PuROTwist 4000 RO System Review

The newly-upgraded PuROTwist Reverse Osmosis system features a high-efficiency 75 GPD membrane with a 50% recovery rate, achieving a 1:1 waste-water ratio.

Typical RO systems have a waste water ratio of 4:1, meaning it requires four gallons of water to produce one gallon of treated water, making the systems very inefficient compared to the new PuROTwist 4000. This eco-friendly, high-efficient version of the PuROTwsit is exclusively sold through ESP Water Products

The PuroTwist 4000T75 delivers high-quality water, features an automatic shut-off and is easy to maintain. With the Twist Tap (Omnipure Q-Series) filters, you can simply twist off the old filter and twist on the new one, with no tools or mess.

The 4-stage, point-of-use system treats up to 75 gallons per day and includes a designer chrome air gap faucet, convertible to a non-air gap faucet.

Viqua VIQUA IHS22-D4 Integrated 12 GPM UV System with Sediment and Carbon with Lead Reduction Filters IHS22-D4-

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Pros of the PuROTwist RO System

✅ User Friendly: Filters are easy to replace with twist-off, quick-change filter design.

✅ Conserves Water: RO recovery rate of 1:1 rather than the typical 4:1 waste water ratio.

✅ ANSI/NSF Standards: Conforms to ANSI/NSF standards 58 for performance claims as verified and sustained by test data.

✅ Designer Faucet: System comes with a designer chrome faucet and and an adaptor for non-air gap faucet.

✅ Greater Contaminant Reduction: Includes a chloramine reduction filter that can reduce chlorine, chloramine and PFAS more effectively.

✅ Economical Replacements: The availability of cost-effective replacement filters can help to keep ongoing maintenance costs low.

✅ Outstanding Taste: Removes impurities such as sediment, lead, VOCs, chlorine and more for enhanced flavor of drinking water.

Cons of the PuROTwist RO System

❌ Fewer Filtration Stages: The system includes four stages of filtration instead of five stages.

❌ Required Maintenance: Filter housings should be cleaned at time of filter changes.

❌ Flow Rate: Water flows through 3/8" tubing to the faucet.

Quick Look at the PuROTwist 4000 RO System

The PuROTwist under-sink RO system is a popular, high-performing system:

1. 1. The PuROTwist 4000 RO system features "quick-connect" filters to make filter changes fast and easy.
  2. With four stages of filtration, the PuROTwist can significantly enhance the taste, odor, and overall quality of your drinking water by removing up to 99% of impurities and pollutants including Barium, Cadmium, Pesticides, Chromium VI, Copper, Fluoride, Lead, Mercury, Nitrate, Radium, Selenium, TDS (total dissolved solids). The system's chloramine reduction filter removes not only chlorine and chloramine, but also reduces PFAS more effectively.
  3. The PuROTwist (PT400075) is an eco-friendly water filter as it conserves water with a 1:1 recovery rate rather than the typical 4:1 water waste ratio.
  4. This point-of-use reverse osmosis system is manufactured in the U.S.A.
  5. The PuROTwist 4000 has an automatic shut-off feature which signals the system to stop making water until more is needed.
  6. High-capacity filtration produces 75 gallons of water per day, which means you'll have plenty of drinking water for your family or cooking needs.
  7. Comes with a designer chrome faucet with adapters to be used as an airgap or non-airgap system.

Benefits of PuROTwist RO Filtration System


Easy to install and maintain with twist-on, twist-off filter replacements	Clean, filtered water convenient at kitchen RO faucet
Better-tasting soups, sauces and meals	Wastes less water with a 1:1 water recovery ratio rather than typical 4:1 ratio
Delicious, fresh drinking water	Saves money over buying bottled water
Comes with designer chrome faucet	Clear, harder ice cubes

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PuROTwist 4000 RO System

PuROTwist 4000 RO water filter system offers the highest of quality and performance standards. In addition, the system conserves water with a 1:1 recovery rate--a big improvement from the typical 4:1 waste water ratio of other RO systems.

The high-capacity (75 GPD) reverse osmosis system features quick-connect filters that make it easy to replace filters. The system's automatic shut-off feature signals the RO unit to stop making water until more is needed.

PuROTwist 4000 RO System FAQs

Which replacement filters do I need for the PuROTwist 4000 RO system?

The PuROTwist 4000 RO system takes Ominipure Q-series filters. Their twist on/twist off style makes filter replacement easy. While the system's three filters should be replaced every 6-12 months, depending on water quality and household usage, the RO membrane only needs to be replaced every two years. Our replacement parts page for the PuROTwist 4000 includes the filter kit with just the 3 filters for annual replacement, or the complete filter kit that includes the RO membrane, since the membrane only needs replacement every 2 years.

What Contaminants does the PuROTwist 4000 Remove?

Your PuROTwist 4000 reverse osmosis filters and membrane can remove common pollutants from water including lead, pesticides, sulfates, fluoride, nitrates, chlorine, pharmaceuticals, Arsenic V, PFOS, and much more. The RO system's carbon filter will also remove chloramines and chlorine. Learn more about what contaminants can be removed with reverse osmosis filtration.

Top-Selling Reverse Osmosis Drinking Water Systems


Sold out	Sold out	Sold out
Proven, High-Quality System	Compact, Space-Saving Design	Eco-Friendly System Conserves Water
Designer Chrome Faucet	Standard Chrome Faucet	Designer Chrome Faucet
High-Flow 3/8" Tubing to Faucet	High-Flow 3/8" Tubing to Faucet	High-Flow 3/8" Tubing to Faucet
4-Stages of Filtration	4-Stages of Filtration	4-Stages of Filtration
Compact 3.2 Gallon Storage Tank	Standard 4.4 Gallon Storage Tank	Standard 4.4 Gallon Storage Tank
Airgap and Non-Airgap Faucet Connection	Airgap Faucet Connection	Non-Airgap Faucet Connection
50 Gallons Per Day	50 Gallons Per Day	75 Gallons Per Day
Made in USA	Designed in USA, Made in China	Made in USA
Free Shipping	Free Shipping	Free Shipping