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These are the best iSpring reverse osmosis systems, ranked by published specifications. The range includes under-sink units, countertop models, and whole-house UV filters. The iSpring RCC7-BN 75 GPD Under Sink RO leads because it fits standard under-sink drinking water needs. We compared 14 products. Our picks rely strictly on the specs found on the listings. This approach helps you find the right size and flow rate for your home.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | iSpring RCC7-BN 75 GPD Under Sink RO Best overall | standard under-sink drinking water needs | |
| 2 | iSpring T20M 20 Gallon RO Storage Tank Also great | High-volume under-sink water storage | |
| 3 | iSpring RO500AK-ORB 500 GPD Alkaline RO Best premium | High-output under-sink alkaline RO | |
| 4 | iSpring PH100 100 GPD Alkaline RO Best 1:1 pure to drain | water efficiency and taste | |
| 5 | iSpring RCC7P-AK Alkaline RO Also great | Low-pressure homes wanting alkaline water | |
| 6 | iSpring UVF20 Whole House UV System Best whole house | whole house microbial protection | |
| 7 | iSpring US31KF-BV Bacteria Removal Filter Best budget | Bacteria removal without mineral reduction | |
| 8 | iSpring RCB3P 300 GPD Tankless RO Also great | High-flow tankless under-sink filtration | |
| 9 | iSpring RCC7D 75 GPD RO/DI Best chlorine | aquariums, labs, and ice makers | |
| 10 | iSpring RO800G Tankless 800 GPD Best 800 gpd | High-demand households needing tankless water | |
| 11 | iSpring RCC7P 75 GPD RO System Also great | steady flow and efficiency | |
| 12 | iSpring RCD100 Countertop RO System Best countertop | renters needing hot filtered water | |
| 13 | iSpring RCC7AK-UVF3 7-Stage Under Sink Best 7-stage | 7-stage filtration with UV and alkaline stages | |
| 14 | iSpring RCC1UP 100 GPD Under Sink RO Also great | UV purification and quiet under-sink installation |
01 iSpring RO Systems by Specs
You can group these units by installation type and filtration stages. The iSpring RCC7-BN 75 GPD Under Sink RO offers a standard 5-stage setup for typical households. If you need higher output without a tank, the iSpring RO800G Tankless 800 GPD delivers fast flow. For comprehensive treatment, the iSpring RCC7AK-UVF3 7-Stage Under Sink adds UV and alkaline stages.
Other shoppers may prioritize water efficiency or specialized use. The iSpring PH100 100 GPD Alkaline RO maintains a 1:1 pure to drain ratio. The iSpring RCC7D 75 GPD RO/DI targets chlorine and lead for labs. Whole-house needs are met by the iSpring UVF20 Whole House UV System. Countertop renters might prefer the portable iSpring RCD100 Countertop RO System.
iSpring RCC7-BN 75 GPD Under Sink RO
Best for: standard under-sink drinking water needs
- Installation Type
- Under Sink
- Daily Production Rate
- 75 GPD
- Filtration Stages
- 5-Stage
- Certifications
- NSF/ANSI 58
- Faucet Finish
- Brushed Nickel
- Use
- Drinking Water
The iSpring RCC7-BN is a 5-stage under-sink reverse osmosis system producing 75 gallons per day. It holds NSF/ANSI 58 certification and removes up to 99% of contaminants, including lead and PFAS. The unit measures 18 by 15 by 8 inches and weighs 27.5 pounds. It includes a brushed nickel faucet. This system suits households needing reliable, certified drinking water without a large footprint.
- NSF/ANSI 58 certified for contaminant reduction
- 75 GPD daily production rate
- 5-stage filtration removes 99% of impurities
- Compact 18 by 15 by 8 inch design
- 75 GPD output is lower than the 500 GPD and 800 GPD models on this list
- 27.5 pound weight is heavier than the tankless 300 GPD and 800 GPD options
- 5-stage filtration has fewer stages than the 6-stage and 7-stage variants available
- You need NSF/ANSI 58 certification for your water system
- You have standard under-sink space for a 75 GPD system
- You want a proven 5-stage reverse osmosis setup
- You require a production rate above 75 GPD
- You prefer a tankless installation to save space
- You want alkaline remineralization or UV purification stages
Verdict: iSpring RCC7-BN 75 GPD Under Sink RO is a compact, certified choice for standard households that do not need high-volume or tankless filtration. It fits under most sinks and delivers reliable, NSF-certified water.
iSpring T20M 20 Gallon RO Storage Tank
Best for: High-volume under-sink water storage
- Certifications
- NSF and ANSI Standards
- Dimensions
- 16 × 16 × 30 inches
- Weight
- 32 pounds
This is the iSpring T20M pre-pressurized tank, designed to store up to 20 gallons of filtered water. It holds 14 gallons of usable water and meets NSF and ANSI standards for material quality. The unit measures 16 by 16 by 30 inches and weighs 32 pounds. It includes a shut-off valve, connector, and stand. You can place it vertically or horizontally to fit your under-sink space.
- 20-gallon capacity with 14 gallons of storage
- NSF and ANSI certified materials
- Includes valve, connector, and stand
- Flexible vertical or horizontal placement
- 32-pound weight requires sturdy mounting
- 30-inch height needs significant clearance
- Limited to 14 gallons of usable water
- You need high-volume water storage for your RO system
- You have vertical space under your sink
- You want a certified tank with included hardware
- You have limited vertical clearance under the sink
- You need a tankless system to save space
- You cannot support a 32-pound unit
Verdict: iSpring T20M 20 Gallon RO Storage Tank fits households needing large stored water volumes. It suits those with deep under-sink cabinets who can accommodate its height and weight.
iSpring RO500AK-ORB 500 GPD Alkaline RO
Best for: High-output under-sink alkaline RO
- Installation Type
- Under Sink
- Daily Production Rate
- 500 GPD
- Pure to Drain Ratio
- 2:1
- Remineralization
- Alkaline remineralization
- Features
- Tankless, Alkaline
- Dimensions
- 17.5 × 5.2 × 16.3 inches
This iSpring system produces 500 gallons per day with a 2:1 pure-to-drain ratio. It holds NSF/ANSI 58 certification for TDS reduction and includes an alkaline remineralization filter. The tankless design saves under-sink space. It delivers up to 0.4 GPM flow. You get a 1-year warranty and lifetime technical support. It suits households needing high daily output without a storage tank.
- NSF/ANSI 58 certified for TDS reduction
- 500 GPD daily production rate
- 2:1 pure-to-drain water ratio
- Alkaline remineralization filter included
- Tankless design saves space
- Requires access to electricity
- Heavier build at 28 pounds
- 1-year warranty period
- You need high daily water output
- You want NSF/ANSI 58 certification
- You prefer tankless under-sink installation
- You have no electrical outlet under the sink
- You need a longer than 1-year warranty
- You prefer a countertop unit
Verdict: iSpring 500 GPD Alkaline RO System fits users who need high daily output and certified safety without a storage tank. It is a solid choice for under-sink installation where electricity is available.
iSpring PH100 100 GPD Alkaline RO
Best for: water efficiency and taste
- Installation Type
- Under-sink
- Daily Production Rate
- 100 GPD
- Filtration Stages
- 6-stage
- Pure to Drain Ratio
- 1:1
- Remineralization
- Alkaline remineralization
- Use
- Drinking Water
The iSpring PH100 is a 6-stage under-sink reverse osmosis system with a 100 GPD production rate. It features a 1:1 pure to drain ratio, reducing water waste during filtration. An alkaline remineralization stage restores healthy minerals and improves taste. The system includes a brushed nickel faucet and US-made filters. It fits under standard kitchen sinks and offers easy DIY installation with included tools.
- 1:1 pure to drain ratio minimizes water waste
- 100 GPD daily production rate for steady supply
- 6-stage filtration includes alkaline remineralization
- Brushed nickel all-metal faucet included
- 100 GPD capacity is lower than 300 GPD or 800 GPD models
- 16 x 17.5 x 19 inch footprint requires under-sink space
- 1-year manufacturer warranty is shorter than lifetime support offers
- You want to reduce wastewater during reverse osmosis filtration
- You prefer alkaline water for better taste
- You have space under a standard kitchen sink
- You need high-volume production for large households
- You prefer tankless systems for space saving
- You want a countertop installation option
Verdict: The iSpring PH100 100 GPD Alkaline RO is ideal for households prioritizing water efficiency and taste. Its 1:1 ratio and remineralization stage make it a practical choice for daily drinking water needs.
iSpring RCC7P-AK Alkaline RO
Best for: Low-pressure homes wanting alkaline water
- Installation Type
- Under Sink
- Filtration Stages
- 6-Stage
- Remineralization
- Alkaline Remineralization
- Faucet Finish
- Brushed Nickel
- Use
- Drinking Water
- Dimensions
- 14.5 × 5.25 × 19 inches
The iSpring RCC7P-AK is a 6-stage under-sink reverse osmosis system with an alkaline remineralization stage. It includes a booster pump to maintain performance in low-pressure homes. The unit reduces over 1,000 contaminants and balances pH for better taste. It weighs 20 pounds and measures 19 inches in height. This system suits you if you want enhanced mineral content and consistent flow rates.
- 6-stage filtration with alkaline remineralization
- Built-in booster pump for low water pressure
- Reduces over 1,000 contaminants including lead and PFAS
- Transparent first-stage housing for easy monitoring
- Heavier build at 20 pounds compared to tankless models
- Requires electrical outlet for the booster pump
- Standard 75 GPD capacity is lower than high-flow options
- You have low water pressure and need a booster pump
- You prefer alkaline water with balanced pH
- You want a traditional under-sink system with a storage tank
- You need a tankless design for limited under-sink space
- You want a higher flow rate than 75 gallons per day
- You prefer a system that does not require electricity
Verdict: iSpring RCC7P-AK Alkaline RO System offers reliable filtration and improved taste for homes with low pressure. It fits you if you value alkaline water and do not mind the weight and power requirement of a tank-based system.
iSpring UVF20 Whole House UV System
Best for: whole house microbial protection
- Installation Type
- Whole House
- UV Purification
- LED UV
- Features
- UV Filter
- Port Size
- 3/4-Inch
- Dimensions
- 3.3 × 5.5 × 14.2 inches
- Weight
- 3.4 pounds
The iSpring UVF20 is a whole house ultraviolet water filter designed for high flow rates up to 12 GPM. It uses a mercury-free LED UV module rated for up to 8,000 hours, which translates to about 11 years of service with typical daily use. The system features a built-in automatic flow sensor that activates only when water is flowing. It reduces microorganisms by 99.99% and connects via 3/4-inch MNPT fittings. This unit suits homes needing broad microbial protection without bulb replacements.
- High flow rate of up to 12 GPM
- LED UV module lasts up to 11 years
- Automatic flow sensor saves energy
- Mercury-free and chemical-free operation
- Lighter weight at 3.4 pounds may feel less substantial than heavy-duty metal housings
- Narrower port size of 3/4-inch limits compatibility with larger 1-inch plumbing systems
- Single style option for 12 GPM excludes higher flow variants
- You need whole house microbial reduction for well or municipal water
- You want a maintenance-free UV system with no bulb changes
- You have standard 3/4-inch plumbing connections
- You require a flow rate higher than 12 GPM
- You need a system for point-of-use under sink installation only
- You prefer mercury-based UV lamps for specific technical reasons
Verdict: The iSpring UVF20 Whole House LED UV Filter offers long-lasting microbial protection with minimal maintenance. It fits homeowners who need high flow rates and standard plumbing connections for whole house treatment.
iSpring US31KF-BV Bacteria Removal Filter
Best for: Bacteria removal without mineral reduction
- Installation Type
- Under-Sink
- Filtration Stages
- 3-Stage
- Certifications
- NSF/ANSI Compliant
- Target Contaminant
- Rust
- Application
- Kitchen
- Dimensions
- 13 × 14.5 × 6 inches
The iSpring US31KF-BV is a 3-stage under-sink water filter designed to reduce bacteria, viruses, chlorine, and VOCs. It uses a transparent housing to show filter buildup and retains beneficial minerals unlike RO systems. The unit measures 14.5 by 13 by 6 inches and weighs 12.2 pounds. It connects via standard 3/8-inch fittings without drilling. This system suits those seeking targeted contaminant removal while keeping minerals in the water.
- 3-stage filtration reduces bacteria and viruses
- Transparent housing shows real-time filter status
- Retains beneficial minerals in water
- Standard 3/8-inch compression fittings for easy install
- Heavier at 12.2 pounds compared to lighter tankless options
- Smaller 3-stage design versus 5- or 6-stage RO systems
- Requires more installation effort than twist-on filters
- You want to reduce bacteria without lowering TDS
- You prefer visible filter status changes
- You need a compact under-sink unit
- You require reverse osmosis purification
- You want a tankless system
- You need alkaline remineralization
Verdict: iSpring US31KF-BV Bacteria Removal Filter is a practical choice for households wanting targeted bacterial reduction while keeping minerals. It fits under-sink spaces where standard fittings are available.
iSpring RCB3P 300 GPD Tankless RO
Best for: High-flow tankless under-sink filtration
- Installation Type
- Under Sink
- Daily Production Rate
- 300 GPD
- Pure to Drain Ratio
- 1.5:1
- Features
- Tankless, Booster Pump
- Dimensions
- 19.5 × 11 × 28 inches
- Weight
- 52 pounds
The iSpring RCB3P is a tankless under-sink reverse osmosis system designed for high daily output. It produces 300 gallons per day with a 1.5:1 pure-to-drain ratio. The unit includes a booster pump to increase water pressure and purification speed. Its stainless steel frame and metal bracket protect the system during installation. This model suits users who need steady flow without a storage tank.
- Produces 300 gallons of purified water daily
- Efficient 1.5:1 pure-to-drain ratio
- Built-in booster pump increases production rate
- Durable stainless steel frame and metal bracket
- Heavier build at 52 pounds compared to lighter models
- Larger footprint with a 28-inch height
- Lower daily capacity than the 800 GPD option on this list
- You need high daily water production without a storage tank
- You have a low inlet water pressure that needs boosting
- You want a durable stainless steel frame for protection
- You prefer a compact unit with a smaller footprint
- You need a higher capacity of 800 gallons per day
- You want a system that includes a storage tank
Verdict: iSpring 300 GPD Tankless RO System delivers strong performance for households needing high flow rates without tank storage. It fits best in kitchens where space allows for a taller, heavier unit and where water pressure benefits from a booster pump.
iSpring RCC7D 75 GPD RO/DI
Best for: aquariums, labs, and ice makers
- Installation Type
- Under Sink
- Daily Production Rate
- 75 GPD
- Target Contaminant
- Chlorine, Lead
- Dimensions
- 14.5 × 5.25 × 18.5 inches
- Weight
- 26.5 pounds
This iSpring RCC7D unit combines reverse osmosis with deionization to produce ultra-pure water. It delivers 75 gallons per day and removes up to 98% of lead, chlorine, and fluoride. The system fits under sink cabinets and weighs 26.5 pounds. It is designed for aquariums, labs, and ice makers rather than drinking water. You get a 1-year warranty and lifetime support from the US.
- Removes up to 98% of lead, chlorine, and fluoride
- Deionization stage produces water purer than distilled
- Fits under sink cabinets for streamlined installation
- Lifetime personalized support from Georgia, USA
- 75 GPD daily production is lower than many tankless competitors
- Not recommended for drinking water due to lack of minerals
- Requires incoming water pressure between 45 and 70 psi
- You need ultra-pure water for reef tanks or aquariums
- You require a system for laboratory or medical use
- You want a compact under-sink unit for ice makers
- You need water for direct drinking consumption
- Your incoming water pressure is below 45 psi
- You require a higher daily production rate than 75 gallons
Verdict: The iSpring RCC7D 75 GPD RO/DI System is a specialized tool for creating ultra-pure water for aquariums and labs. It fits buyers who prioritize mineral-free output over drinking water quality.
iSpring RO800G Tankless 800 GPD
Best for: High-demand households needing tankless water
- Installation Type
- Under Sink
- Daily Production Rate
- 800 GPD
- Filtration Stages
- Two-Stage
- Pure to Drain Ratio
- 2.5:1
- Features
- Tankless
- Faucet Finish
- Brushed Nickel
The iSpring RO800G is a tankless under sink reverse osmosis system with an 800 GPD daily production rate. It features a 2.5:1 pure to drain ratio and two-stage filtration using a composite filter and RO membrane. This design saves space and water while removing impurities down to 0.0001 microns. You get fast flow rates and easy installation with quick-connect fittings. It suits high-demand households or light commercial use.
- 800 GPD daily production rate for high output
- 2.5:1 pure to drain ratio saves water
- Two-stage filtration removes sediment, chlorine, and heavy metals
- Tankless design saves under sink space
- Quick-connect fittings allow tool-free installation
- Only two filtration stages compared to five-stage systems on this list
- Not recommended for refrigerator or ice maker connections
- 1-year limited warranty requires registration
- You need high daily water production without a storage tank
- You want to minimize water waste with a 2.5:1 ratio
- You prefer quick-connect installation without shutting off water
- You need a refrigerator or ice maker connection
- You require five or more filtration stages
- You want a longer standard warranty without registration
Verdict: The iSpring RO800G Tankless RO Filter delivers high output in a compact design. You should choose it if you need fast water flow for a busy kitchen without using a storage tank.
iSpring RCC7P 75 GPD RO System
Best for: steady flow and efficiency
- Installation Type
- Under Sink
- Daily Production Rate
- 75 GPD
- Filtration Stages
- 5-Stage
- Features
- Booster Pump
- Dimensions
- 14.5 × 5.25 × 19 inches
- Weight
- 20 pounds
The iSpring RCC7P is a 5-stage under-sink reverse osmosis system with a 75 GPD daily production rate. It includes an electric booster pump to maintain consistent performance despite pressure variations. The unit features a brushed nickel faucet and clear first-stage housing for easy inspection. This setup suits households needing reliable, purified drinking water with reduced waste compared to pump-less models.
- Includes an electric booster pump for consistent performance
- Reduces up to 99% of over 1,000 contaminants
- Clear first-stage housing allows easy filter inspection
- Delivers higher throughput with less waste water
- 75 GPD production rate is lower than 800 GPD models
- Requires electrical connection for the booster pump
- Heavier build at 20 pounds compared to lighter units
- You need consistent water pressure for better RO performance
- You want to reduce wastewater compared to standard models
- You prefer easy visual inspection of the first filter stage
- You require a higher daily production rate than 75 GPD
- You cannot run an electrical cord under your sink
- You prefer a tankless system design
Verdict: iSpring RCC7P Under Sink RO System provides steady purified water via its booster pump. It fits homes prioritizing consistent flow and efficiency over high-volume tankless output.
iSpring RCD100 Countertop RO System
Best for: renters needing hot filtered water
- Installation Type
- countertop
- Daily Production Rate
- 100 GPD
- Filtration Stages
- 5-stage
- Pure to Drain Ratio
- 2.5:1
- Features
- UV Filter
- Form Factor
- Portable
The iSpring RCD100 is a countertop reverse osmosis system that requires no plumbing. It produces 100 gallons per day with a 2.5:1 pure to drain ratio. The unit includes instant hot water dispensing at four temperature settings and a built-in UV light for added protection. Its compact footprint fits easily on any counter. This system suits users who want clean water without installation or who need hot water access directly from the filter.
- 100 GPD daily production capacity
- 2.5:1 pure to drain water ratio
- Built-in UV light for contaminant reduction
- Four instant hot water temperature modes
- No plumbing installation required
- 100 GPD capacity is lower than many under-sink models on this list
- 16.2-pound weight requires sturdy counter support
- Limited to city water input, not well water
- You cannot modify kitchen plumbing
- You need instant hot water for beverages
- You want a portable water filtration solution
- You require high-volume water for cooking
- You use well water as your source
- You prefer under-sink storage for filters
Verdict: The iSpring RCD100 Countertop RO System fits renters or offices needing clean, hot water without drilling holes. It delivers steady filtration for small households but cannot match the volume of larger under-sink tanks.
iSpring RCC7AK-UVF3 7-Stage Under Sink
Best for: 7-stage filtration with UV and alkaline stages
- Installation Type
- Under Sink
- Filtration Stages
- 7-Stage
- Certifications
- NSF/ANSI 58
- Remineralization
- Alkaline
- Features
- Alkaline, UV Filter
- Dimensions
- 17 × 6 × 18 inches
This iSpring system combines reverse osmosis with alkaline remineralization and ultraviolet purification. It features seven filtration stages and holds NSF/ANSI 58 certification. The unit includes extra pre-filters for extended use. You get a transparent housing to monitor buildup and a patented top-mounted faucet design for easier installation. It reduces over 1,000 contaminants, including lead and PFAS, while adding essential minerals.
- Seven filtration stages including UV protection
- NSF/ANSI 58 certified
- Includes three extra pre-filters
- Transparent first-stage housing
- Patented top-mounted faucet design
- Heavier build at 29 pounds
- Larger footprint with 17-inch length
- Lower daily capacity than tankless models
- You want alkaline remineralization and UV protection
- You prefer a transparent housing to monitor filter status
- You need NSF/ANSI 58 certification
- You need a tankless system for limited under-sink space
- You want a higher gallon-per-day output
- You prefer a compact countertop unit
Verdict: iSpring RCC7AK-UVF3 7-Stage Alkaline UV System suits households that prioritize comprehensive contaminant reduction and mineral balance. It fits users who value transparent monitoring and certified safety over maximum flow speed.
iSpring RCC1UP 100 GPD Under Sink RO
Best for: UV purification and quiet under-sink installation
- Installation Type
- Under Sink
- Daily Production Rate
- 100 GPD
- Filtration Stages
- 6-Stage
- UV Purification
- 11W Ultraviolet UV Filter
- Features
- UV Filter, Booster Pump
- Use
- Drinking Water
This under-sink system combines reverse osmosis with ultraviolet purification. It features a 100 GPD daily production rate and a 6-stage filtration process. The included booster pump ensures near-silent operation. You get reduced contaminants like lead and PFAS. The compact 8 by 15 by 18 inch design fits under standard sinks. It requires an electrical outlet for the UV filter to function.
- Reduces over 1,000 contaminants including PFAS and lead
- 11W ultraviolet filter for additional purification
- 100 GPD daily production rate
- Booster pump for near-silent operation
- 100 GPD output is lower than 300 to 800 GPD models on this list
- 35 pound weight is heavier than most tankless or compact systems
- Requires an electrical outlet for the UV filter
- You want added UV protection alongside reverse osmosis
- You need a quiet system with a booster pump
- You have space under a standard kitchen sink
- You require a tankless design for maximum counter space
- You need a production rate above 100 GPD
- You do not have an electrical outlet under your sink
Verdict: iSpring RCC1UP 6-Stage 100 GPD Under Sink RO suits households prioritizing UV purification and quiet operation over high-volume output.
02 Specifications side by side
| Spec | iSpring RCC7-BN 75 GPD Under Sink RO | iSpring T20M 20 Gallon RO Storage Tank | iSpring RO500AK-ORB 500 GPD Alkaline RO | iSpring PH100 100 GPD Alkaline RO | iSpring RCC7P-AK Alkaline RO | iSpring UVF20 Whole House UV System | iSpring US31KF-BV Bacteria Removal Filter | iSpring RCB3P 300 GPD Tankless RO | iSpring RCC7D 75 GPD RO/DI | iSpring RO800G Tankless 800 GPD | iSpring RCC7P 75 GPD RO System | iSpring RCD100 Countertop RO System | iSpring RCC7AK-UVF3 7-Stage Under Sink | iSpring RCC1UP 100 GPD Under Sink RO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Installation Type | Under Sink | – | Under Sink | Under-sink | Under Sink | Whole House | Under-Sink | Under Sink | Under Sink | Under Sink | Under Sink | countertop | Under Sink | Under Sink |
| Daily Production Rate | 75 GPD | – | 500 GPD | 100 GPD | – | – | – | 300 GPD | 75 GPD | 800 GPD | 75 GPD | 100 GPD | – | 100 GPD |
| Filtration Stages | 5-Stage | – | – | 6-stage | 6-Stage | – | 3-Stage | – | – | Two-Stage | 5-Stage | 5-stage | 7-Stage | 6-Stage |
| Pure to Drain Ratio | – | – | 2:1 | 1:1 | – | – | – | 1.5:1 | – | 2.5:1 | – | 2.5:1 | – | – |
| Certifications | NSF/ANSI 58 | NSF and ANSI Standards | – | – | – | – | NSF/ANSI Compliant | – | – | – | – | – | NSF/ANSI 58 | – |
| Remineralization | – | – | Alkaline remineralization | Alkaline remineralization | Alkaline Remineralization | – | – | – | – | – | – | – | Alkaline | – |
| UV Purification | – | – | – | – | – | LED UV | – | – | – | – | – | – | – | 11W Ultraviolet UV Filter |
| Capacity | 75 GPD | – | 500 GPD | 100 GPD | – | – | – | – | 75 GPD | 800 GPD | 75 GPD | 100 GPD | – | 100 GPD |
| Features | – | – | Tankless, Alkaline | Alkaline, Remineralization | Alkaline | UV Filter | – | Tankless, Booster Pump | – | Tankless | Booster Pump | UV Filter | Alkaline, UV Filter | UV Filter, Booster Pump |
| Faucet Finish | Brushed Nickel | – | – | – | Brushed Nickel | – | – | – | – | Brushed Nickel | – | – | – | – |
| Use | Drinking Water | – | – | Drinking Water | Drinking Water | – | – | – | – | – | – | – | – | Drinking Water |
| Target Contaminant | – | – | – | – | – | – | Rust | – | Chlorine, Lead | – | – | – | – | – |
| Port Size | – | – | – | – | – | 3/4-Inch | – | – | – | – | – | – | – | – |
| Application | – | – | – | – | – | – | Kitchen | – | – | – | – | – | – | – |
| Form Factor | – | – | – | – | – | – | – | – | – | – | – | Portable | – | – |
| Dimensions | 15 × 8 × 18 inches | 16 × 16 × 30 inches | 17.5 × 5.2 × 16.3 inches | 17.5 × 16 × 19 inches | 14.5 × 5.25 × 19 inches | 3.3 × 5.5 × 14.2 inches | 13 × 14.5 × 6 inches | 19.5 × 11 × 28 inches | 14.5 × 5.25 × 18.5 inches | 6.5 × 17.8 × 17.8 inches | 14.5 × 5.25 × 19 inches | 15.5 × 7 × 15.5 inches | 17 × 6 × 18 inches | 15 × 8 × 18 inches |
| Weight | 27.5 pounds | 32 pounds | 28 pounds | – | 20 pounds | 3.4 pounds | 12.2 pounds | 52 pounds | 26.5 pounds | – | 20 pounds | 16.2 pounds | 29 pounds | 35 pounds |
| Size | Regular | 20 Gallons | NSF 500 GPD Alkaline RO | – | – | – | – | 300 GPD RO Tankless | 75 GPD with Faucet | 800 GPD | – | 15.5"H x 15.5''L x 7" W | Standard | – |
| Color | Brushed Nickel Faucet | White – 20 Gallons | White + Oil Rubbed Black Faucet | White | Brushed Nickel Faucet | – | – | Blue | White | Gray RO | Brushed Nickel Faucet | White | White | White |
| Model | RCC7-BN | T20M | RO500AK-ORB | PH100 | RCC7P-AK | UVF20 | US31KF-BV | RCB3P | RCC7D | RO800G | RCC7P | RCD100 | RCC7AK-UVF3 | RCC1UP |
03 Who iSpring RO Systems Suit
iSpring covers standard under-sink needs with compact 5-stage units like the RCC7-BN. You can choose tankless models for high flow, such as the 800 GPD RO800G, or alkaline systems for taste. The range includes a countertop option for renters and a whole-house UV filter for microbial protection. Most units are white or brushed nickel. You will not find smart app connectivity or remote controls in this lineup. Sizes vary from small countertop boxes to heavy under-sink tanks. Choose based on your space and output requirements.
You can compare stage counts and daily output ratings across the best iSpring reverse osmosis systems.
04 How to choose the right one
Check installation space
Measure your under-sink cabinet before buying. The iSpring RCC7-BN 75 GPD Under Sink RO fits most standard spaces with its 18-inch height. Larger units like the iSpring RCB3P 300 GPD Tankless RO require more room, standing 28 inches tall. Countertop models like the iSpring RCD100 need flat surface area instead. Verify width and depth to ensure the unit fits without blocking other items. Proper fit prevents installation delays and ensures safe operation.
Match filtration stages
Review the number of filtration stages to understand contaminant removal. The iSpring RCC7-BN uses a 5-stage process for standard drinking water needs. If you want enhanced mineral balance, the iSpring PH100 100 GPD Alkaline RO adds a 6th stage for remineralization. The iSpring RCC7AK-UVF3 offers 7 stages, including UV filtration for added microbial protection. More stages generally mean broader contaminant reduction. Choose the stage count that aligns with your water quality concerns and taste preferences.
Assess daily capacity
Gallons per day (GPD) indicate how much purified water the system produces. The iSpring RCC7-BN provides 75 GPD, suitable for typical households. For high-demand kitchens, the iSpring RO800G delivers 800 GPD without a storage tank. The iSpring T20M 20 Gallon RO Storage Tank holds water for later use, supporting high-volume needs. Higher GPD values ensure you have enough water for cooking and drinking without long waits. Select a capacity that matches your family size and usage habits.
Evaluate water efficiency
Check the pure-to-drain ratio to understand water waste. The iSpring PH100 100 GPD Alkaline RO offers a 1:1 ratio, meaning it wastes minimal water during filtration. The iSpring RO800G has a 2.5:1 ratio, which is also efficient for tankless operation. Lower ratios reduce utility costs and environmental impact. If water conservation is important, prioritize systems with lower drain ratios. This spec helps you balance purification performance with resource efficiency in your home.
Select faucet finish
Choose a faucet finish that matches your kitchen decor. The iSpring RCC7-BN comes with a brushed nickel faucet, offering a modern look. The iSpring RO500AK-ORB includes an oil rubbed black faucet for a contrasting style. The iSpring RCC7P-AK also features brushed nickel for consistency. The finish does not affect filtration performance but impacts aesthetics. Pick a color that complements your existing fixtures to maintain a cohesive kitchen design without compromising on water quality.
05 Frequently asked questions
Which iSpring RO system is best for standard under-sink drinking water?
The iSpring RCC7-BN 75 GPD Under Sink RO is the top pick for standard households. It features a 5-stage filtration setup and fits under most sinks with dimensions of 18 inches in height. The brushed nickel faucet adds a clean look, and the unit weighs 27.5 pounds for stable installation.
How do I choose a tankless iSpring RO system?
Choose a tankless model if you need high flow rates without storage tanks. The iSpring RO800G Tankless 800 GPD delivers fast output with a 2.5:1 pure-to-drain ratio. Alternatively, the iSpring RCB3P 300 GPD includes a booster pump for steady pressure. Both fit under sinks but require careful space planning.
What iSpring RO systems include alkaline remineralization?
Several models add alkaline stages to improve taste. The iSpring RO500AK-ORB 500 GPD Alkaline RO offers high output without a tank. The iSpring PH100 100 GPD Alkaline RO provides a 1:1 pure-to-drain ratio for efficiency. The iSpring RCC7P-AK Alkaline RO suits low-pressure homes, and the RCC7AK-UVF3 adds UV purification.
Is there an iSpring RO system for renters or countertops?
Yes, the iSpring RCD100 Countertop RO System is designed for renters. It requires no drilling and sits on your counter with a 15.5-inch height. It offers 100 GPD capacity and includes UV filtration. This portable unit is ideal for small households that cannot modify their kitchen plumbing.
Which iSpring system is best for whole-house microbial protection?
The iSpring UVF20 Whole House UV System is the best choice for whole-house protection. It uses UV filtration to target microbes without reducing minerals. The unit has 3/4-inch port sizes for standard plumbing connections. It is compact, weighing only 3.4 pounds, and fits easily into existing water lines.
What is the most water-efficient iSpring RO system?
The iSpring PH100 100 GPD Alkaline RO is the most efficient with a 1:1 pure-to-drain ratio. It wastes half the water compared to traditional systems. This makes it practical for daily drinking water needs. The 6-stage filtration also includes remineralization to improve taste while conserving water.
Do any iSpring RO systems include booster pumps?
Yes, several models include booster pumps for consistent flow. The iSpring RCB3P 300 GPD Tankless RO uses a pump for high pressure. The iSpring RCC7P 75 GPD and RCC1UP 100 GPD also feature booster pumps. These units ensure steady purified water even if your home has low incoming pressure.
