iSpring RCC1UP Filtration System
- Filtration System
- 100 gallons
- Reverse Osmosis
- Under-Sink
- Better rated than 68%
A full under sink RO system with brass construction and a 100 gallon per day membrane rating, worth it if you want whole tap RO rather than a drop in cartridge.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 65 filtration systems we track
4.6★ across 106 Amazon ratings, Bayesian-smoothed toward the category average.
106 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
The iSpring RCC1UP is a complete under sink reverse osmosis system rated for 100 gallons a day, built with brass housing and fittings, measuring about 14.5 x 5.25 x 19 inches and weighing 35 lb.
Reverse osmosis systems push tap water through a semipermeable membrane to strip out dissolved solids, and iSpring uses brass rather than plastic on key connections here, which matters for long term seal durability under a cabinet. No seller description or reviews were supplied for this listing, so details beyond the spec sheet aren't confirmed.
- ISpring RCC1UP reverse osmosis system
- Brass housing and fittings
- Rated 100 gallons per day
- 14.5 x 5.25 x 19 in, 35 lb
Who it's for
Fits a household that wants a dedicated under sink RO system rather than a single inline cartridge, with the cabinet space and plumbing access a 19 inch tall unit requires. Not for renters or anyone wanting a countertop or faucet mount filter.
Strengths and trade-offs
Drawn from this product's published specifications.
- Brass construction on housing and fittings
- Rated for 100 gallons per day
- Relatively compact under sink footprint
- No performance data from buyers is available
- Requires under sink plumbing access to install
- 35 lb unit needs a stable mounting spot
Performance notes
RO capacity ratings are typically measured at ideal pressure and temperature, so actual daily output can run below the 100 gallon figure depending on your home's water pressure and dissolved solids level.
Specifications
| Brand | iSpring |
|---|---|
| Model | RCC1UP |
| Dimensions & fit | |
| Weight | 35 pounds |
| Dimensions | 14.5 × 5.2 × 19 inches |
| Capacity & performance | |
| Capacity | 100 gallons |
| Construction & materials | |
| Material | Brass |
| 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 RCC1UP Filtration SystemThis product | 4.6 / 5 | 106 | 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 RCC1UP
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is the iSpring RCC1UP a full RO system or just a filter?
It's a complete under sink reverse osmosis system, not a single replacement cartridge.
What is the RCC1UP made of?
Its housing and fittings are brass rather than plastic, per the listed specs.
How much space does it need under the sink?
About 14.5 x 5.25 x 19 inches and 35 lb, so it needs a stable spot with plumbing access.