1 / 7iSpring RCC100P 5-Stage Under-Sink Reverse Osmosis System, 100 GPD
Under-Sink: The iSpring RCC100P reverse osmosis system combines a five-stage filter with an electric booster pump and storage tank. Its stated 100 GPD capacity and pump-assisted design may suit homes with low inlet pressure, while the tank supplies stored water rather than filtering directly on demand.
At a glance
- Five-stage filtration includes three pre-filters, an RO membrane and a final GAC filter, according to the listing.
- An electric booster pump is intended to help maintain RO performance when inlet pressure is low. The manufacturer describes this as particularly useful below about 40 PSI.
- A pressurized storage tank holds filtered water for access at the faucet without waiting for each serving to be produced.
- The transparent first-stage housing allows visual inspection of the sediment filter.
Reference price: $310.49
Price checked: Nov 14, 2026
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Pros and cons
Pros
- Pump-assisted design addresses low household water pressure, a key consideration for RO systems.
- The storage tank provides a ready reserve of filtered water.
- The listed kit includes a faucet, tubing, pump, tank, filters and membrane.
Cons
- The under-sink system and storage tank require cabinet space, with listed dimensions of 19"L x 8"W x 14.5"H.
- Reverse osmosis relies on a storage tank, so it is not a tankless, direct-flow setup.
Technical specifications
14 specifications| Brand | iSpring |
|---|---|
| Model | Reverse Osmosis System |
| Filtration stages | 5-stage |
| Purification method | Reverse Osmosis |
| Stated output capacity | 100 GPD |
| Power configuration | Electric |
|---|---|
| Maximum supported water TDS | 750 |
| Upper temperature rating | 100 °F |
| Installation type | Under Sink |
|---|---|
| Dimensions listed | 19"L x 8"W x 14.5"H |
| Weight listed | 33.6 pounds |
| Material listed | RE |
|---|---|
| Special feature | Reduce TDS |
| Included components | 4 filters and 1 membrane, 1 tubing set, 1 faucet, 1 pump, 1 tank |
|---|
What to know before buying
Listing details to confirm
Listing details are inconsistent: the title identifies RCC100P, but the model number field says RCC1P and the model name is generic. The title and description claim 100 GPD, while the details list capacity as 100 gallons without a time period. The listed material is "RE," and the package-information field says "Bottle," neither of which clarifies the system's construction or packaging. Verify the selected listing's exact model and capacity details before buying. The claimed reduction percentages and contaminant list are manufacturer statements, not independent measurements. The page also gives different general claims, including up to 99% and up to 99.99%, without specifying matching conditions for each.
What’s in the box
Included- 4 filters
- 1 membrane
- 1 tubing set
- 1 faucet
- 1 pump
- 1 tank
Who is it for?
A good fit for
- Households seeking under-sink RO filtration with a storage tank and dedicated faucet.
- Homes with low inlet water pressure where an electric booster pump may support membrane operation.
- Buyers who want a visual view of the first-stage sediment filter housing.
Less suited to
- Buyers who need a compact countertop unit or a tankless system.
- Installations without room for an under-sink unit and its storage tank.
Customer reviews on Amazon
- 5 stars
83% 83% - 4 stars
11% 11% - 3 stars
2% 2% - 2 stars
0% 0% - 1 star
4% 4%
Customer feedback highlights satisfaction with water quality, taste, installation and flow, with reports describing the instructions as clear. Some feedback about pressure is mixed, which matters because consistent inlet pressure affects RO production. The manufacturer says this model includes a booster pump, but that claim does not establish how it will perform in a particular home's plumbing.
Positive themes
- Customers describe installation as easy and the instructions as clear.
- Customers report favorable water taste and flow. One customer reports about 6 gallons per hour.
Mixed feedback
- Pressure feedback is mixed, with some customers saying it is not great.
Frequently asked questions
Does the RCC100P include a storage tank?
The listed components include one tank, and the product description says the system stores filtered water in a pressurized tank.
Is this system intended for homes with low water pressure?
The listing describes an electric booster pump for pressure variations and says it is especially relevant when inlet pressure is below about 40 PSI.
What does the stated 100 GPD capacity mean?
The title and product description state 100 GPD. The details field instead says "100 gallons" without a time period, so confirm the capacity specification for the selected listing.
What is included?
The listed contents are four filters, one membrane, one tubing set, one faucet, one pump and one tank.
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