Waterdrop G3P600 Review UK: Key Features at a Glance
The Waterdrop G3P600 is a high-performance, tankless under-sink reverse osmosis system designed for UK homes that want fast flow rates and excellent TDS reduction without a bulky storage tank.
This Waterdrop G3P600 Review UK covers real TDS results, installation notes, flow rate performance, pros, cons, and how it compares to the G5P700A, which I currently use in my home.
For verifying these improvements at home, the tap water quality testing guide shows how to measure TDS and contaminants accurately.
For Quick Price:
You’ll be taken directly to the Waterdrop G3P600 product page on the official UK store. Buying direct from Waterdrop UK often includes a longer warranty and faster customer support. Prefer Amazon Prime delivery? Check current prices on Amazon.
Check Price on Amazon
For a real-world example of an advanced RO system, here’s my Waterdrop G5P700A Review UK, including installation notes and 6-month performance.
For households with high sediment or rust, pairing with a whole-house sediment filter is recommended.
| Feature | Waterdrop G5P700A | Waterdrop G3P600 |
|---|---|---|
| Filtration Capacity | 700 GPD | 600 GPD |
| Waste Water Ratio | 1.5:1 | 2:1 |
| Remineralisation | YES – built-in | No (requires external cartridge) |
| Tankless Design | Yes | Yes |
| Noise Level | Very quiet | Quiet |
| Best For | Small–medium UK kitchens | Large households / high usage |
| Installation Space Needed | Minimal (compact) | Medium (due to tanks) |
| Price | Lower | Higher |
| UK Hard-Water Suitability | Excellent | Excellent |
If you’re considering upgrading to the newer model, see our Waterdrop X8 G3P800 Review UK to compare flow rate, UV protection and overall filtration performance.
Overview: What the G3P600 Is Designed For
The G3P600 is built for UK homes that want:
- Fast water flow (600 GPD / ~1.6 L/min)
- Tankless design
- Better performance for tea/coffee flavour
- RO purification without remineralisation
- A more “premium” build vs cheaper RO units
It sits in the premium category because of the stronger pump, fast recovery time, and digital display.
Want to compare directly? Here’s my Waterdrop G5P700A Review UK with real TDS tests and installation photos.
It’s worth noting that under-sink reverse osmosis systems like the G3P600 only treat drinking water, not the rest of the home. Many UK households pair an RO system with a whole house water filter and softener combo to protect plumbing, boilers and appliances from hard-water damage. We explain how this setup works — and which systems are best — in our guide to the best whole house water filter and softener combo UK.
Waterdrop G3P600 Installation & Setup (Real UK Fit Notes)
Installation is straightforward and similar to other Waterdrop under-sink systems:
- All tubing is colour-coded
- Digital faucet connects automatically
- Flush cycle starts instantly
- Requires standard UK 3/8″ plumbing
- Needs a bit more cabinet height than the G5P700A
If your under-sink cupboard is tight (like mine), the G5P700A fits easier. But if you have space, the G3P600 is the more powerful system.
TDS & Water Quality Results
If you’re comparing RO systems for UK hard-water areas, this Waterdrop G3P600 Review UK shows how it performs in real conditions. Performance is strong:
| Test | Result |
|---|---|
| Tap water TDS | ~280 ppm (UK hard water) |
| After G3P600 | 12–25 ppm |
This is very similar to the G5P700A, but water taste is more “neutral” because there is no remineralisation stage.
If you prefer a slightly more natural flavour, the G5P700A with remineralisation wins here.
Flow Rate & Performance
The top selling point of the G3P600 is speed.
- ~600 gallons per day
- ~1.6 L/min actual tested flow
- Faster filling of kettles and pans
- Better for families with higher consumption
If you want the strongest RO flow in the Waterdrop of the two lineup, this is the one. For the highest flow rate version, the Waterdrop X8 (G3P800) review compares the 800GPD upgrade.
Noise Level
The internal pump is slightly louder than the G5P700A.
Not annoying, but higher frequency during dispensing.
Maintenance & Filter Costs
Filter changes are simple:
- CF filter: 6 months
- RO membrane: 2 years
- CB filter: 1 year
Costs are similar to the G5P700A.
The digital screen gives accurate filter life remaining — a good upgrade over cheaper brands. For alternatives in a similar tier, the Waterdrop vs iSpring UK comparison is helpful. Please see the guide for compatible replacement Waterdrop filters in the UK.
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.
G3P600 vs G5P700A (Which Should You Buy?)
So how can we conclude the Waterdrop G3P600 Review UK? The system performs extremely well for flow rate and TDS reduction.This is where the decision is easy:
Choose Waterdrop G3P600 if you want:
- Maximum flow rate
- Strong pump performance
- Larger cupboard space
- Neutral taste (no minerals added)
Choose Waterdrop G5P700A if you want:
- Remineralised, smoother drinking taste
- Smaller footprint (fits tight cupboards)
- Quiet operation
- Best balance of price + performance
I personally use the G5P700A because of cupboard size and remineralisation — but the G3P600 is the “powerhouse” model.
For wider options, see my full guide to the Best Under-Sink Water Filters UK (2025). If you prefer a greener option? Here’s my review of Eco-Friendly Water Filters for UK Homes, which compare low-waste and sustainable systems.
Pros & Cons
Based on my testing for this Waterdrop G3P600 Review UK, the system performs extremely well for flow rate and TDS reduction.
✔ Pros
- Very fast flow rate
- Great TDS results
- Premium build quality
- Digital monitoring faucet
- Strong pump for UK low pressure
✘ Cons
- No remineralisation
- Slightly louder pump
- Bigger than the G5P700A
You’ll be taken directly to the Waterdrop G3P600 product page on the official UK store. Buying direct from Waterdrop UK often includes a longer warranty and faster customer support. Prefer Amazon Prime delivery? Check current prices on Amazon.
Check Price on AmazonVerdict: Waterdrop G3P600 Review UK Is It Worth It?
Yes — if you have the space and want maximum RO performance, the G3P600 is one of the best under-sink systems available.
For small kitchens or those who prefer better-tasting water, the G5P700A remains the more versatile choice.
FAQs
Is the Waterdrop G3P600 good for UK hard water?
Yes. In UK hard-water areas it typically reduces TDS from ~250–300 ppm down to 10–25 ppm.
Does the G3P600 need a booster pump in the UK?
No. It includes an internal pump suitable for most UK homes, even low-pressure ones.
Is the G3P600 louder than the G5P700A?
Yes, slightly. The stronger pump produces a slightly higher noise level during dispensing.
Is the G3P600 or G5P700A better?
G3P600 is faster and more powerful. The G5P700A offers remineralisation and a smaller footprint.
How much cupboard space do I need for the G3P600?
It requires more height than the G5P700A. Check your under-sink dimensions before buying.
Is installation DIY-friendly?
Yes — most UK homeowners install it in under 1 hour with basic tools.
How long do Waterdrop filters last?
Between 6–12 months depending on usage and hardness. Sediment filters may need earlier replacement.
Final Verdict – Waterdrop G3P600 Review UK.
If you want the fastest under-sink RO system with excellent TDS reduction and strong pump performance, the Waterdrop G3P600 is one of the best options in the UK.
If you prefer smoother taste, lower noise and smaller size, the G5P700A is a better fit.
Buy the G3P600 here →
Compare with the G5P700A →
If low water pressure is an issue in your home, you may also benefit from a shower head designed for low-pressure systems — I’ve tested the best options here.
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.
