If you’re looking for the best Waterdrop reverse osmosis systems UK, you’re already on the right track. Waterdrop has become one of the most respected RO brands thanks to its tankless designs, high flow rates, compact footprint and excellent filtration performance.
In this guide, I compare all the main Waterdrop RO systems available in the UK – including premium, mid-range, compact and countertop models – and also share my real installation experience with the G5P700A (with photos). Before choosing a system, check how hard your water is in your area.
How Waterdrop Reverse Osmosis Works
Waterdrop RO systems use multi-stage filtration + precision reverse osmosis membranes to remove up to 99% of contaminants, including:
- Fluoride
- Lead & heavy metals
- PFAS (forever chemicals)
- Chlorine & chloramine
- Microplastics, pharmaceuticals & pesticides
Most Waterdrop models are tankless, meaning:
- no bulky storage tanks
- faster water on demand
- fresher water (no stagnation)
- less under-sink clutter
This is especially important in UK kitchens, where space is often tight.
If you’re also considering whole house filtration, you may want to read our guide here.
Alkaline Remineralisation – Important for Taste (Very Often Overlooked)
Standard reverse osmosis removes almost everything from water – including beneficial minerals. While this gives you extremely pure water, it can sometimes leave it tasting flat or slightly acidic.
Some Waterdrop models (those ending in “A”, such as the G5P700A) include built-in alkaline remineralisation, which adds back minerals like calcium and magnesium. This improves:
- taste
- mouthfeel
- pH balance
If you choose a non-alkaline Waterdrop model, you may want to add a separate alkaline post-filter cartridge to improve taste.
Important: If taste matters to you (and for most households it does), either:
- choose an alkaline version (A model), or
- plan to add a separate alkaline cartridge
This gives you pure + great-tasting water, not just pure water.
Top Waterdrop Reverse Osmosis Systems in the UK
1. Best Overall Performance – Waterdrop X12
Best for: large families, high water usage, premium kitchens
- ~1200 GPD flow rate
- 11-stage filtration + remineralisation
- Smart display + filter life monitoring
- Tankless, compact for its output
2. Best Mid-Premium Choice – Waterdrop X8
Best for: families who want high performance without the X12 price
- ~800 GPD tankless RO
- Fast flow, sleek design
- Excellent balance of power and size
3. Best Mid-Range Value – Waterdrop G3P600
Best for: most UK homes (price vs performance sweet spot)
- 600 GPD tankless system
- Smart display faucet
- Strong filtration efficiency
4. Best Budget Tankless Option – Waterdrop G2P600
Best for: entry-level buyers wanting tankless RO
- 600 GPD capacity
- Compact under-sink design
- Very good filtration for the price
5. Compact Budget Option – Waterdrop G5P500
Best for: small households, flats, light water usage
- 500 GPD
- Small footprint
- Affordable RO entry point
6. Best for Limited Space + Great Taste – Waterdrop G5P700A (My Personal Choice)
If you’re dealing with limited under-sink space (which is extremely common in UK kitchens), the Waterdrop G5P700A is one of the smartest options available.
This is the alkaline version of the G5P700, meaning:
- full RO purification
- plus built-in remineralisation for better taste (no separate cartridge needed)
Key benefits:
- Compact, space-saving design
- ~700 GPD capacity – more than enough for most households
- Built-in alkaline stage
- Ideal for cluttered plumbing areas and small cupboards
The G5P700A is frequently unavailable through Waterdrop UK. If it is out of stock, check Amazon for current availability before deciding whether to upgrade to the X12.
Check Price on AmazonReal-World Pick: Why I Installed the G5P700A in My Own Home (With Photos)
I chose the G5P700A specifically because of limited under-sink space in my kitchen. Larger systems like the X12 and X8 simply would not fit without major plumbing changes.
I documented the full installation with real photos and measurements. For a detailed breakdown, see my full Waterdrop G5P700A review.
From my experience:
- Space saving: It fitted neatly alongside existing plumbing.
- Taste: The alkaline remineralisation makes a noticeable difference – water tastes smooth, not flat.
- Noise & speed: Very quiet and fast for a compact unit.
- DIY install: Straightforward with clear instructions.
If you’re in a typical UK kitchen with tight space, this is the model I genuinely recommend. If you’re comparing all brands, see the best reverse osmosis systems in the UK.
Check latest G5P700A price & availabilityCountertop & Hot Water RO Options
7. Waterdrop A1 Countertop RO
Best for: rentals or where under-sink install isn’t possible
- Hot & cold filtered water
- Plug-and-play design
- Premium countertop option
8. Waterdrop Instant Hot RO System
Best for: tea/coffee lovers, instant convenience
Reverse Osmosis Instant Hot Water Dispenser System – Waterdrop K6
- Instant hot filtered water
- Great for busy kitchens
Quick Comparison Table – Best Waterdrop Reverse Osmosis Systems UK
| Model | Best For | Notes |
|---|---|---|
| X12 | Large families | Max performance |
| X8 | Medium families | High flow |
| G3P600 | Most homes | Best value |
| G2P600 | Budget | Solid tankless |
| G5P500 | Small homes | Compact |
| G5P700A | Limited space | Compact + alkaline |
| A1 / Instant Hot | No plumbing | Countertop |
Filtration Performance
Do Waterdrop Reverse Osmosis Systems Reduce PFAS (“Forever Chemicals”)?
With the UK Government publishing its PFAS Plan in 2026, more homeowners are asking whether home water filters can help reduce PFAS, sometimes called “forever chemicals.”
Reverse osmosis (RO) systems are among the most effective methods for removing contaminants from tap water. According to Waterdrop’s specifications, systems use a 0.0001 micron RO membrane, which is tested for reducing PFOA and PFOS, two of the most common PFAS compounds.
Some Waterdrop RO models also reference third-party testing and certifications such as NSF/ANSI 58 (RO systems) and NSF/ANSI 372 (lead-free materials). Certification can vary by model, so always check the exact Waterdrop product page for performance details.
For UK households, it’s important to understand that:
- Drinking water in England and Wales remains high quality
- The government is reviewing PFAS regulations
- RO systems provide an additional point-of-use barrier, rather than a solution to any confirmed nationwide contamination
For a deeper dive, see our full PFAS in UK drinking water guide, which explains risks, government plans, and which filtration systems are tested for PFAS reduction.
FAQs
Does Waterdrop remove fluoride?
Yes. Waterdrop RO membranes remove up to 99% of fluoride.
Do I need alkaline remineralisation?
If taste matters to you, yes. Either choose an A model or add a separate alkaline cartridge.
Is installation difficult?
Most models are DIY-friendly. A plumber can fit one in under an hour if preferred.
Do I need a water softener as well?
If you’re in a hard water area, pairing RO with a water softener can extend filter life and protect appliances.
Final Recommendation
If you want maximum performance and flow, go for the X12 or X8.
If you want best value, the G3P600 is excellent.
If you’re dealing with limited space (like most UK homes), the G5P700A is the smartest real-world choice – and the one I personally use.
For readers wanting advice on water intake please see the NHS guidance.
Check Your Local Water Hardness
Before choosing a filtration system, it’s useful to know how hard your local water supply is.
👉 Use the UK Water Hardness Checker to see hardness levels by postcode.
