on rubber; a flapper that is warped, stiff, or coated no longer seals, and water seeps past it until the fill valve tops the tank up again. The dye test proves it: food coloring in the tank, no flush, and color in the bowl fifteen minutes later means the seal is leaking.

The other usual suspects are the fill valve (which sets the water level and can stick or wear) and the water level itself — set too high, water simply spills down the overflow tube continuously. All three are inside the tank, visible with the lid off, and none requires touching the supply plumbing beyond the shut-off valve behind the toilet.

Why Faucets Drip: Washers, Cartridges, and Hard Water

A faucet drips because its internal seal no longer closes completely. Older compression faucets wear out a rubber washer; modern single-handle faucets use a cartridge whose seals harden and score over time. South Florida's hard water accelerates both — mineral deposits pit the sealing surfaces, so a drip often returns unless the worn part is actually replaced, not just tightened.

Tightening the handle harder is not a fix; it grinds the damaged seal further. The honest repair is identifying the faucet type, shutting off its supply valves under the sink, and replacing the washer, O-rings, or cartridge that the design uses.

The DIY Line — and What Sits Past It

Replacing a flapper or adjusting a fill valve is within reach for most homeowners: shut off the toilet's supply valve, confirm it holds, and work inside the tank. Cartridge replacement is a step up — it needs the right part for your faucet model and care with the supply shut-offs, which on older Miami homes are sometimes corroded and unwilling to close fully.

Call a pro when a shut-off valve will not close (forcing it can start the bigger leak you were avoiding), when the toilet rocks or leaks at its base (that is a wax-ring and flange problem, not a tank problem), when corrosion is visible on supply lines, or when you have fixed the same drip twice and it keeps returning — the valve seat itself may be damaged.

Getting Small Leaks Fixed in Miami or Fort Lauderdale

Do the dye test this week and note which fixtures drip and roughly how often the toilet refills. That short list turns a service visit into a single trip with the right parts on the truck.

PlumbCove connects South Florida homeowners with independent local plumbing providers for bathroom and kitchen plumbing. Request a local pro through our bathroom and kitchen plumbing page, or call 786-741-7667. You hire the provider directly — we simply make the connection.

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If the checks above point past the safe DIY line, request a local pro for Bathroom & Kitchen Plumbing — or call 786-741-7667. One request, independent local providers, you choose who to hire.

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Quick answers

How much water does a running toilet waste?

Far more than it looks like. A toilet with a leaking flapper refills repeatedly around the clock and can waste hundreds of gallons a day in bad cases — often the single largest source of waste in a home. The dye test (color in the tank, check the bowl later without flushing) confirms the leak in minutes.

Why does my faucet drip even after I tighten the handle?

Because the seal itself is worn. Tightening presses a damaged washer or cartridge harder against a pitted seat without restoring the seal, and can make the wear worse. The fix is replacing the worn internal part matched to your faucet type.

How do I get matched with a local plumber for small leaks?

Use the Request a Local Pro form on our bathroom and kitchen plumbing page or call 786-741-7667. PlumbCove shares your request with independent local plumbing providers in Miami-Dade and Broward who can contact you about the work. You hire the provider you choose directly.

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