Clean, filtered water isn’t a luxury it’s a necessity for every home in London. Whether you use an under sink water filter, an inline water filter, or a whole house water filter system, regular maintenance is the only way to ensure your water remains safe, clear, and healthy. One of the most overlooked aspects of maintenance is replacing the filter cartridge on time.
Here are the top 5 signs that your water filter needs replacing ignore them, and you might be putting your health at risk.
1. Water Tastes or Smells Off
If your filtered water suddenly starts tasting metallic, bitter, or earthy, it’s a clear indication the filter is no longer doing its job. Similarly, any kind of odour—chlorine-like, musty, or chemical—means the filtration media is exhausted.
Old cartridges lose their ability to remove contaminants effectively, allowing chemicals and sediments back into your drinking water. This is especially common with under sink water filters that haven’t been replaced for months.
2. Cloudy Water or Visible Particles
Filtered water should always be crystal clear. If your glass shows cloudy water or small floating particles, your filter may be failing. These visible signs usually mean the filter can no longer trap sediments or organic matter.
This issue is particularly common in areas of London where water hardness and mineral content are high, making a whole house water filter a better long-term option—but only if maintained properly.
3. Slow Flow Rate
A sudden drop in water pressure or a weak flow from your tap can be due to a clogged filter. Over time, dirt and impurities build up inside the filter, reducing its efficiency and water output.
This is a common sign for inline water filters installed directly to your mains or kitchen line. Ignoring this can lead to pipe stress, inefficient appliance performance, and poor water quality.
4. Filter Looks Dirty or Feels Slimy
If your filter is accessible, remove it and check its surface. A used filter often turns dark brown, black, or green with trapped bacteria, algae, or sediment. Any slimy coating or foul smell is a red flag.
Not replacing such a filter on time can do more harm than good, as the trapped contaminants can start leaching back into your water.
5. It’s Been More Than 6 Months
Most residential filters including under sink, inline, and whole house water filters—require replacement every 3 to 6 months, depending on usage and local water quality. Delaying beyond this window affects not just taste and clarity but also your health.
Don’t guess—mark your calendar or subscribe to a regular filter replacement service.
Why Replacing Filters On Time Matters
- Health Protection: Old filters breed bacteria and allow contaminants to pass through.
- Better Tasting Water: Fresh filters restore taste, clarity, and smell.
- Appliance Longevity: Clean water extends the life of your taps, kettles, and dishwashers.
- Lower Plumbing Costs: Prevents scale build-up in pipes caused by unfiltered hard water.
Need Help Choosing the Right Filter?
At London Water Filter, we offer a wide range of replacement cartridges and full systems—from under sink to whole house filters. We also provide filter installation and repair services across London, so you never have to worry about maintenance again.
Frequently Asked Questions
How often should a water filter be replaced?
Most filters need replacement every 3 to 6 months, depending on usage and the type of filter. Always follow the manufacturer’s recommendation for your specific under sink water filter or inline water filter.
What happens if I don’t change my water filter?
Old filters stop removing contaminants, making your water unsafe. You may also notice bad taste, smell, and possible bacteria buildup.
Which water filter is best for London homes?
For most London households, an under sink water filter offers reliable daily protection. If you want whole-home coverage, a whole house water filter ensures clean water at every tap.
Is cloudy water harmful?
Yes. Cloudy or white water can contain sediments or air bubbles. If it doesn’t clear after a few minutes, your filter likely needs replacement.
Do you offer filter installation in London?
Yes, we provide professional filter fitting services in London for all water filter systems. Contact us to schedule an appointment.
Final Thoughts
Your water filter quietly works every day to protect your health. But like any essential system, it needs timely maintenance. Whether you’re using an inline, under sink, or whole house water filter, staying alert to these 5 signs will ensure your water remains fresh, safe, and clear.
✅ Check your current filter today.
✅ Order a replacement or schedule a fitting service with us now.