Which Water Filter to Buy
Which Water Filter Should You Buy?
UK tap water is safe — but filtered water tastes better, removes hidden contaminants, and costs a fraction of bottled water. Find the right filter in minutes.
What Does a Water Filter Actually Do For You?
UK tap water meets legal safety standards — but safe and pure are not the same thing.
Better Taste & No Smell
Chlorine gives tap water that flat, chemical smell. Carbon filtration removes it completely, leaving water crisp and genuinely refreshing.
Remove Hidden Contaminants
Microplastics, trace pharmaceuticals, pesticide residues, and lead from old pipework can all be present in compliant tap water.
Save vs Bottled Water
UK families spend £250–£500 per year on bottled water. A quality filter pays for itself within weeks — with none of the plastic waste.
Protect Appliances & Skin
Hard water builds limescale in kettles, boilers, and showers. Filtered or softened water extends appliance life and is gentler on skin and hair.
⚠️ The UK reality: Tap water complies with legal standards at 99.96% — yet trace levels of chlorine, microplastics, and pharmaceutical residues are routinely detected. A filter is not a necessity, but it is a meaningful upgrade for taste, health, and peace of mind.
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The Main Types of Water Filter — Explained Simply
Different filters work in fundamentally different ways. Here's what you need to know.
Carbon / Absorption Filters
Activated carbon (often coconut shell) attracts and traps chlorine, chloramines, pesticides, and organic compounds. Carbon block is more effective than granular and the type we most frequently recommend. Works in jugs, under-sink, and inline systems.
- Dramatically improves taste and smell
- Most affordable entry point for most households
- Retains beneficial minerals in your water
- Wide range of options for every budget
- Won't remove water hardness or heavy metals alone
- Cartridges need regular scheduled replacement
Ceramic & Mechanical Filters
A ceramic element with millions of sub-micron pores physically traps sediment, bacteria, and cysts. The finer the pore (micron rating), the smaller the particle removed. Ceramic elements are cleanable and long-lasting — cost-effective over time.
- Highly effective against bacteria and cysts
- Ceramic elements cleaned and reused — less waste
- Essential for borehole, well, and rural water
- No electricity or pressure required
- Does not remove dissolved chemicals or hardness
- Flow rate slower than carbon filters
Reverse Osmosis (RO)
Water is pushed through a semi-permeable membrane that blocks virtually everything — lead, fluoride, nitrates, hormones, and pharmaceuticals. The most thorough home filtration available. Premium systems re-add beneficial minerals after filtration for optimal taste and health.
- Removes 99%+ of contaminants
- Eliminates fluoride, lead, nitrates & hormones
- Ideal for health-sensitive households & young children
- Modern systems are far more efficient than older designs
- Higher upfront cost than other filter types
- Choose a system with built-in re-mineralisation
Ultra Violet (UV) Sterilisation
Uses UV light to destroy bacteria, viruses, and waterborne pathogens without adding chemicals. Essential for non-mains water — boreholes, wells, springs, and rainwater harvesting. Typically paired with a ceramic pre-filter for complete protection.
Learn About UV Systems ›Water Softeners & Descalers
Hard water causes limescale in kettles, boilers, shower heads, and washing machines. Salt-based softeners remove hardness minerals entirely. Salt-free conditioners prevent scaling without the running costs or installation complexity of a traditional softener.
Full Softening Guide ›Which Filter Removes What?
Match your water concern to the right technology at a glance.
← Swipe left to see all columns →
| What to Remove | Carbon | Ceramic | Reverse Osmosis | UV | Softener |
|---|---|---|---|---|---|
| Chlorine & Odour | ✔ Excellent | ~ Partial | ✔ Yes | ✗ No | ✗ No |
| Bacteria & Cysts | ✗ No | ✔ Excellent | ✔ Yes | ✔ Excellent | ✗ No |
| Lead & Heavy Metals | ~ Some | ~ Some | ✔ Excellent | ✗ No | ✗ No |
| Fluoride | ✗ No | ✗ No | ✔ Excellent | ✗ No | ✗ No |
| Hormones & Pharmaceuticals | ~ Partial | ✗ No | ✔ Excellent | ✗ No | ✗ No |
| Pesticides & Herbicides | ✔ Good | ✗ No | ✔ Excellent | ✗ No | ✗ No |
| Microplastics | ✔ Good | ✔ Good | ✔ Excellent | ✗ No | ✗ No |
| Limescale / Hardness | ✗ No | ✗ No | ✔ Yes | ✗ No | ✔ Excellent |
| Sediment & Rust | ~ Some | ✔ Excellent | ✔ Yes | ✗ No | ✗ No |
| Nitrates | ✗ No | ✗ No | ✔ Excellent | ✗ No | ✗ No |
| Viruses | ✗ No | ~ Some | ✔ Yes | ✔ Excellent | ✗ No |
💡 Pro tip: Many of the best systems combine technologies — an RO unit typically includes a sediment pre-filter and carbon stage, giving you broad-spectrum protection in one package. Our quiz recommends the right combination for you →
Still Not Sure? Find Your Filter in 30 Seconds
Answer a few quick questions about your water concerns, budget, and setup — we'll point you to exactly the right filter. No technical knowledge required.
Frequently Asked Questions
UK tap water is safe and among the most regulated in the world — so no, you don't need one. But "safe" and "pure" are different standards. Trace levels of chlorine, microplastics, pharmaceutical residues, and occasionally lead from older plumbing are routinely detected. Most people filter primarily for taste — removing chlorine alone transforms tap water. If you have specific health concerns, allergies, young children, or simply want the best quality water possible, a filter is a worthwhile investment.
A filter jug is portable, needs no installation, and is the most affordable starting point — you fill it by hand and it sits in the fridge. An under-sink system is plumbed in and delivers filtered water on demand through a dedicated tap, with no refilling, no waiting, and much larger daily capacity. Under-sink systems offer more comprehensive filtration and far better value for families who drink a lot of water.
It varies by type and usage. Filter jugs typically need a new cartridge every 4–8 weeks. Under-sink carbon filters last 6–12 months. Reverse osmosis membranes last 2–5 years, with carbon pre- and post-filters replaced annually. We offer a free filter reminder service — we'll email you when it's time to reorder so you never have to remember. Existing customers can reorder here →
Yes — with an important caveat. RO removes everything, including beneficial minerals like magnesium and calcium, and can leave water slightly acidic. However, the quality RO systems we supply include a remineralisation stage that adds back healthy minerals and raises pH to a neutral level. We always recommend choosing an RO system with built-in remineralisation for drinking water use.
Standard carbon and ceramic filters do not remove water hardness. To address limescale you need a water softener, a salt-free descaler/conditioner, or a reverse osmosis system. Reverse osmosis removes hardness minerals entirely. Salt-free systems prevent scaling without the running costs of a salt softener. Read our full softening guide →
Simple — our 90-day money-back guarantee means you can return any filter with free returns, no questions asked. We're a family business and our reputation depends on getting you the right result. If you're unsure before buying, contact our expert team — we're happy to recommend the right product for your exact situation. Read our guarantee →
Yes — we stock a huge range of replacement cartridges for virtually every filter brand and model sold in the UK, including Brita, Doulton, Everpure, Aquadial, and many more. We also offer a free reminder service so you never forget to change your filter on time. Find your replacement cartridge →
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