Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD

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Product guide

Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD

WD-G3P600: The Waterdrop G3P600 is an under-sink, tankless reverse osmosis system with a listed 600 GPD capacity and a smart display faucet. Its stated 2:1 pure-to-drain ratio and filter-status display are useful for households wanting on-demand filtered water, though installation requires space and plumbing work beneath the sink.

At a glance

Tankless under-sink design, with the listing describing an eight-stage filtration system.
The listing states a 600 GPD production capacity and a 2:1 pure-to-drain ratio.
Smart faucet display is described as showing filtered-water TDS and filter life.
Manufacturer claims certification to NSF/ANSI 58 for TDS reduction, NSF/ANSI 42 for chlorine, taste and odour reduction, and NSF/ANSI 372 for lead-free materials.

Price

£360.99Save 20%

Reference price: ~~£449.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Tankless configuration avoids a storage tank beneath the sink.
Smart faucet display is stated to show TDS and remaining filter life.
The claimed 2:1 pure-to-drain ratio provides a useful water-use reference when comparing RO systems.

Cons

Under-sink installation needs plumbing connections and the listing says two holes must be drilled, one for the faucet and one for the drain connection.
Requires a corded electrical connection.

Technical specifications

10 specifications

Identity
Brand	Waterdrop
Model	WD-G3P600

Filtration and flow
Purification method	Reverse Osmosis
Listed filtration stages	8-stage Filtration, 600GPD high capacity, 2:1 low drain ratio, Smart display faucet
Maximum flow rate	0.42 Gallons Per Minute
Supported maximum inlet-water TDS	300

Power and operation
Power configuration	Corded Electric

Dimensions and installation
Installation type	Under Sink
Dimensions listed	45L x 14.4W x 46H centimetres

Capacity
Capacity	600 gallons

What to know before buying

The manufacturer describes an automatic flushing function. Check under-sink space, electrical access and the required faucet and drain openings before installation. The stated 600 GPD is a listing claim, not a guaranteed household output. The listed 600-gallon capacity is not clearly defined as system output or filter life.

What’s in the box

Included

RO system
RO filter
CF filter
CB filter
LED smart faucet
Other accessories

Who is it for?

A good fit for

Households seeking tankless under-sink reverse osmosis filtration with a dedicated smart display faucet.
Buyers who want a displayed TDS reading and filter-life indication at the tap.

Less suited to

Renters or buyers who cannot drill the required faucet and drain holes or modify under-sink plumbing.
People seeking a non-electric or countertop filtration system.

Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 653 ratings

5 stars82%82%
4 stars9%9%
3 stars2%2%
2 stars4%4%
1 star3%3%

Customer feedback highlights perceived water-quality and taste improvements, alongside reports that installation and filter changes are easy. Some customers mention occasional noise, and opinions on value are mixed. These experiences may matter for a system intended to supply drinking water at the tap, but they do not establish its filtration performance or noise level for every installation.

Positive themes

Customers report good-tasting water and straightforward installation and filter changes.

Negative themes

Some customers report occasional noise.

Mixed feedback

Customer opinions about value for money are mixed.

Frequently asked questions

Does the Waterdrop G3P600 need a storage tank?

It is described as a tankless under-sink reverse osmosis system.

What does the smart faucet display show?

The listing says it displays filtered-water TDS and tracks filter life.

What installation work does the listing specify?

It says two holes are needed, one for the RO faucet and one for the drain-pipe connection. It is also listed as an under-sink, corded-electric system.

What does the stated 2:1 ratio mean?

The manufacturer describes two cups of filtered water produced for every one cup of drain water. Treat this as a stated product claim rather than a guaranteed result under every water or installation condition.