iSpring RCC1P Filtration System
- Filtration System
- 100 gallons
- Reverse Osmosis
- Under-Sink
- Better rated than 80%
A capable under-sink RO system for households wanting deeper filtration than a pitcher or faucet filter provides, provided there is room and plumbing access below the sink.
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How it ranks among the 65 filtration systems we track
4.7★ across 90 Amazon ratings, Bayesian-smoothed toward the category average.
90 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 65 filtration systems we track - how the scorecard works · full filtration systems data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
An under-sink reverse osmosis filtration system rated for up to 100 gallons of output, built around iSpring's RE membrane material, sized 19 x 8 x 14.5 in and weighing 33.5 lb.
Reverse osmosis systems like this sit under the kitchen sink and tie into a dedicated faucet, pushing water through a semipermeable membrane to strip out dissolved solids. iSpring lists a 100 gallon capacity rating, which typically refers to membrane output before a filter change is needed rather than a single-use limit. The listing does not break out stage count or specific contaminants removed, so buyers wanting detailed contaminant claims should check iSpring's product documentation.
- Reverse osmosis purification
- 100 gallon rated capacity
- Under-sink installation
- 19 x 8 x 14.5 in footprint
Who it's for
Homeowners with under-sink space who want reverse osmosis filtration rather than a basic carbon filter. Less suited to renters or anyone unwilling to drill a faucet hole for a dedicated RO tap.
Strengths and trade-offs
Drawn from this product's published specifications.
- Reverse osmosis filtration, not just carbon
- Rated to 100 gallons of output
- Under-sink install keeps it out of sight
- Requires under-sink plumbing space and a drilled faucet hole
- No stage count or contaminant list given
- At 33.5 lb it is heavier to install than a simple filter
Performance notes
Reverse osmosis forces tap water through a membrane under pressure, which is the step that removes dissolved minerals and many contaminants that carbon filtration alone leaves behind. The 100 gallon capacity figure marks how much filtered water the system is rated to produce before service is due.
Specifications
| Brand | iSpring |
|---|---|
| Model | RCC1P |
| Dimensions & fit | |
| Weight | 33.5 pounds |
| Dimensions | 19 × 8 × 14.5 inches |
| Capacity & performance | |
| Capacity | 100 gallons |
| Construction & materials | |
| Material | RE |
| Compatibility & installation | |
| Install Type | Under-Sink |
| Other details | |
| Purification | Reverse Osmosis |
Other iSpring filtration systems
How it compares
This product against the closest alternatives we track in filtration systems.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| iSpring RCC1P Filtration SystemThis product | 4.7 / 5 | 90 | 3.7 / 5 |
| Waterdrop WD-TSU Filtration SystemWaterdrop | 4.5 / 5 | 3,347 | 4.4 / 5 |
| Aqua Crest AQ-5KDC Filtration SystemAqua Crest | 4.4 / 5 | 1,300 | 4.3 / 5 |
| Apec Water WFS-1000 Filtration SystemApec Water | 4.3 / 5 | 1,500 | 4.2 / 5 |
| Bluevua A-JSJ-LPD-100UV-BMT Filtration SystemBluevua | 4.4 / 5 | 1,356 | 4.0 / 5 |
Similar filtration systems from other brands
Questions about the iSpring RCC1P
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What type of filtration does the iSpring RCC1P use?
It uses reverse osmosis, which pushes water through a membrane to remove dissolved solids beyond what carbon filtration alone catches.
How is the iSpring RCC1P installed?
It is an under-sink system, installed in the cabinet below the kitchen sink with a dedicated faucet.
How much water is the system rated to filter?
The listing rates it for up to 100 gallons of output.