GREATWELL ROG400 Tankless Reverse Osmosis Water Filtration System with 400 GPD RO Filter 1.5:1 Pure to Drain Ratio and Drinking Water Faucet
$598.99
About this item
- ROG400 is a tankless reverse osmosis system. The vertical filter placement design saves more than 30% of space under the sink compares to a horizontal design. A leak-free integrated water route and filter change indicator.
- The PAC filter is a combination of two sediment filters and a carbon filter that removes sand, rust, chlorine, odor, and smell. The RO membrane removes up to 99% of over 1,000 contaminants, including PFAS, lead, fluoride, arsenic, asbestos, and more for up to 3 years. The AC or the active carbon filter made from coconut shell further polishes water removing odor and bad taste.
- With a built-in water pump and GE reverse osmosis membrane rated at 400 GPD, the water flow rate from ROG400 is at 0. 3-0. 4 gal./min., with a pure to wastewater ratio (up to 1.5 : 1).
- DIY installation and future filter replacement. The unit can be connected to the ice maker/refrigerator. It includes an artisan-style stainless steel drinking water faucet.
- At GreatWell, we only use quality components tested by an independent 3rd party against NSF/ANSI standards. Lifetime technical support provided by our dedicated support team based in Atlanta, GA.
Frequently Bought Together

GREATWELL Tankless Reverse Osmosis Water Filtration System with 400 GPD RO Filter 1.5:1 Pure to Drain Ratio and Drinking Water Faucet
$598.99
- Availability: In Stock
- Model: ROG400
- Manufacturer: iSpring
Write Review
Ashley Hobbs | 
2017-04-27
OMG. I wish Id bought this when we moved into our rural home 2.5 years ago. We have well water and even with a good water softener we have a strong mineral taste in our water. Its fine for cooking, bathing, etc., but we use a Brita filter/pitcher for drinking water. Between the cost of multiple pitchers, numerous fires, and distilled water for my CPAP, we could have broken even on this system by now AND had years of far better and more convenient water. It was straightforward to install with very basic hand tools and an electric drill. Simply couldnt be happier with the system. Numbers: 995 ppm before the iSpring system, 40 ppm after.

2017-04-27
OMG. I wish Id bought this when we moved into our rural home 2.5 years ago. We have well water and even with a good water softener we have a strong mineral taste in our water. Its fine for cooking, bathing, etc., but we use a Brita filter/pitcher for drinking water. Between the cost of multiple pitchers, numerous fires, and distilled water for my CPAP, we could have broken even on this system by now AND had years of far better and more convenient water. It was straightforward to install with very basic hand tools and an electric drill. Simply couldnt be happier with the system. Numbers: 995 ppm before the iSpring system, 40 ppm after.
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ROG400 Manual