# 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.

- [Original product page](https://bargainpostbox.co.uk/product/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [View offer](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Waterdrop
- Model: WD-G3P600
- Category: Home & Kitchen > Kitchen Appliances > Water Purifiers
- Price: 360.99 GBP
- Previous price: 449.99 GBP
- Discount: 20%
- Price checked: 2026-11-14T09:52:46.531Z
- Rating: 4.6 / 5
- Reviews: 653

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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

## Before you buy

- 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.

## In the box

- RO system (Included)
- RO filter (Included)
- CF filter (Included)
- CB filter (Included)
- LED smart faucet (Included)
- Other accessories (Included): The listing does not specify which accessories.

## 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.

## Customer feedback

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.

## Alternative options

- [Waterdrop G5P500A Alkaline Mineral pH+ RO Water Filtration System, 500GPD \| NSF/ANSI 58 & 372 Certified, Reduces TDS, BPA Free, Tankless RO Water Filter, 2:1 Pure to Drain, Hard-Water Household Use](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [Waterdrop T4-A Alkaline pH+ Reverse Osmosis Water Filter, 450 GPD \| NSF/ANSI 372 Certified, 2:1 Pure to Drain, Tankless Undersink RO System, Dual Flow, 10-Stage, BPA Free, Plug-in Required](https://bargainpostbox.co.uk/visit/waterdrop-t4-a-alkaline-reverse-osmosis-filter)
- [Waterdrop 15UA Under Sink Water Filter System, 19000 Gallons for 2 Years \| Reduce PFAS, PFOA/PFOS, Lead, Chlorine, Bad Taste, NSF/ANSI 42 Certified, Direct Connect to Original Faucet](https://bargainpostbox.co.uk/visit/waterdrop-wd-15ua-under-sink-water-filter)
- [Waterdrop TSB Under Sink Water Filter System, 8-Layer Filtration \| Reduce PFAS, PFOA/PFOS, Reduce Lead, Chlorine, Bad Taste, NSF/ANSI 42 Certified, No TDS Reduction, with Dedicated Faucet](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [Waterdrop AS13 Stainless Steel Under Sink Water Filter, Reduces Chlorine \| NSF/ANSI 42 Certified, Reduce Lead, PFAS, PFOA/PFOS, 6-Stage Filtration, No Drilling Required, Connect to Original Faucet](https://bargainpostbox.co.uk/visit/waterdrop-as13-stainless-steel-under-sink-water-filter)
- [Waterdrop 10UB Under Sink Water Filter System, 11000 Gallons \| Reduce PFOA/PFOS, Reduce Lead, Chlorine, Bad Taste, Odor, NSF/ANSI 42 Certified, with Dedicated Faucet](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [Waterdrop C2SL Mineral-Added Reverse Osmosis System, with Glass Pitcher \| 7-Stage Countertop RO Filtration, 1.2L Autofill Glass Pitcher, 3:1 Pure to Drain, Reduce PFAS/TDS, Installation-Free](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [Waterdrop TSA 8-Layer Under Sink Water Filter System, NSF/ANSI 42 Certified \| Reduce PFAS, PFOA/PFOS, Reduce Lead, Chlorine, Bad Taste, Enhanced Taste and Odor, No TDS Reduction](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [Waterdrop G5P700A Alkaline Mineral pH+ Reverse Osmosis Water Filter, 700GPD \| NSF/ANSI 58 & 372 Certified, 8-Stage RO Water Filtration System, 2:1 Pure to Drain, Tankless RO System with Smart LED Faucet](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)
- [Waterdrop 10UB-UF 0.01μm Ultra Filtration Under Sink Water Filter System \| Baçtёria Reduction, Reduce PFAS, PFOA/PFOS, Reduces Lead, Chlorine, Bad Taste, 11000 Gallon, with Dedicated Faucet](https://bargainpostbox.co.uk/visit/waterdrop-wd-10ub-uf-under-sink-water-filter)
- [Waterdrop 10UA Under Sink Water Filter System, 11000 Gallons Capacity \| Reduce PFOA/PFOS, Reduce Lead, Chlorine, Bad Taste, Odor, NSF/ANSI 42 Certified, Direct Connection to your Faucet](https://bargainpostbox.co.uk/visit/waterdrop-wd-10ua-under-sink-water-filter)
- [Frizzlife 600GPD Reverse Osmosis Water Filter System, Under Sink Tankless RO, Alkaline Mineral pH+, NSF/ANSI 42&58&372 Standards, Reduce TDS, 2:1 Pure to Drain, Smart LED Display, PD600-TAM3](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)

## Add-ons

- [Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System \| 1/4" & 3/8" Quick Connect Filter for RO Water Filter, Restore Essential Minerals, 9-12 Month Lifetime, 1 Pack](https://bargainpostbox.co.uk/visit/waterdrop-g3p600-tankless-reverse-osmosis-system)

## Images

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 1](https://bargainpostbox.co.uk/i/sNvspJvq6icSE-14B4ZP50wCv_PxCkCxL-mUDp5SKpR0zHWOimcdjb9_cRvDWYo9RtbUjLZW4SQbnx2u6TPo-SdIHUnZsps4jwlMo66gJ780eEL453gN.jpg)

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 2](https://bargainpostbox.co.uk/i/k9KLPeBFMwq8924Zc_yMaU7_KahcoKLwdqozeDjK4akm9f-A_rfCOdiaQ60xEByG3eP8J_UgoWF8erlI1DOvUbGtzQstMxVaUBtxPWEwLrIoOeRlpMvs.jpg)

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 3](https://bargainpostbox.co.uk/i/36OXBjG-BiesakQwSL8_Midzb4LuDegJ8P9YgF2vZQAp2ZIHli_5KLZ3g_vjTLecs1R3mW3B6vTxqLE31fYvqjsJN-3I5cen7_8RzUuDbMytaKChj3mA.jpg)

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 4](https://bargainpostbox.co.uk/i/IlkS4A7BvW2AuyhCBixPsSh7mozX_2_jI9O3dLEifuB_t8X4RNfiXaK3dygL98GgmuYtx6nXiHofs-U7YCaaUkqXtNaFDgEqTm9-luisCA8Lz5hMh6Xu.jpg)

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 5](https://bargainpostbox.co.uk/i/GrGfjlSf4MXnWu_KUN7tiKs92uxIDOdwEL-ncxF8wOFWgvzOuej1PzSB1HzzEiMlh3jVs1wM7Dzw8gpMAJJfwSLW56W4ai92uzRfIODr2uNXQ1u5ffTT.jpg)

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 6](https://bargainpostbox.co.uk/i/LeRjNQc6hRWEMuY77iIJELZQth4b6G9B6gLi55rcXvZ0kSLORHsSVwV6q55A3g4wmSgWqjrzu21zn-aD7Nogx9kVtkInFblrJH38QzrZDDTP6YwhN7Hd.jpg)

![Waterdrop G3P600 WD-G3P600 Tankless Reverse Osmosis System, 600 GPD — 7](https://bargainpostbox.co.uk/i/_Bl7nljs6Ds0IPTL2vktdUW8I4C1gx2xr_L0X9UJVfwWV1vjIz5_lEJzumb8V3nGdud55G6tKcRUZaRCgXeqZ3Q1-tNekmA0DDZy_9F2ZELz95nMAkNr.jpg)