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GREATWELL MRO400 400 GPD RO Membrane Replacement 400 GPD Tankless Reverse Osmosis RO Water Filtration System - Stage 2
Regular price
$225.99
Sale price
$225.99
Regular price
$225.99
Unit price
per
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Features
Product Description
The RO membrane of ROG400 is made by GE and rated at 400 GPD, which provides up to 40 oz of filtered water within a minute, along with a 1.5:1 pure-to-drain ratio. It can remove up to 99% of over 1,000 contaminants including lead, fluoride, arsenic, asbestos, and more for up to 3 years.
- AvailabilityIn Stock
- Model MRO400
- Manufacturer iSpring
- Product Dimensions 13.2"L x 8.2"W x 7.0"H
- Product Weight 3.4 LB
iSpring vs Other Brands
Feature
NSF/ANSI 58 Certification
Yes (full system certified)
Often partial or none
Verified performance & safety
Filtration Stages
Clear 3/4/5/7 stage options
Usually 4-5 stages
More complete options
Alkaline Remineralization
Available (RCC7AK/RCC7AK-UV)
Rare or expensive add-on
Better taste & pH balance
See-through 1st Stage Housing
Yes, smart flow sensor
Unavailable in most systems
Easy visual inspection
Daily Production
75 GPD (reliable output)
Often lower or overstated
Reliable daily production
Replacement Filters
Widely available & affordable
Hard or harder to find
Lower long-term cost
Installation
DIY friendly, no plumber needed
Can be more complex
Faster & easier set-up
Support & Warranty
Responsive support + solid warranty
Varies widely
Better post-purchase experience
Value for Money
High performance at competitive price
Higher price for similar specs
Better cost-effectiveness