Fixing Common Tap Problems: When to Call a Plumber
A tap that drips through the night, suddenly loses pressure or leaves water around its base is more than a minor irritation. Fixing common tap problems – what’s wrong and when to call a plumber – starts with recognising whether you are dealing with a simple worn part, an installation issue or a leak that could damage your property.
Many tap faults are straightforward for a competent plumber to diagnose, but the visible symptom is not always the real cause. A drip may be a worn washer, for example, yet it can also point to a damaged valve seat or cartridge. Taking a measured approach helps you avoid unnecessary disruption, prevent water damage and make an informed decision about when professional help is the sensible option.
Start with the symptom, not the tap
Before taking anything apart, establish exactly what the tap is doing and when. Does it drip only after use, run continuously, make a noise when turned on, or leak only when the handle moves? Is the issue affecting one fitting or several taps around the property?
A fault affecting a single tap is often local to that fitting. If the pressure has dropped at every tap, the cause may be elsewhere, such as an issue with the incoming supply, a stopcock that is not fully open, or a problem with the plumbing system. This distinction can save time and prevent an unnecessary replacement tap being bought.
It is also worth identifying the style of tap. Traditional pillar taps commonly use a washer and valve mechanism, while many modern mixer taps use ceramic cartridges. Monobloc kitchen taps may contain flexible hoses, seals and a diverter, particularly where they have a pull-out spray head. The correct repair depends on the parts inside, not simply on the tap’s appearance.
A dripping tap
A drip from the spout is usually caused by a component that no longer creates a watertight seal when the tap is turned off. On older taps, this is often a flattened or split rubber washer. On ceramic disc taps, the cartridge may be worn, cracked or affected by grit and limescale.
If the tap only needs a washer or cartridge, repair can be a proportionate and cost-effective solution. However, the work still requires care. The water supply should be isolated before the tap is dismantled, and the replacement part must match precisely. A cartridge can look similar to another model while having different splines, dimensions or water inlets.
Limescale is a frequent factor in hard-water areas. It can prevent moving parts from seating properly and may damage seals over time. Cleaning an accessible aerator or showerhead is often manageable, but forcing seized tap components can crack the body, damage the worktop or turn a small repair into a larger job.
Call a plumber if you cannot isolate the water, the tap body is corroded or seized, the drip continues after an appropriate replacement part has been fitted, or water is escaping beneath the sink. A professional can assess whether repair remains worthwhile or whether a new tap would offer better long-term value.
Water leaking from the base or beneath the sink
Water gathering around the bottom of a tap generally suggests a failed O-ring, seal or internal component. In a kitchen, it may also come from the flexible connections below the worktop. In bathrooms, water can travel along pipework or the tap body, meaning the visible wet area is not necessarily where the leak began.
Do not ignore a slow leak in a vanity unit or under a kitchen sink. Timber cabinets, flooring, plasterboard and electrical items stored nearby can all be affected by persistent moisture. Check carefully with a dry cloth after running both hot and cold water, but avoid tightening connections excessively. Over-tightening can damage threads, crush seals and create a more difficult repair.
A plumber should investigate any leak that appears inside a cupboard, behind a basin pedestal, beneath a bath or through a ceiling. These locations can conceal damage and often require access that is difficult to achieve without disturbing fittings. Prompt attention is particularly important where water is close to electrical sockets, appliances or lighting.
Poor flow or uneven water pressure
Weak flow from one tap is commonly caused by a blocked aerator – the small mesh fitting at the end of the spout. Limescale, debris from pipework or particles released after local water works can restrict it. If the aerator can be removed without force, it can be rinsed and cleaned, then refitted.
If both hot and cold flows are weak at one mixer tap, an internal blockage or restricted flexible hose may be responsible. If only the hot side is affected, the issue may relate to the hot-water supply rather than the tap itself. The same applies in reverse for cold water.
Where low pressure affects several outlets, avoid assuming that every tap needs replacing. A qualified plumber can trace the issue through the system and identify whether it is connected to isolation valves, pipework, pressure-reducing equipment, a pump or the wider supply. In some homes, particularly older properties, improving flow may involve more than a tap repair.
Noisy taps, banging pipes and stiff handles
Whistling, screeching or chattering when water runs can be caused by a worn washer, a partially closed valve, high pressure or loose pipework. A bang when a tap is turned off quickly may be water hammer, where moving water stops abruptly and sends a pressure shock through the pipes.
A stiff handle can result from limescale or a cartridge that is beginning to fail. It may be tempting to use more force, but this can damage the handle, spindle or ceramic mechanism. If a tap is difficult to operate, especially in a household with children, older residents or anyone with reduced hand strength, arranging a repair early is usually preferable to waiting for it to fail completely.
Pipe noises warrant professional advice when they are persistent, severe or accompanied by visible movement, leaks or changes in water pressure. The solution might be as simple as securing pipework or replacing a valve, but the cause needs to be properly identified first.
Safe checks you can make before booking a plumber
There are a few sensible observations that can help you describe the problem clearly. Do not dismantle a tap unless you are confident you can isolate the supply and refit it correctly.
- Check whether the fault affects hot water, cold water or both.
- Look for moisture around the base, pipe connections and inside the cupboard below.
- Run nearby taps to see whether the pressure problem is isolated or widespread.
- Note when the issue began, particularly if it followed plumbing work, a supply interruption or freezing weather.
Photographs of the tap and any affected area can also be useful when discussing the job. A clear description helps a tradesperson arrive prepared with the likely parts and tools, although a proper diagnosis may still require an inspection.
When a repair becomes a replacement decision
Replacing a tap can make sense where it is heavily corroded, repeatedly leaking, difficult to source parts for or no longer suited to the room. However, replacement is not automatically the best answer. A well-made tap with an available cartridge or seal may have many years of service left, while a new fitting must be compatible with the existing pipework, sink or basin and water pressure.
Consider the practical details before choosing a new tap. A kitchen mixer with a tall spout may not fit beneath wall cupboards, and a high-pressure tap may perform poorly on a gravity-fed system without suitable pressure. Basin taps also need to match the number and spacing of tap holes. A plumber can advise on compatibility and install the fitting without compromising seals, pipe connections or finishes.
Choosing professional help with confidence
Tap repairs are small jobs only in appearance. The quality of the work affects water efficiency, the risk of hidden leaks and the lifespan of the fitting. Ask a plumber to explain the likely cause, whether repair or replacement is recommended, what parts are needed and whether the quoted work includes testing for leaks afterwards.
A professional should be clear about the scope of work and let you know if an underlying issue is discovered. Choosing a reputable, accountable tradesperson is especially valuable where pipework is concealed or the leak has affected cabinets, walls or flooring. Members of the Guild of Master Craftsmen demonstrate a commitment to workmanship, professionalism and customer service.
A prompt repair can protect your home from a much larger problem. When the cause is uncertain or water is escaping where it should not, search Find a Craftsman by trade and postcode to find a trusted local plumber.
