iSpring RO5004F Water Filtration System
- Capacity: 500 gallons
- Purification: Reverse Osmosis
- Install Type: Under-Sink
- Material: Metal
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A conventional metal-housed under-sink RO system with a 500-gallon filter life, worth considering where under-sink space and a dedicated tap are already accounted for.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0DWZ6P9SKModel: RO5004FCategory: Water Filtration Systems
Overview
ISpring's RO5004F is an under-sink reverse osmosis system rated for 500 gallons of filtered output, built into a metal housing sized to fit inside a typical kitchen cabinet. It targets households replacing a countertop pitcher with a dedicated RO tap.
The 500-gallon rating describes total filtered volume before the RO membrane needs replacing, not a daily flow rate, so actual replacement timing depends on household usage. As an under-sink unit it plumbs into the cold water line and typically pairs with a separate dispenser faucet, though faucet inclusion is not confirmed in the listed specs.
- Reverse osmosis purification
- 500-gallon capacity
- Under-sink install
- Metal housing, 6.8 lb
Who it's for
Suits homeowners with under-sink space who want reverse osmosis filtration piped to a dedicated tap rather than a countertop unit. Renters without permission to drill a faucet hole, or anyone wanting a grab-and-go pitcher, should look elsewhere.
Pros and cons
- Under-sink install keeps the unit out of sight
- Metal housing at a compact 15.2 x 6.1 x 16.6 in footprint
- 500-gallon rated capacity before membrane replacement
- Requires under-sink plumbing space and installation
- No dispenser faucet details given in the listed specs
Performance notes
Reverse osmosis systems in this class force water through a semipermeable membrane, removing dissolved solids that carbon-only filters leave behind, at the cost of a slower flow rate. The 500-gallon capacity marks when the membrane stage needs replacing to keep rejection rates up.
Specifications
| Brand | iSpring |
|---|---|
| Model | RO5004F |
| Dimensions & fit | |
| Weight | 6.8 poundslower than 73% of 41 water filtration systems |
| Dimensions | 15.2 × 6.1 × 16.6 inches |
| Dimensions | 15.2 x 6.1 x 16.6 in |
| Capacity & performance | |
| Capacity | 500 gallonshigher than 82% of 46 water filtration systems |
| Construction & materials | |
| Material | Metal |
| Compatibility & installation | |
| Install Type | Under-Sink |
| Other details | |
| Purification | Reverse Osmosis |
Closest rivals on specs
Waterdrop WD-T4-A Alkaline Reverse Osmosis System 450 GPD- Capacity 500 vs 450 gallons (+11%)
- Weight 6.8 vs 24.21 pounds (-72%)
Ecoviva WP-RO-600G-W Water Filtration System- Capacity 500 vs 600 gallons (-17%)
- Weight 6.8 vs 25 pounds (-73%)
Waterdrop G5P700A-PRO Alkaline Reverse Osmosis System- Capacity 500 vs 700 gallons (-29%)
- Weight 6.8 vs 21.4 pounds (-68%)
Frequently asked questions
What does the 500-gallon rating mean for the iSpring RO5004F?
It is the total filtered water volume the reverse osmosis membrane is rated to produce before it needs replacing, not a daily output figure.
Does the RO5004F need under-sink space?
Yes, it is designed as an under-sink install and connects to the cold water line inside a cabinet.
What is the RO5004F's housing made of?
Metal, in a 15.2 x 6.1 x 16.6 in footprint weighing 6.8 lb.