Leaking Tap: Quick Fixes & When to Call a Plumber | UK Guide 2025

Why Is My Tap Leaking?

A leaking tap is one of the most common household plumbing issues in the UK, affecting millions of homes every year. That constant drip-drip-drip isn't just annoying—it's wasting water, increasing your bills, and potentially causing damage to your sink and surrounding areas.

The good news? Many tap leaks can be fixed with basic DIY skills and minimal tools. However, knowing when to tackle it yourself versus calling a professional plumber can save you time, money, and potential water damage.

This comprehensive guide covers everything you need to know about leaking taps, from identifying the cause to fixing it yourself or finding a trusted plumber in your area.

Common Causes of Leaking Taps

Understanding why your tap is leaking helps you determine the best solution:

1. Worn Washer (Most Common)

The rubber or silicone washer inside your tap wears down over time from constant friction when turning the tap on and off.

Signs:

1. Dripping from the spout when the tap is off
1. Gradually worsening over weeks/months
• More common in traditional turn-handle taps

DIY Difficulty: Easy ⭐ Cost: £1-£5 for replacement washers

2. Damaged O-Ring

The O-ring seals the tap cartridge or valve and can become worn, loose, or damaged.

Signs:

1. Water leaking around the handle base
1. Visible moisture on the tap body
• Common in mixer taps

DIY Difficulty: Moderate ⭐⭐ Cost: £2-£8 for replacement O-rings

3. Corroded Valve Seat

The valve seat connects the tap to the spout. Mineral deposits from hard water can cause corrosion.

Signs:

1. Persistent dripping from spout
1. White/brown mineral buildup visible
• Common in hard water areas (South East England)

DIY Difficulty: Difficult ⭐⭐⭐ Cost: £10-£20 for replacement valve seat

4. Loose Parts

Over time, screws, adjusting rings, or packing nuts can work loose from regular use.

Signs:

1. Wobbling tap handle
1. Leaks that come and go
• Recently noticed problem

DIY Difficulty: Easy ⭐ Cost: £0 (just tighten existing parts)

5. High Water Pressure

Excessively high water pressure can force water past seals and washers.

Signs:

1. Leaks only at certain times of day
1. Multiple taps leaking
• Water hammer noise in pipes

DIY Difficulty: Professional needed ⭐⭐⭐⭐ Cost: £150-£400 for pressure reducer installation

6. Faulty Cartridge (Modern Taps)

Modern mixer taps use ceramic disc cartridges that can fail over time.

Signs:

1. Constant dripping from spout
1. Difficulty turning tap on/off smoothly
• Mixer tap with single lever handle

DIY Difficulty: Moderate ⭐⭐ Cost: £15-£50 for replacement cartridge

Quick DIY Fixes for Common Tap Leaks

Tools You'll Need

Before starting any tap repair, gather these essential tools:

1. Adjustable spanner or wrench
1. Flat-head and Phillips screwdrivers
1. Replacement washers/O-rings/cartridge (as needed)
1. Old towel or cloth
1. Bucket or bowl
1. Penetrating oil (WD-40)
• Waterproof tape (optional)

Cost for basic tool kit: £15-£30 if you don't own these already

How to Fix a Dripping Tap: Step-by-Step

Step 1: Turn Off the Water Supply

CRITICAL SAFETY STEP - Never skip this!

1. Locate the isolation valve under your sink (usually two small taps on the pipes)

1. Turn both valves clockwise until fully closed

1. Turn the leaking tap on to drain remaining water

If there are no isolation valves, turn off the main stopcock (usually under kitchen sink or where the water main enters)

Not sure where your stopcock is? Check our guide on finding and maintaining your stopcock.

Step 2: Identify Your Tap Type

Traditional Pillar Taps (separate hot and cold taps):

1. Most common in older UK homes
1. Turn handles to operate
• Usually have replaceable washers

Mixer Taps (single spout, two handles):

1. Combined hot and cold output
1. May have washers or cartridges
• Slightly more complex

Monobloc Taps (single lever):

1. Modern design with one control
1. Use ceramic disc cartridges
• Usually require cartridge replacement

Step 3: Dismantle the Tap

For Traditional Pillar Taps:

1. Remove the decorative cap on top of the handle (usually marked H or C)

1. Unscrew the small screw underneath with appropriate screwdriver

1. Pull off the handle (may need gentle wiggling)

1. Use adjustable spanner to unscrew the headgear/bonnet (turn anticlockwise)

Remove the jumper valve and washer assembly

For Mixer Taps:

1. Remove handle (method varies by model—check underneath for screw)

1. Unscrew collar or cover plate

1. Remove cartridge or valve assembly

Inspect O-rings and seals

For Monobloc Taps:

1. Loosen grub screw on the side or rear of lever handle

1. Pull off the handle

1. Unscrew the cartridge housing

Pull out the ceramic disc cartridge

Take photos at each step so you remember how to reassemble!

Step 4: Replace the Faulty Component

Replacing a Washer:

1. Remove the old washer from the jumper valve

1. Clean the valve seat with a cloth

1. Insert a new washer of the correct size (measure old one)

1. Ensure washer sits flat and secure

Common sizes: 13mm, 15mm, 20mm

Top tip: Buy a multi-pack with various sizes (£3-£5) to have spares Replacing an O-Ring:

1. Note the O-ring's position before removing

1. Gently pry off the old O-ring with a flat-head screwdriver

1. Clean the groove thoroughly

1. Roll the new O-ring into position (don't stretch excessively)

Apply a tiny amount of silicone grease for smooth operation

Replacing a Cartridge:

1. Purchase the correct replacement cartridge (take old one to plumbers' merchant)

1. Remove the old cartridge noting its orientation

1. Clean the housing with a cloth

1. Insert the new cartridge exactly as the old one was positioned

Ensure it clicks or seats properly

Important: Cartridge types vary by manufacturer. For branded taps (Grohe, Hansgrohe, etc.), buy manufacturer-specific cartridges.

Step 5: Reassemble and Test

1. Carefully reassemble all parts in reverse order

1. Hand-tighten everything first, then use tools (don't over-tighten!)

1. Turn the water supply back on slowly

1. Check for leaks while the tap is off

1. Turn the tap on and off several times to check operation

Look underneath the sink for any new leaks

If the leak persists:

1. You may have the wrong size replacement part
1. The valve seat might be corroded (needs professional attention)
• There could be multiple issues requiring expert diagnosis

When to Call a Professional Plumber

Some tap leaks require professional expertise. Call a plumber if:

You Should Definitely Call a Plumber When:

✓ The tap is leaking from the base/bottom - May indicate pipe connection issues ✓ You can't turn off the water supply - Risk of flooding if attempted ✓ The tap spins freely without effect - Internal mechanism failure ✓ You've replaced parts but it still leaks - Multiple or complex issues ✓ There's visible corrosion or damage - Tap may need complete replacement ✓ Water is leaking behind the wall - Could indicate serious pipe problems ✓ You're uncomfortable with DIY plumbing - Better safe than sorry ✓ It's a commercial or antique tap - Specialist knowledge required ✓ Multiple taps are leaking - May indicate pressure or supply issues

Professional Repair Costs

Understanding typical costs helps you budget appropriately:

Call-out + Basic Repair (Washer Replacement):

1. London & South East: £60-£100
1. Rest of England: £45-£75
• Scotland & Wales: £40-£65

Tap Cartridge Replacement:

1. Labour: £50-£80
1. Parts: £15-£50
• Total: £65-£130

Full Tap Replacement:

1. Labour: £60-£120
1. Basic tap: £30-£60
1. Mid-range tap: £60-£150
1. Premium tap: £150-£400+
• Total: £90-£520+

Emergency Call-out (evenings/weekends):

1. Premium: +50-100% on standard rates
• Typical: £100-£200 depending on location

Prices are typical 2025 rates and vary by region and plumber

How Much Water (and Money) Are You Wasting?

A leaking tap wastes more than you think:

Drip Rate Analysis

Slow Drip (1 drip every 2 seconds):

1. 15 litres per day
1. 5,500 litres per year
1. Annual cost: £22 (water + sewerage)
• Environmental impact: 13kg CO₂

Medium Drip (1 drip per second):

1. 30 litres per day
1. 11,000 litres per year
1. Annual cost: £44
• Environmental impact: 26kg CO₂

Fast Drip (constant small stream):

1. 200+ litres per day
1. 73,000+ litres per year
1. Annual cost: £292+
• Environmental impact: 170kg+ CO₂

The takeaway: Even a slow drip is costing you £20-£30 per year. A £50 professional repair pays for itself in 2-3 years, often less.

Preventing Future Tap Leaks

Maintenance tips to extend your taps' lifespan:

Regular Maintenance (Every 6 Months)

Don't Over-Tighten Taps

- Turn taps off gently, not with full force - Over-tightening wears washers faster

- Teach children to turn taps off properly

Clean Aerators and Filters

- Remove and rinse aerator screens monthly - Soak in vinegar solution to dissolve limescale

- Prevents mineral buildup affecting seals

Check for Mineral Buildup

- Wipe taps with vinegar-dampened cloth weekly - Pay attention to areas around base and handles

- Use limescale remover in hard water areas

Inspect for Early Warning Signs

- Taps becoming harder to turn - Unusual noises when operating - Slight moisture around base or handles

- Catch problems before they become leaks

For Hard Water Areas

If you live in a hard water area (particularly South East England):

1. Install a water softener (£400-£1,000) - Prevents mineral buildup throughout home
1. Use limescale inhibitors (£15-£30) - Add to individual taps
1. Clean aerators monthly - Don't wait for reduced flow
• Replace washers annually - Preventive maintenance is cheap

Choose Quality Taps

When replacing taps, invest in quality:

Budget Taps (£20-£50):

1. Expected lifespan: 3-5 years
1. Basic materials, basic warranties
• May need repairs within 2 years

Mid-Range Taps (£50-£150):

1. Expected lifespan: 7-10 years
1. Better materials, decent warranties (2-5 years)
• Good balance of cost and quality

Premium Taps (£150-£400+):

1. Expected lifespan: 15+ years
1. Excellent materials, long warranties (10-25 years)
1. Easier to get replacement parts
• Often designed for easy servicing

Best value brands in UK:

1. Bristan (mid-range, good parts availability)
1. Grohe (premium, excellent longevity)
1. Hansgrohe (premium, great warranties)
• Abode (mid-range, designed for UK water)

Health and Safety Considerations

When Tap Leaks Become Safety Issues

Immediately call a plumber if you notice:

1. Brown or discoloured water - May indicate corroded pipes
1. Blue-green staining - Possible copper pipe corrosion
1. Black deposits - Could be rubber deterioration or bacteria
1. Rotten egg smell - Potential bacteria in water heater
1. Reduced hot water temperature - Immersion heater or boiler issues
• Water pooling under sink - Risk of wood rot and mould

DIY Safety Tips

1. Always turn off water supply first - No exceptions
1. Put plug in sink - Catches small screws and parts
1. Take photos at each step - Helps with reassembly
1. Don't force anything - If stuck, use penetrating oil and wait
1. Protect the tap finish - Wrap jaws of tools with cloth
1. Have a bucket ready - Residual water will drain out
• Test under sink after repair - Check for drips from connections

Find a Trusted Plumber in Your Area

If your leaking tap needs professional attention, BetterHomeHub connects you with verified, local plumbers across the UK.

Why use BetterHomeHub?

✓ Verified Professionals - All plumbers checked, insured, and reviewed ✓ Compare Quotes - Get up to 5 free quotes from local plumbers ✓ Read Reviews - Real customer feedback on completed jobs ✓ Easy Booking - Message plumbers directly about your specific leak ✓ Fair Pricing - Competitive quotes with transparent costs Get started now:

1. Describe your tap leak issue

1. Receive quotes from local plumbers within 24 hours

1. Compare prices, reviews, and availability

Book the right plumber for your needs

Get free plumber quotes now - Usually receive responses within hours.

Frequently Asked Questions

1. How urgent is a leaking tap?

While not an immediate emergency like a burst pipe, a leaking tap should be fixed within 1-2 weeks. It's wasting water and money, and prolonged leaks can cause damage to sinks, worktops, and cabinets underneath. If water is pooling or dripping onto electrics, treat it as urgent.

2. Can I fix a tap leak without turning off the water?

Absolutely not. Always turn off the water supply before attempting any tap repairs. Failing to do so can result in flooding, water damage, and potential injury from slipping. It's a non-negotiable safety step that takes just 30 seconds.

3. Why does my tap leak only at night or certain times?

This usually indicates water pressure fluctuations. Water pressure often increases at night when fewer people are using water in your area. If seals or washers are partially worn, they may hold under normal pressure but leak under higher pressure. Consider having your water pressure tested.

4. I replaced the washer but my tap still leaks. What now?

The most common reasons are: wrong size washer, incorrect fitting, corroded valve seat, or a second issue you haven't identified. Check the washer is the correct size and seated properly. If it still leaks, the valve seat likely needs professional attention or the tap may need replacing.

5. How long should a tap washer last?

In soft water areas: 5-8 years. In hard water areas: 2-4 years. With ceramic disc cartridges: 10-15 years. Lifespan depends on water hardness, usage frequency, and quality of parts. If you're replacing washers annually, consider upgrading to better quality taps or installing a water softener.

6. Is it worth repairing an old tap or should I replace it?

If the tap is under 10 years old, repair is usually worthwhile. If it's older, has visible corrosion, multiple issues, or the cost of repair approaches 50-70% of a new tap's cost, replacement is often smarter. Also consider that modern taps are more water-efficient, potentially saving money long-term.

Conclusion: Don't Let a Dripping Tap Drain Your Wallet

A leaking tap is one of the most fixable household problems, often requiring just a £2 washer and 20 minutes of your time. However, knowing your limits and calling a professional when needed prevents small problems from becoming expensive disasters.

Key Takeaways:

1. Most tap leaks are caused by worn washers or O-rings (easy DIY fixes)
1. Always turn off the water supply before starting repairs
1. A slow drip wastes 5,500 litres and costs £22 per year
1. Professional repairs cost £45-£100 typically, often paying for themselves quickly
1. Prevention through gentle handling and regular cleaning extends tap life
• Call a plumber if you're uncomfortable, can't stop the water, or the leak persists

Whether you choose to DIY or hire a professional, acting quickly prevents water waste, saves money, and protects your home from potential water damage.

Find a trusted plumber near you today and get that annoying drip sorted once and for all.