Dripping taps and slow drains: why Belfast's water hardness matters and what you can do
A dripping tap in Belfast wastes water and money. We explain the common causes, what you can do first, and when to call us for a proper fix.
That drip is not going to fix itself
A tap that drips once every few seconds does not sound like much. But left alone, it wastes a surprising amount of water over a week, and NI Water does not charge a flat rate for nothing. More to the point, a dripping tap is nearly always a sign that something inside the tap has worn out or failed, and worn parts do not get better on their own.
We get calls about dripping taps from all across Belfast and the surrounding areas. Sometimes it is a straightforward job. Sometimes it is the first sign of a bigger problem. Either way, it is worth understanding what is actually going on inside the tap before you decide what to do next.
Why taps drip: the short version
Most taps drip for one of three reasons.
The washer has worn out. Traditional pillar taps and older mixer taps use a rubber washer that presses against a seat to stop the flow of water. Every time you turn the tap on and off, that washer takes a small amount of wear. Over time, it hardens, cracks or gets chewed up, and it no longer seals properly. This is the most common cause of a dripping tap in Belfast homes, particularly in the older terraced houses and semis across areas like the Ormeau Road, the Holylands, East Belfast and North Belfast, where original fittings have sometimes been in place for decades.
The O-ring has gone. Mixer taps, especially those with a single lever, rely on O-rings rather than a traditional washer. When an O-ring deteriorates, you often see water leaking around the base of the spout rather than from the nozzle itself. It is a slightly different presentation, but the fix is similar.
The tap seat is damaged. If the seat (the metal surface the washer presses against) has become pitted or corroded, replacing the washer alone will not stop the drip. The seat needs to be re-ground or replaced. This is less common, but it does happen, particularly in older properties with hard water deposits built up over the years.
Ceramic disc taps, which are common in more modern bathrooms and kitchens, work differently. Instead of a washer, they use two ceramic discs that rotate against each other. They are generally more durable, but the discs can crack or chip, and limescale can affect them over time.
What you can do before the plumber arrives
If the tap is dripping and you want to slow the damage while you wait for us, the most useful thing you can do is locate your stopcock and make sure you know how to turn it. If the drip worsens suddenly or you spot a leak developing elsewhere, being able to cut the water supply quickly matters. We have a full guide on this: Finding your stopcock: a Belfast homeowner's guide to shutting off the water fast.
Beyond that, there is not a great deal to do unless you are confident with basic plumbing. Replacing a tap washer is a job some homeowners tackle themselves, but it requires isolating the water supply to that tap, removing the tap head, and getting to the washer without damaging the fitting. If you are not sure what type of tap you have, or if the tap is old and the fittings are stiff, it is easy to make things worse. A rounded-off screw or a cracked tap body turns a small job into a bigger one.
If you are not comfortable doing it yourself, just call us. It is a routine repair and we will not make you feel like you should have done it yourself.
When a dripping tap is more than just a tap
Most of the time, a dripping tap is exactly what it looks like. But occasionally it points to something else.
If you have got a tap that drips even when it is turned off as hard as you can manage, and the pressure in your home seems lower than usual, it is worth checking whether the issue is with the tap or with the supply. Low or fluctuating water pressure in Belfast can sometimes be down to NI Water carrying out work in the area, but it can also indicate a problem on your own supply pipe.
If you notice a dripping tap alongside damp patches on walls or ceilings, or if you can hear water running when nothing is turned on, that is a different situation entirely. Those are signs of a hidden leak rather than just a worn washer. Hidden leaks in Belfast's older housing stock are more common than people expect, particularly in properties where pipework has not been touched since the house was built. That is a job for leak detection, not a washer replacement.
Similarly, if you have a mixer tap in the bathroom and the drip is accompanied by poor flow or temperature inconsistency, it is worth having the whole fitting checked. Sometimes what looks like a tap problem is actually a pressure balancing issue within the hot and cold supply.
Taps in Belfast's older housing stock
A lot of Belfast's housing was built between the 1890s and the 1960s. Terraces in areas like Ballynafeigh, the Falls, the Shankill, Sydenham and Cregagh were built solidly, but the original plumbing has usually been modified, patched and added to over the years. That means you can end up with a mix of fittings from different eras, not all of them compatible, and not all of them easy to source parts for.
If you have a tap that is genuinely old, getting a replacement washer or cartridge can sometimes be the tricky part. We carry a range of common parts, but for unusual or discontinued fittings, we will tell you honestly if a full tap replacement makes more practical sense than trying to source a part that may not exist any more.
In newer builds and recently renovated bathrooms across South Belfast, Lisburn Road, Stranmillis and the surrounding areas, cartridge-based and ceramic disc taps are more common. These are generally easier to service, though the cartridges themselves can be brand-specific.
Dripping taps and bathroom renovations
If you are planning a bathroom renovation and you have got a dripping tap in there already, it often makes sense to sort the plumbing as part of the wider job rather than doing two separate visits. We do full bathroom installations across Belfast and the surrounding areas, and if you are ripping out an old bathroom suite anyway, that is a good time to look at the condition of all the supply and waste pipework behind the scenes.
The same applies to kitchens. A dripping kitchen tap is a common complaint, and if the tap itself is old or cheap, replacing it entirely rather than repairing it is sometimes the better call.
Frequently asked questions
Why is my tap still dripping after I replaced the washer? Usually this means either the washer was not the right size or type for the tap, or the tap seat is damaged. If the seat is pitted or corroded, a new washer will not sit flush against it and the drip will continue. A plumber can re-grind the seat or replace the tap body if needed.
Can a dripping tap cause water damage? Over time, yes. Constant moisture around a sink or bath fitting can cause sealant to break down, allow water to track behind tiles, and lead to damp in the cabinet underneath. It is worth sorting sooner rather than later.
How do I know if my dripping tap is a washer or a cartridge problem? Broadly speaking, if you have a traditional two-handle tap (one for hot, one for cold) and the drip comes from the spout, it is usually a washer. If you have a single-lever mixer, it is more likely a cartridge or ceramic disc. If you are not sure, we can take a look and tell you what is needed before we do anything.
Should I worry about my water bill with a dripping tap? If you are on a water meter, yes, it adds up. Even if you are not metered, a persistent drip is a sign of a failing component, and ignoring it means the problem usually gets worse rather than better. Fixing it now is nearly always cheaper than fixing it later.
When to give us a call
A dripping tap is rarely an emergency, but it is worth sorting properly rather than letting it run. If you have tried the basics and the drip is still there, or if you are not sure what type of tap you have or how old the fittings are, just get in touch and we will come and have a look.
If the drip has turned into something more serious, if there is water where it should not be or you suspect a leak behind the wall, that is when you want us there quickly. We cover Belfast and the surrounding areas and we are available when things go wrong at short notice.
For blocked sinks in the same room, it is also worth reading our guide on blocked sinks in your Belfast kitchen or bathroom, which covers when a plunge will do the job and when it will not.
Ready to get it sorted? Get in touch with us and we will arrange a visit at a time that suits you.
