Posted on

How to Fix a Dripping Tap (Or When to Call a Plumber)

Dripping tap keeping you awake? Here's how to fix it yourself, or when to admit defeat and call someone who knows what they're doing.

Why Taps Drip

Taps drip because the washer or ceramic disc that seals the valve has worn out. Every time you turn the tap, the washer compresses and releases. After years of use, it degrades and stops sealing properly. Water seeps through even when the tap's off.

Traditional taps with rubber washers last 5-10 years before the washer needs replacing. Modern quarter-turn taps with ceramic discs last longer, but the discs can crack or get debris stuck in them, causing drips.

Hard water makes it worse. Sheffield's water isn't particularly hard, but limescale can build up on tap mechanisms over time, stopping them sealing cleanly. You'll notice this more in kettles and shower heads than taps, but it's a factor.

Fixing a Dripping Tap Yourself

For a traditional tap with a rubber washer, you need: an adjustable spanner, a flat-head screwdriver, and a replacement washer from any hardware shop (they cost 50p). Turn your water off at the stopcock before you start.

Remove the tap head cover (usually pries off or unscrews). Undo the headgear nut with a spanner. Pull out the valve mechanism. You'll see a rubber washer at the bottom, held by a small screw. Replace it, reassemble, turn water back on.

If it still drips, the valve seat might be scored. You can buy a reseating tool to smooth it, but at this point you're often better off replacing the whole tap. A new tap costs £15-£60 and lasts another decade.

Quarter-turn ceramic disc taps are harder to fix. The cartridge is a sealed unit. If it's dripping, you need to replace the entire cartridge, which costs £15-£30 and requires the exact model. Easier to call a plumber unless you're confident.

When to Call a Plumber

If you've replaced the washer and it still drips, call us. The valve seat's probably damaged or the tap body's corroded. We'll assess whether it's fixable or needs replacing. Most tap replacements take 30-60 minutes.

If the tap's dripping from the spout AND the base, you've got multiple seals failing. This usually means the tap's worn out. Replacing it costs less than fixing it at this point. We charge £60-£120 to supply and fit a new tap.

If you can't get the tap apart (seized screws, corroded threads), don't force it. You'll snap something and turn a £5 washer job into a £120 tap replacement. We've got the tools to free seized taps without damage.

Kitchen mixer taps and thermostatic shower valves are more complex. If those are dripping, don't attempt it yourself unless you're experienced. The mechanisms are fiddly and replacement parts are expensive. We'll sort it properly.

How Much Water Does a Dripping Tap Waste?

A tap dripping once per second wastes about 5 liters a day. That's 1,800 liters a year, around £5 on your water bill if you're metered. Not massive, but annoying.

A fast drip (multiple drips per second) wastes 20-30 liters a day. That's 10,000+ liters a year, costing £25-£30 on your bill. Plus the constant dripping noise drives you mad.

Hot water drips cost more because you're heating that water before it drips away. A dripping hot tap in Sheffield can add £10-£15 to your annual heating bill. Fix it now, save money all year.

Replacing a Whole Tap

If your tap's old, corroded, or damaged beyond repair, replacing it completely costs £15-£60 for the tap plus £60-£120 for fitting. Takes 30-60 minutes and you get a new tap that'll last another 10 years.

Kitchen mixer taps are more complex than separate hot and cold taps. They need flexible hoses connecting to your water supply and the fixing nut is often hard to access. If you're not confident, call us. Botched fitting causes leaks that damage kitchen cabinets.

Thermostatic shower taps and mixer showers need professional fitting. The thermostatic cartridge is expensive (£60-£150) and needs precise installation to work properly. DIY installation often results in temperature control problems or leaks.

When replacing taps, check your supply pipes too. If they're old copper or corroded, consider replacing the pipe run at the same time. Adding isolation valves lets you shut off that tap without draining the whole system. Costs £30 extra but worth it.

Tools You'll Need for Tap Repair

For basic tap washer replacement you need: adjustable spanner, flat-head screwdriver, replacement washers (jumbo pack costs £3 from hardware shops), and PTFE tape for resealing threads. Old towels to catch drips and a bucket under the pipework.

For seized tap heads or corroded headgear nuts, add penetrating oil (WD-40 or similar), a larger wrench or pipe grips, and patience. Don't force anything or you'll snap parts. If it won't budge after oil and gentle persuasion, call us.

For cartridge replacement in ceramic disc taps, you might need the manufacturer's cartridge tool or a specific size Allen key. Check the tap model online before starting. Wrong tools damage the cartridge housing and turn a £20 job into a £120 tap replacement.

Always shut your water off at the stopcock before starting work on taps. Keep the stopcock key handy. If something goes wrong and water starts spraying everywhere, you need to shut it off fast. Don't start work without knowing where your stopcock is.

Common Mistakes When Fixing Taps

Using the wrong size washer is the most common mistake. Washers come in different sizes. Too big and it won't fit or will catch when you tighten the headgear. Too small and it won't seal. Take the old washer to the hardware shop and match it exactly.

Over-tightening headgear nuts damages the tap body and can crack ceramic mechanisms. Tighten firmly but don't reef on it. Hand-tight plus a quarter turn with a spanner is usually enough. If it drips, tighten a bit more. If it still drips, the washer or seat is faulty, not the tightness.

Forgetting PTFE tape on threads causes leaks around the headgear. Wrap 3-4 turns of PTFE tape clockwise around the threads before reassembling. This seals the threads and prevents water seeping past the nut.

Not turning the water off before starting is the classic DIY disaster. You'll flood your kitchen or bathroom when you remove the headgear and water sprays everywhere. Always shut the stopcock first, drain the tap by opening it, then work on it.

Taps That Scream or Vibrate

Screaming or vibrating taps (called water hammer) are caused by loose washers vibrating when water flows past them, high water pressure, or loose pipe clips letting pipes shake. It's annoying and it damages your plumbing over time.

Replace worn tap washers first. A loose or degraded washer vibrates in the water flow creating the screaming noise. New washer usually fixes it. If it continues, check your water pressure with a gauge. Over 3 bar is too high and needs a pressure reducer fitting.

Loose pipe clips let pipes vibrate when water flows. You'll hear banging or humming from inside walls or under floors. Tighten or add pipe clips where you can access them. If the pipes are buried in walls, you might need to live with it or re-route them.

Air in the system can cause vibration and banging. Drain your whole system (shut stopcock, open all taps, open drain cock if you have one) then refill slowly. This purges air out. If it comes back, there's a leak somewhere letting air in.

Tap Problems Beyond Dripping

Stiff taps that need forcing to turn are usually caused by limescale buildup on the spindle or seized washers stuck to valve seats. Forcing them damages internal threads and cracks ceramic mechanisms. Better to replace the tap than break it completely.

Leaks from the base of taps (where tap meets sink or basin) are caused by failed O-rings or damaged seals in the tap body. These aren't fixable with washer replacement. You need to remove the tap, replace seals, and reseal it to the sink. Takes 45-60 minutes.

Low pressure from one tap when others are fine suggests a blocked tap aerator (the mesh screen at the spout end). Unscrew it, clean out debris and limescale, and screw it back. Takes 2 minutes and fixes most low-pressure tap issues.

Taps that turn endlessly without shutting off have stripped threads inside the tap body. This isn't fixable, the tap's finished. Replace it before you can't shut it off at all and water runs constantly. We've been called to properties flooded because an old tap failed completely.

Modern sensor taps and electronic mixer taps need batteries or mains power. If they stop working, check batteries first. If that doesn't fix it, the sensor or solenoid valve has failed. These parts cost £60-£120 and need professional fitting.

Hard Water Effects on Taps

Sheffield's water is moderately soft (around 100-150 mg/l calcium carbonate), but limescale still builds up over years. It accumulates on tap mechanisms, shower heads, and inside pipes, causing taps to drip and mechanisms to seize.

Descaling taps involves soaking aerators and mechanisms in white vinegar or citric acid solution overnight. This dissolves limescale deposits. For tap bodies and shower heads, wrap in vinegar-soaked cloths secured with elastic bands, leave for a few hours, rinse and reassemble.

Water softeners prevent limescale buildup by removing calcium and magnesium from your water supply. They cost £500-£1,500 installed and need salt topping up monthly. Worth it if you have persistent limescale problems, but probably overkill for Sheffield's moderately soft water.

If you're in an area of Sheffield with harder water (some parts of S17 and outer areas), consider tap models designed for hard water. Ceramic disc cartridges resist limescale better than traditional washers. Thermostatic shower valves with limescale protection cost slightly more but last longer. <h2>Related Services</h2><ul><li><a href="https://sheffieldplumbers.co.uk/emergency-plumbing.html">Emergency Plumber</a></li><li><a href="https://sheffieldplumbers.co.uk/blocked-drains.html">Blocked Drains</a></li><li><a href="https://sheffieldplumbers.co.uk/boiler-repairs.html">Boiler Repairs</a></li></ul>