Frizzlife PD400 Tankless Reverse Osmosis System Review

Water is life. And although the water that runs into our taps appears safe and clean, experts are of a contrary opinion. They argue that it actually contains some degree of harmful contaminants that can endanger your health.

So, the best way to keep your family safe is by getting an RO system that will purify your water by removing chemicals and debris. And if thinking of getting one for your home, how about giving Frizzlife PD400 a try?

It is an excellent tankless RO system that eliminates 99% sediments, chlorine, fluoride, lead, other heavy metals, VOCs, and chloramine. In this review, we discuss its features, pros, and cons.

But before that, listed below are the key features of this system that can help you make a quick buying decision if in a hurry.

Frizzlife PD400 RO Filtration System Key Features at a glance

  • Innovative tankless design
  • 1.5:1 low drain ratio
  • 400 GPD water flow rate
  • Lead-free faucet
  • Smart filter life indicator and TDS meter
  • 3 stage composite pre-filter
  • micron RO membrane
  • Measures 19.6 x 19.4 x 8.1 inches
  • Weighs 23.72 pounds

Frizzlife Tankless Reverse Osmosis Drinking Water System Review, PD400

Frizzlife PD400 Tankless Reverse Osmosis Under Sink RO Filter System
  • Innovative Tankless Design

Frizzlife PD400 Ro system is different from other conventional reverse osmosis systems in that it doesn’t come with a bulky tank. It saves up to 70% space and fits most standard US cabinets.

And now that this is a no-tank system, you don’t have to worry about secondary pollution due to an unventilated tank.

  • Super Low Drain Ratio

Just like Frizzlife PD600, this system boasts a remarkable low drain ratio of 1.5:1. However, with it, you get to save 450% compared to traditional models that usually have a drain ratio of 1:3.

The system helps to save more water and makes water bills more affordable.

  • Fast Water Flow Rate

This system boasts an internal pump that assures fast and stable water flow. As a result, it has a fast water flow rate of 400 gallons per day, meaning that it can meet the daily water needs of most households and small companies. In addition, it produces instant fresh water and can fill a 330ml cup within 12 seconds.

  • Filtration Performance
Frizzlife PD400 Filtration Performance

With the help of a composite pre-filter and Ro membrane with a high filtration precision at 0.0001 microns, PD400 induces a deep 5-stage filtration mechanism. This mechanism can eliminate 1000+ harmful contaminants from the water.

The harmful contaminants include lead, chlorine, chloramine, fluoride, heavy metals, limescale, VOCs, TDS, arsenic, asbestos, and more.

  • Filter Life Monitor and TDS Meter

PD400 has color-coded indicators that remind you to change the filters in time. The package also comes with a 3rd party TDS pen.

To get the most accurate reading, allow the water to run for a while.

  • Multi-Usage

One thing you need to note about purified water from the Frizzlife RO system is that it even surpasses bottled water quality. Therefore, it is perfect for making coffee and tea, cooking, and other daily usages.

This system can simultaneously serve your sink and refrigerator with the help of an ice maker kit.

  • Installation
Frizzlife PD400 DIY Installation

All under sink RO systems require a hole in the sink or countertop for the dedicated filtered water faucet.

Besides that, the installation of this system is very easy and straightforward. With basic DIY skills, you can set it up within minutes. Also, with the help of a step-to-step instructional manual and tutorial video, everything becomes pretty easy.

  • Maintenance

Conventional RO systems require you to shut off the water supply, drain system and then remove the filter housing with special wrenches. Too much work, right? This isn’t the case with PD400.

This tankless unit presents the filters in the front of the system. All you need to replace the filters is to remove the faceplate, twist out the old filter, and twist in the new one.

Plus, the filter life indicators notify you when the filter nears the end of life or is due for replacement. For example, when there’s only 5% remaining of the filter, the indicator light blinks red. When 0% is left, the indicator light remains red, and you can hear an audible buzzer.

  • Product Summary

PD400 Frizzlife is a quality RO filtration system with a daily output of 400 gallons per day and 5 filtration stages. Since the system is tankless, it is easy to maintain under your sink.

The system also boasts a low drain ratio of 1.5: 1 hence highly efficient. It can serve big households and small companies.

This Frizzlife RO unit removes 99% of harmful contaminants from the water and filters a 300ml glass of pure in about 12 seconds. It is easy to install thanks to an easy-to-read manual and instructional video. It is also effortless to maintain.

Pros & Cons


  • Compact, tankless design
  • Smart filter life indicator
  • Fast flow rate of 400 GPD
  • 1.5: 1 Low water drain ratio
  • Easy installation and maintenance
  • Saves space under the sink
  • Long filter life
  • Makes water bill more affordable
  • Avoids secondary pollution


  • No smart faucet
  • Slow flow rate for the external ice maker
When you buy something through our affiliate links, we earn a commission without you having to pay extra.