Leaking Faucet: Why it Happens and How to Permanently Solve the Problem

Where Does the Drip Actually Come From?

Before repairing, it's essential to understand exactly where the water is coming from. There are three typical places for a drip, and each has its own cause.

If water drips from the faucet's spout, the problem is inside the faucet: the cartridge, tap handle, or gasket no longer seals tightly. If water seeps out from under the handle or the faucet body, the body seals are worn. If water collects around the base of the faucet on the sink, the problem is with the installation fittings or the faucet base.

• Spout drips – cartridge or tap handle does not seal properly
• Seeps from under the handle – body O-rings are worn
• Faucet base is wet – installation connection or base seal leaks
• Drip appears only on the hot water side – often limescale or a heat-expanded seal

Five Most Common Causes

The first and most frequent cause is a worn rubber gasket. In old valve faucets, the tap handle presses the gasket against the valve seat; over the years, the rubber hardens, cracks, and lets water through even when closed.

The second cause is a faulty cartridge. In single-handle mixers and faucets, a ceramic cartridge controls water flow; if its discs get scratched by limescale or sand, water will start dripping through.

The third cause is a loose tap handle or nut. Vibration and daily use loosen threaded parts, allowing water to escape.

The fourth cause is limescale and dirt. The water in Tallinn and Harjumaa is sometimes of medium hardness; mineral deposits accumulating on the valve seat prevent a tight seal.

The fifth cause is excessively high water pressure. If the faucet primarily drips at night when consumption is low and pipe pressure rises, the lack of a pressure reducer or excessively high mains pressure may be to blame.

What to Do Immediately if Your Faucet is Leaking

If the drip is small, it's not an emergency, but a few steps should be taken immediately. Place a bowl or cloth under the drip – this way, you'll hear if the dripping speeds up, and you'll protect the sink from limescale marks.

Check if the drip depends on the faucet's position. If tightening the faucet more firmly stops the drip, the gasket is almost gone – this is a clear sign that the part needs to be replaced soon.

If water seeps from under the handle or body, close the angle valves under the faucet or the apartment's main valve until you can make repairs. Do not leave a leaking faucet unattended over the weekend – a small leak can unexpectedly escalate.

• Place a bowl underneath and assess the dripping speed
• Try if tightening harder helps (gasket condition test)
• Note the leak location – this will speed up repairs
• In case of a larger leak, close the angle valves or the main valve

What You Can Do Yourself and When to Call a Plumber

Replacing a simple valve faucet gasket is a job that even a handy homeowner can manage: turn off water, open faucet, remove old gasket, insert new gasket of the same size, reassemble, and test. It's important to use the correct size and not overtighten – excessive force will break faucets with ceramic parts.

Replacing a cartridge requires precision: there are dozens of types of cartridges, and the wrong model will not fit or will not seal properly. If the faucet is an expensive design model or access for installation is limited, it is more sensible to call a plumber.

It is definitely worth calling a specialist if multiple faucets are leaking at once (indicating a pressure problem), if there is a moisture stain or damaged furniture under the faucet, or if the faucet is so old that spare parts can no longer be found – then replacement is the solution.

Repair or Replace – How to Decide

The rule of thumb is simple: if the faucet is less than 10 years old and high-quality, repair is almost always worthwhile – a gasket or cartridge costs a few to a couple of dozen euros. If the faucet is cheap, rusty, or has already been repaired multiple times, replacement is more sensible.

When replacing, also consider water saving: modern faucets with aerators reduce water consumption by 30-40% without sacrificing comfort. In the long run, a quality faucet pays for itself through water bills.

If in doubt, ask a plumber to assess on site – often, upon disassembly, it turns out that repair is possible, saving you replacement costs.

How to Prevent Dripping

Do not overtighten faucets – this accelerates gasket wear. Modern ceramic faucets only require a light turn.

Clean the aerator and faucet surroundings regularly from limescale; check once a year that the installation fittings are dry. If there is no pressure reducer in the apartment and pressure fluctuates, consider installing one – it will protect all faucets, the boiler, and washing machines at once.

• Close faucets gently, without force
• Clean the aerator 2–3 times a year
• Check faucet bases and fittings once a year
• In case of high or fluctuating pressure, consider a pressure reducer