Features
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Replacement Filters
- Filtration Stage
- First
- Second
- Third
- Fourth
- Filter Type
- Polypropylene
- Anti-Scale & Activated Carbon
- RO Membrane
- Alkaline
- Filter Function
- Removes Sediment & Particles
- Eliminates Scale & Chlorine
- Filters Down to 0.0001 Micron
- Remineralization
- Replacement Cycle
- Up to 12 Months
- Up to 12 Months
- Up to 24 Months
- Up to 12 Months
- Dimension
- 3.5" x 12"
- 3.5" x 12"
- 3.5" x 12"
- 3.5" x 12"
Product Description
The RO5004F-AK alkaline reverse osmosis water filter delivers a superior water filtration experience with its 7-layer system, ensuring clean water for your entire household. Its alkaline remineralization feature adds beneficial minerals back into your water, balancing the pH for healthier, spring-like water. Its tankless design maximizes under sink space while producing up to 500 GPD, enough to fill a cup in just 10 seconds. This high-efficiency under sink RO system features a built-in pump, allowing faster water flow even in areas with low water pressure. The pump operates with reduced noise for a more comfortable experience. This reverse osmosis system under sink also incorporates UV light technology for an extra layer of protection. The filter monitor provides timely reminders for filter replacements. The self-cleaning feature of the RO system under sink can prolong filter life while maintaining optimal filtration performance. In the unlikely event of a leak, the built-in leak-stop valve provides an extra layer of safety, making this RO water filtration system a highly reliable solution for clean water. Backed by our US-based team, it offers lifetime technical support for hassle-free operation.
- AvailabilityIn Stock
- Model RO5004F-AK
- Manufacturer iSpring
- Product Dimensions 15.2"L x 6.1"W x 16.6"H
- Product Weight 25.0 LB
Manuals
RO5004F Series Manual
Download
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


FP500
FC500SL
MRO5004F
FG500AK