iSpring RO5004F-AK — 500 GPD Alkaline Tankless RO with UV
High-capacity tankless RO with built-in UV, a booster pump, and alkaline remineralization. 500 GPD on demand — no tank.
Our most feature-complete under-sink RO, and the only one we sell with built-in UV. A 4-stage tankless design (500 GPD, 2:1 pure-to-drain) with a built-in booster pump for low water pressure, a leak-stop auto shutoff, a filter-life monitor, and alkaline remineralization.
Features
What you get
- 500 GPD tankless design — no tank, 2:1 pure-to-drain
- Built-in UV (rated up to 8,000 working hours) — the only under-sink RO we carry with UV
- Built-in booster pump for low water pressure (common in Baja)
- Leak-stop auto shutoff valve
- Filter-life monitor
- Alkaline remineralization (FG500AK)
System Specifications
Specs
- Model
- iSpring RO5004F-AK
- Stages
- 4 (FP500 sediment, FC500SL anti-scale carbon, MRO5004F membrane, FG500AK alkaline)
- Capacity
- 500 GPD (tankless)
- Efficiency
- 2:1 pure-to-drain
- UV
- Built-in, rated up to 8,000 working hours (sealed unit, not a user-replaceable lamp)
- Booster pump
- Built-in (for low feed pressure)
- Extras
- Leak-stop auto shutoff + filter-life monitor
- Tank
- None (tankless on-demand)
How It Works
Three stages
- 1
Pre-filtration + booster
Water passes through the FP500 sediment and FC500SL anti-scale carbon filters to remove particles, chlorine, and scale. A built-in booster pump keeps the system running well even where feed pressure is low.
- 2
Reverse osmosis
The MRO5004F membrane removes dissolved contaminants including lead, fluoride, arsenic, and TDS, at 500 GPD with a 2:1 pure-to-drain ratio.
- 3
Alkaline + UV
The FG500AK filter adds calcium and magnesium back and raises pH, and a built-in UV stage (rated up to 8,000 working hours) provides an added barrier. The UV is a sealed unit, not a user-replaceable lamp. A leak-stop valve and filter-life monitor round out the system.
What's Included
Everything you need for clean water
RO system
iSpring RO5004F-AK 500 GPD tankless reverse osmosis system with built-in UV, booster pump, leak-stop, and alkaline remineralization
Designer faucet
Designer faucet included
Professional installation
Under-sink installation by our certified local technicians
Free water test
Comprehensive in-home water quality test
Setup & calibration
Full system setup, TDS testing, and leak check
Satisfaction guarantee
30-day satisfaction guarantee
Why This System?
The most feature-complete under-sink RO we carry, and the only one with built-in UV. 500 GPD tankless on demand, plus a built-in booster pump for the low water pressure common in Baja, a leak-stop auto shutoff, a filter-life monitor, and alkaline remineralization. Ideal for families who want everything in one system.
Every system includes a 30-day satisfaction guarantee and is eligible for our BWS Care plans — scheduled filter changes and full system inspections, with UV that needs no bulb or sleeve replaced.
Comparing options? See all Reverse Osmosis tiers side by side.
Compare Reverse OsmosisMaintenance
How Often Should I Replace My RO Filters?
Local water quality means RO pre-filters and membranes work harder here than they would up north. We recommend replacing your RO filters every 6 months to keep your drinking water clean and protect the membrane, which is the most expensive part of the system. With an RO Care Plan both swaps a year are handled for you. The filters and the two service visits are included, so your drinking water stays pure year-round and you never track the schedule or source filters yourself.
Explore Care PlansWant this system installed?
Tell us about your home and we'll send a quote within 24 hours.