iSpring WRO4000 6-Stage Whole House Reverse Osmosis System, Reduces TDS, Heavy Metals, PFAS, Fluoride, and 1000+ Contaminants, Auto-tune with Smart Sensors, 2:1 Pure to Drain, Up to 4000 GPD

$8,499.99
$8,499.99 $8,999.99
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iSpring WRO4000 6-Stage Whole House Reverse Osmosis System, Reduces TDS, Heavy Metals, PFAS, Fluoride, and 1000+ Contaminants, Auto-tune with Smart Sensors, 2:1 Pure to Drain, Up to 4000 GPD
$8,499.99$8,999.99
Save $500.00
iSpring WRO4000 6-Stage Whole House Reverse Osmosis System, Reduces TDS, Heavy Metals, PFAS, Fluoride, and 1000+ Contaminants, Auto-tune with Smart Sensors, 2:1 Pure to Drain, Up to 4000 GPDiSpring WRO4000 6-Stage Whole House Reverse Osmosis System, Reduces TDS, Heavy Metals, PFAS, Fluoride, and 1000+ Contaminants, Auto-tune with Smart Sensors, 2:1 Pure to Drain, Up to 4000 GPD

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

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