Plumbing Problems in London Properties
London's housing stock ranges from Victorian terraces to modern apartments, each with their own plumbing challenges. Here are the five most common issues we see and how to address them.
1. Leaking Taps
The Problem: Dripping taps waste water and money—a single dripping tap can waste over 5,000 litres per year.
Common Causes:
- Worn washers
- Damaged O-rings
- Corroded valve seats
When to DIY vs Call a Professional:
- Simple washer replacement is DIY-friendly
- If the leak persists after washer replacement, call a plumber
- Mixer taps often need professional attention
2. Low Water Pressure
The Problem: Weak shower flow, slow-filling baths, and inefficient appliances.
Common Causes in London:
- Old galvanised pipes corroding internally
- Partially closed stop valve
- Water supply issues in your area
- Limescale buildup
Solutions:
- Check your internal stop valve is fully open
- Consider a water pressure booster
- Pipe replacement may be needed for older properties
3. Blocked Drains
The Problem: Slow draining sinks, unpleasant odours, and potential flooding.
Prevention Tips:
- Use drain guards to catch debris
- Never pour fat or oil down the drain
- Run hot water after washing up
- Monthly enzyme drain cleaner
When It's Serious:
- Multiple fixtures draining slowly = main drain issue
- Gurgling sounds from drains
- Water backing up
4. Running Toilets
The Problem: Constant water flow wastes money and indicates a fault.
Common Causes:
- Faulty flapper valve
- Float positioned incorrectly
- Worn flush valve seal
- Cracked overflow tube
Quick Checks:
- Look inside the cistern
- Check the water level
- Test the flapper by pressing down
5. Boiler and Heating Issues
The Problem: No hot water or heating failures, especially problematic in winter.
Warning Signs:
- Strange noises (kettling, banging)
- Pilot light keeps going out
- Radiators cold at top or bottom
- Pressure drops frequently
Essential Maintenance:
- Annual boiler service (required for warranty)
- Regular system flush every 5-10 years
- Bleed radiators annually
When to Call coreMaint
Contact us immediately for:
- Burst pipes or major leaks
- No hot water
- Sewage backing up
- Gas smell near boiler
- Water damage visible
For routine plumbing maintenance and repairs across Greenwich and London, our experienced team is here to help.
Got a plumbing problem? Get a free quote or call us on 020 3488 1913 for same-day response.


