iSpring RO5004F 6-Stage Tankless Reverse Osmosis System with UV, 500 GPD
Six-stage tankless RO system rated at 500 GPD with a UV stage, filter-life monitor and 2:1 pure-to-drain ratio; SGS tested for PFAS and TDS, not NSF certified.
$330
Usability
The RO5004F packs the most stages in iSpring's tankless line, adding an anti-scale filter and a UV lamp on top of the standard RO path, plus a filter-life monitor, at well under the price of the RO500. The tradeoff is certification: it is SGS tested for PFAS and TDS but carries no NSF/ANSI certification, so its numbers are lab claims rather than NSF-certified reductions.
- Six stages including anti-scale and a UV lamp for microbiological targeting
- Tankless 500 GPD flow with a 2:1 pure-to-drain ratio
- Filter-life monitor and leak-stop valve built in
- Notably cheaper than the RO500 despite more stages
- SGS-tested for PFAS and TDS reduction
- Lightest unit in the tankless line at 15 lb
- No NSF/ANSI certification; reductions are lab and manufacturer claims
- UV lamp is a consumable rated to ~8,000 hours and must be replaced
- More stages mean more cartridges to track and buy
- Requires an under-sink electrical outlet
- Municipal water only
- Assembled in China
The iSpring RO5004F is a six-stage tankless reverse osmosis system rated at 500 GPD with a built-in UV lamp. Water moves through a PP sediment filter, an anti-scale filter, a CTO carbon filter, a 0.0001-micron RO membrane, a taste-polishing CTO filter, and a final UV stage rated for up to 8,000 working hours.
It is pump-driven and tankless at roughly a 2:1 pure-to-drain ratio, with a filter-life monitor, leak-stop valve and self-cleaning function. iSpring reports the system is SGS tested for PFAS and TDS reduction; it does not carry NSF/ANSI certification, so its contaminant figures are manufacturer and third-party lab claims rather than NSF-certified reductions.
The UV stage targets microbiological safety that a standard RO membrane is not certified to address. It requires electricity and is intended for municipal tap water.
Additional information
Specification: iSpring RO5004F 6-Stage Tankless Reverse Osmosis System with UV, 500 GPD
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