Why Taps Leak and How to Stop It
A leaking tap is more than a nuisance. It is a steady drip that inflates water bills, strains fixtures, and can signal a deeper problem in your plumbing system. The sound of water when no tap is running is the first clue, but the reasons vary from worn washers to high water pressure, and the fix depends on where the leak originates. Understanding the cause is the fastest way to stop it and prevent damage that leads to costly repairs.
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Common Causes of a Leaking Tap
Most leaks start inside the tap body or at the connection points. Identifying the source tells you whether a DIY repair is enough or whether a plumber should handle it.
- Worn or damaged washer: The rubber seal inside the tap handle wears out over time, letting water seep past the valve. A telltale sign is dripping from the spout even when the tap is fully closed.
- Corroded valve seat: Mineral buildup or rust damages the surface where the washer presses against, creating an uneven seal. This means replacement or resurfacing is needed, not just a new washer.
- Loose or cracked O-ring: A small rubber ring around the handle stem can wear out, causing a leak at the base of the tap or handle. Teflon tape is not a fix for a failed O-ring.
- High water pressure: Excessive pressure stresses internal components and connection joints, leading to slow drips or bursts. A pressure gauge can confirm if your home's supply is above safe levels.
- Broken cartridge or ceramic disc: In modern taps, these parts control flow. Damage means the tap must be opened and the internal component replaced entirely.
- Hard water buildup: Limescale restricts movement and wears seals faster, so regular maintenance helps extend the life of the tap.
Can You Fix a Leaking Tap Yourself?
Simple washer or O-ring replacements are usually manageable with basic tools. You will need to turn off the water supply, disassemble the tap, and swap the part. However, if the valve seat is pitted or the cartridge is cracked, a DIY fix may only be temporary. Signs that you need a professional include leaks from the pipe joint, a handle that feels rough or stiff, water that won't shut off completely, or recurring drips after a repair. A plumber can also check for high pressure or hidden damage that you cannot see. Fixing a small leak early stops wasted water and prevents the need for a full tap replacement.
Prevention and Maintenance
Inspect taps regularly for drips or moisture around the base. Do not ignore slow leaks, even if they seem minor. Replace worn washers before they fail completely, and avoid over-tightening handles, which can damage the valve seat. If you have hard water, consider a filtration system to reduce mineral buildup. When in doubt, call a plumber to assess the issue rather than risk further damage. A timely repair saves money and keeps your plumbing system running reliably.