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Finding the best APEC Water reverse osmosis systems depends on your specific kitchen layout and water needs. This guide compares 15 models based strictly on their published specifications. APEC Water offers under-sink units, portable countertop filters, and tankless systems in various sizes and finishes like chrome or brushed nickel.
The top pick is the APEC ROES-50 5-Stage Under Sink RO. It leads because it provides certified under-sink filtration with an included tank, making it a solid choice for families prioritizing verified contaminant reduction.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | APEC ROES-50 5-Stage Under Sink RO Best overall | certified under-sink filtration with included tank | |
| 2 | APEC Water 20 Gallon RO Storage Tank Best budget | users needing high volume water storage | |
| 3 | APEC Water RO-90 Chrome 90 GPD Also great | standard under sink households | |
| 4 | APEC Water 50 GPD Under Sink RO Best home | Homeowners wanting certified, complete under sink filtration | |
| 5 | APEC ROES-50X 5-Stage RO System Also great | homes prioritizing certified safety over speed | |
| 6 | APEC ROTL-A1000 1000 GPD Tankless RO Best premium | High-volume under-sink filtration | |
| 7 | APEC Water ROCT-C1 Countertop Chiller Also great | countertop users wanting chilled RO water | |
| 8 | APEC RO-90 90 GPD Chrome RO System Best chrome | homes needing 90 GPD certified filtration | |
| 9 | APEC Water RO-CTOP-C Countertop RO Also great | renters and portable water needs | |
| 10 | APEC ROCT-C1 Countertop Chiller Also great | countertop use with cold water needs | |
| 11 | APEC ROTL-AIO-A Tankless RO System Also great | compact kitchens needing high daily output | |
| 12 | APEC Water RO-CTOP-PH Portable Countertop RO Best alkaline | renters needing alkaline water | |
| 13 | APEC Water RO-Hi Stainless Steel RO Also great | Fast-flow, certified under-sink purification | |
| 14 | APEC ROTL-AIO Tankless RO Also great | tight under-sink spaces | |
| 15 | APEC ROCT-Plus Countertop RO System Best child safety lock | Renters needing hot water and UV safety |
01 APEC Water RO Systems Compared
APEC Water’s lineup splits into under-sink, countertop, and tankless categories. You choose based on installation space and flow needs. The ROES-50 and RO-90 offer standard under-sink filtration with storage tanks. These units fit traditional kitchens where space allows for a dedicated cabinet setup. The ROTL-A1000 and ROTL-AIO-A provide tankless options for those prioritizing speed and compact design without sacrificing capacity. Countertop models like the ROCT-C1 and RO-CTOP-C suit renters or portable use, requiring no permanent plumbing. Filtration stages range from three to six, with features like UV filters or alkaline enhancement available. Pure to drain ratios vary, affecting water efficiency. You select the group that matches your home’s layout and water quality goals.
APEC ROES-50 5-Stage Under Sink RO
Best for: certified under-sink filtration with included tank
- Installation Type
- Under Sink
- Daily Production Rate
- 50 GPD
- Filtration Stages
- 5-Stage
- Certifications
- NSF/ANSI 372 & 58
- Faucet Finish
- Brushed Nickel
- Use
- Drinking Water
The APEC ROES-50 is a 5-stage under sink reverse osmosis system producing 50 gallons per day. It holds NSF 372 and 58 certifications, ensuring safe materials and impurity reduction. The unit includes a water tank, faucet, and installation kit. Its 24.9-pound weight and compact dimensions fit standard under-sink cabinets. This model suits households seeking certified, reliable filtration with straightforward maintenance.
- NSF 372 and 58 certifications for material safety and contaminant reduction
- 50 gallons per day production rate for daily household use
- 5-stage filtration removes arsenic, lead, and fluoride
- Includes water tank, faucet, and quick connection fittings
- 50 GPD output is lower than the 90 GPD and 1000 GPD models on this list
- 24.9-pound weight and included tank require more under-sink space than tankless alternatives
- You need NSF-certified filtration for arsenic and lead removal
- You prefer a complete system with a tank and faucet included
- You have standard under-sink cabinet space for a 50 GPD unit
- You require a tankless design for maximum counter or cabinet space
- You need a production rate higher than 50 gallons per day
- You want a countertop unit that does not require under-sink installation
Verdict: APEC ROES-50 50 GPD Under Sink RO is a solid choice for families prioritizing certified contaminant reduction over high flow rates. It fits buyers who want a complete, tank-based system for standard kitchen cabinets.
APEC Water 20 Gallon RO Storage Tank
Best for: users needing high volume water storage
- Dimensions
- 16 × 16 × 32 inches
This is a 20-gallon pre-pressurized water storage tank designed for reverse osmosis systems. It holds up to 14.8 gallons of usable water. The unit measures 32 inches high and 16 inches wide. It features a food grade bladder and 3/4 inch male pipe thread connections. You need this if your RO system requires larger storage capacity than standard tanks provide.
- Holds up to 14.8 gallons of water
- Pre-pressurized design for efficient discharge
- Food grade bladder for safety
- 3/4 inch male pipe thread connection
- Large 32-inch height requires significant vertical space
- 16-inch width and length need ample floor area
- Only stores 14.8 gallons despite 20-gallon rating
- You need extra storage capacity for high usage
- You have space for a 32-inch tall tank
- You are upgrading an existing RO system
- You have limited under-sink or cabinet space
- You prefer a compact or tankless design
- You do not need more than 4 gallons of storage
Verdict: APEC TANK-20 20 Gallon Storage Tank is a large capacity solution for users who need to store more water than standard tanks allow. It fits buyers with ample space who prioritize volume over compactness.
APEC Water RO-90 Chrome 90 GPD
Best for: standard under sink households
- Installation Type
- Under Sink
- Daily Production Rate
- 90 GPD
- Filtration Stages
- 5-Stage
- Certifications
- NSF Certified 372 & 58, WQA Gold Seal
- Dimensions
- 16 × 5.25 × 17.5 inches
- Weight
- 25 pounds
The APEC RO-90 is a 5-stage under sink reverse osmosis system producing 90 gallons per day. It features NSF 372 and 58 certifications alongside a WQA Gold Seal. The unit measures 16 by 5.25 by 17.5 inches and weighs 25 pounds. It includes a lead-free faucet and quick connect fittings. This system suits households needing reliable, certified filtration with moderate daily output.
- Produces 90 gallons of filtered water daily
- NSF 372 and 58 certified for safety
- WQA Gold Seal for contaminant reduction
- 5-stage filtration removes 99% of impurities
- Includes lead-free designer faucet and tubing
- 90 GPD output is lower than 1000 GPD tankless models
- 25 pound weight is heavier than countertop units
- Requires under sink installation space
- You need certified removal of lead and arsenic
- You have space under your kitchen sink
- You want a durable 5-stage system
- You require more than 90 gallons per day
- You prefer a countertop or tankless design
- You need a system with a built-in storage tank
Verdict: APEC RO-90 Under Sink 90 GPD offers certified safety and steady output for families with standard under sink storage. It fits buyers prioritizing verified contaminant reduction over high-volume tankless speed.
APEC Water 50 GPD Under Sink RO
Best for: Homeowners wanting certified, complete under sink filtration
- Installation Type
- Under sink
- Daily Production Rate
- 50 GPD
- Filtration Stages
- 5-Stage
- Certifications
- WQA Certified
- Intended Use
- Home
- Dimensions
- 15.5 × 5.25 × 17 inches
This APEC Water system is a 5-stage under sink reverse osmosis filter rated for 50 gallons per day. It carries WQA certification and includes an extra pre-filter set alongside the standard components. The unit measures 15.5 inches long and 17 inches high. It is designed for home use and reduces over 1,000 impurities. You get a complete installation kit with quick connections. This setup suits households needing reliable, certified filtration under the sink.
- WQA Certified for safety and performance
- Includes extra pre-filter set for extended life
- Quick connection fittings for easy DIY installation
- 50 GPD daily production rate
- 50 GPD output is lower than 90 or 1000 GPD models on the list
- Requires a storage tank, taking up more under sink space than tankless options
- Standard 5-stage filtration lacks alkaline or UV stages found in other variants
- You want a WQA certified system for peace of mind
- You need a complete kit with extra filters for longer maintenance intervals
- You have under sink space for a standard tank-based unit
- You need high flow rates above 50 GPD
- You prefer tankless designs to save cabinet space
- You want built-in alkaline remineralization or UV purification
Verdict: APEC Water 50 GPD Under Sink RO is a solid choice for homeowners who prioritize certified safety and included maintenance extras over high flow speed or advanced stage filtration.
APEC ROES-50X 5-Stage RO System
Best for: homes prioritizing certified safety over speed
- Filtration Stages
- 5-Stage
- Certifications
- WQA Gold Seal
- Use
- Drinking Water
- Dimensions
- 15.5 × 5.25 × 17 inches
- Weight
- 25 pounds
The APEC Water ROES-50 Essence Series is a 5-stage under-sink reverse osmosis system. It holds WQA Gold Seal certification, verifying its contaminant rejection and structural integrity. The unit measures 17.5 inches high and 15.5 inches long. You get a compact footprint for under-sink installation. This model suits households prioritizing certified safety and straightforward maintenance schedules for drinking water.
- WQA Gold Seal certification for safety and performance
- 5-stage filtration process for thorough purification
- Compact dimensions of 17.5 inches high and 15.5 inches long
- Prefilters last 6 to 12 months depending on water quality
- Lower output capacity of 50 GPD compared to 90 GPD or 1000 GPD models on this list
- Heavier build at 25 pounds versus lighter tankless alternatives
- Requires a storage tank, adding bulk compared to tankless designs
- You want WQA Gold Seal certification for verified safety standards
- You have limited under-sink space and need a compact unit
- You prefer a proven 5-stage membrane filtration system
- You need high flow rates exceeding 50 gallons per day
- You want a tankless system to save cabinet space
- You prioritize alkaline mineral addition or UV filtration
Verdict: APEC Water ROES-50 Essence Series delivers certified protection in a standard footprint. It fits homes that value verified filtration standards over high-speed output or tankless convenience.
APEC ROTL-A1000 1000 GPD Tankless RO
Best for: High-volume under-sink filtration
- Installation Type
- Under-sink
- Daily Production Rate
- 1000 GPD
- Filtration Stages
- 3-stage
- Pure to Drain Ratio
- 2:1
- Certifications
- NSF 372, NSF 58, IAPMO
- Features
- Tankless
The APEC ROTL-A1000 is a tankless reverse osmosis system designed for high-volume water needs. It produces 1000 gallons per day, filling a cup in under six seconds. The unit holds NSF 58 and 372 certifications, ensuring it removes 99.9% of impurities like lead and PFAS. Its compact 18 by 10 by 10 inch footprint fits under most sinks. You get a 2:1 pure to drain ratio, which reduces water waste during filtration.
- 1000 GPD daily production rate
- NSF 58 and 372 certifications
- 2:1 pure to drain efficiency ratio
- Tankless design saves space
- 3-stage filtration removes fewer contaminants than 5-stage models
- 18.9 pounds weight is heavy for under-sink installation
- 1000 GPD output exceeds typical household faucet flow limits
- You need high-volume water for large families
- You want certified removal of lead and PFAS
- You have space for a 18 by 10 by 10 inch unit
- You prefer a countertop unit for portability
- You want a 5-stage filtration system
- You need a system with a built-in storage tank
Verdict: APEC ROTL-A1000 1000 GPD Tankless RO suits households requiring rapid water access and certified purity. Its high output and efficient water ratio make it ideal for busy kitchens, provided you can accommodate its size and weight.
APEC Water ROCT-C1 Countertop Chiller
Best for: countertop users wanting chilled RO water
- Installation Type
- Countertop
- Filtration Stages
- 6-stage
- Pure to Drain Ratio
- 3:1
- Certifications
- NSF 372, NSF 58
- UV Purification
- UV filtration
- Features
- UV Filter
The APEC ROCT-C1 is a countertop reverse osmosis system that chills water to 40°F. It uses a 6-stage filtration process, including UV purification, to treat water. The unit features a 3:1 pure to drain ratio for efficiency. You do not need plumbing for installation. This model suits those wanting cold, filtered water on their counter without complex setup.
- Chills water to 40°F with a built-in compressor
- 6-stage filtration including UV purification
- 3:1 pure to drain ratio
- Countertop installation with no plumbing required
- TDS monitoring on the touch panel
- Smaller 27oz cold water reservoir compared to tank-based systems
- Countertop footprint requires significant counter space
- Lower flow rate than high-capacity under-sink models
- You want cold water without installing a new tap
- You need UV purification for added safety
- You have limited counter space but no under-sink access
- You need high-volume water for cooking
- You prefer a compact system that fits under a sink
- You want a larger cold water reservoir
Verdict: APEC ROCT-C1 Countertop RO Chiller delivers chilled, purified water for renters or those without under-sink plumbing. It fits users who prioritize convenience and cold water over high volume.
APEC RO-90 90 GPD Chrome RO System
Best for: homes needing 90 GPD certified filtration
- Daily Production Rate
- 90 GPD
- Certifications
- WQA
- Faucet Finish
- Chrome
- Use
- Drinking Water
- Dimensions
- 16 × 5.25 × 17.5 inches
The APEC RO-90 is a 5-stage under sink reverse osmosis system with a 90 gallons per day output. It holds WQA certification to remove impurities like lead and arsenic. The unit includes a chrome faucet and uses large capacity filters. This model suits households needing steady water flow without a storage tank. The chrome finish matches standard kitchen fixtures.
- 90 GPD daily production rate
- WQA certification for impurity removal
- Chrome faucet finish included
- Large super capacity filters
- 90 GPD output is lower than the 1000 GPD model on this list
- Requires a 20 gallon storage tank for full capacity
- Maximum feed water pressure limited to 85 psi
- You want a certified system with a chrome faucet
- You need 90 GPD output for daily use
- You prefer under sink installation with large filters
- You need tankless operation with high flow
- You require more than 90 GPD output
- You want a countertop or portable unit
Verdict: The APEC RO-90 Chrome 90 GPD RO System delivers certified filtration with a 90 GPD rate. It fits homes that prioritize steady flow and a chrome faucet over tankless speed.
APEC Water RO-CTOP-C Countertop RO
Best for: renters and portable water needs
- Installation Type
- Countertop
- Form Factor
- Portable
- Dimensions
- 15.5 × 6.5 × 6.5 inches
- Weight
- 10 pounds
The APEC RO-CTOP-C is a portable, installation-free countertop reverse osmosis system. It weighs 10 pounds and measures 15.5 by 6.5 by 6.5 inches. You connect it to most standard faucets in minutes. This lightweight unit suits apartments, motor homes, and students. It requires no permanent plumbing. You get clean water without complex setup or tools.
- Installation-free countertop design
- Lightweight 10-pound build
- Connects to standard faucets
- Portable form factor
- Limited to standard faucet compatibility
- Smaller footprint than under-sink models
- Countertop placement uses counter space
- You rent an apartment or live in a condo
- You need a portable system for travel or motor homes
- You want to avoid permanent plumbing installation
- You have a pull-out or sprayer faucet
- You need high daily gallon capacity
- You want an under-sink hidden installation
Verdict: APEC RO-CTOP-C Countertop RO Filter fits renters and travelers who need clean water without permanent installation. It offers a simple plug-and-drink solution for standard faucets.
APEC ROCT-C1 Countertop Chiller
Best for: countertop use with cold water needs
- Installation Type
- Countertop
- Filtration Stages
- 4-stage
- Pure to Drain Ratio
- 3:1
- Certifications
- NSF 372 & 58
- UV Purification
- UV filter
- Dimensions
- 15.7 × 8.3 × 18.1 inches
This APEC Water countertop reverse osmosis system chills purified water to 40°F. It uses a 4-stage filtration process with UV purification and a 3:1 pure to drain ratio. The unit includes a 27oz cold water reservoir and a removable pitcher. It requires no plumbing, making it suitable for renters or those without under-sink access. Certified by NSF 372 and 58, it offers a convenient, self-contained solution for cold drinking water.
- Chills water to 40°F with a built-in compressor
- 4-stage filtration with UV purification
- 3:1 pure to drain ratio for efficiency
- No plumbing installation required
- NSF 372 and 58 certified
- Limited to a 27oz cold water reservoir capacity
- Heavier build at 21.9 pounds compared to standard filters
- Fewer filtration stages than many under-sink RO systems
- You want cold water without installing a new sink
- You need a portable solution for temporary housing
- You prefer UV purification for added safety
- You need high-volume water for cooking or filling large pots
- You have limited counter space for a 15.7-inch footprint
- You want a system with a larger storage tank
Verdict: APEC Water Countertop RO Chiller delivers chilled, purified water without plumbing. It fits you if you value convenience and cold water on demand over high capacity.
APEC ROTL-AIO-A Tankless RO System
Best for: compact kitchens needing high daily output
- Installation Type
- Under the counter
- Pure to Drain Ratio
- 2:1
- Features
- Tankless
- Target Contaminant
- Heavy Metals
- Dimensions
- 11.8 × 5.75 × 17.5 inches
- Weight
- 10 pounds
The APEC ROTL-AIO-A is a tankless under-sink reverse osmosis system designed for compact spaces. It measures 5.75 by 11.8 by 17.5 inches and weighs 10 pounds. This unit produces 600 gallons per day with a 2:1 pure to drain ratio. It uses a four-in-one filter to remove heavy metals and impurities. You get smart alerts and quick changes. It suits those needing high output without a storage tank.
- Generates 600 gallons per day
- Compact 5.75 by 11.8 by 17.5 inch footprint
- Efficient 2:1 pure to drain ratio
- Single four-in-one filter simplifies maintenance
- Requires a power adapter for operation
- Heavier at 10 pounds compared to lighter units
- Lower daily output than the 1000 GPD model
- You need high daily water volume
- You have limited under-sink space
- You want to avoid a storage tank
- You prefer a countertop unit
- You need alkaline mineral filtration
- You want a system without electricity
Verdict: APEC ROTL-AIO-A Tankless RO System delivers high output in a small footprint for kitchens needing tankless efficiency. It fits users who prioritize space savings and fast water production over battery-free operation.
APEC Water RO-CTOP-PH Portable Countertop RO
Best for: renters needing alkaline water
- Installation Type
- Countertop
- Daily Production Rate
- 90 GPD
- Filtration Stages
- 4-Stage
- Remineralization
- Alkaline Mineral
- Form Factor
- Portable
- Dimensions
- 14 × 6 × 6.5 inches
This portable countertop reverse osmosis system raises pH using alkaline minerals. It delivers 90 gallons per day through a 4-stage filtration process. The unit connects to standard faucets in minutes without tools. Weighing 9.55 pounds, it fits easily on counters. It suits renters, students, and travelers who need clean water without permanent installation.
- Alkaline mineral remineralization raises pH levels
- 90 GPD daily production rate
- 4-stage ultra-pure filtration
- Portable design with no installation required
- 4-stage filtration has one fewer stage than the 5-stage models on this list
- 90 GPD output is lower than the 90 GPD and 1000 GPD tankless options available
- 9.55-pound weight is heavier than basic single-stage filters
- You rent an apartment and cannot drill holes
- You want alkaline water without buying separate bottles
- You need a system for travel or RV use
- You have a pull-out or sprayer faucet
- You need more than 90 gallons per day
- You want a permanent under-sink installation
Verdict: APEC RO-CTOP-PH Countertop RO offers alkaline water and 90 GPD output for portable use. It fits renters and travelers who need clean water without permanent installation.
APEC Water RO-Hi Stainless Steel RO
Best for: Fast-flow, certified under-sink purification
- Certifications
- WQA
- Use
- Drinking Water
- Dimensions
- 6 × 16 × 18 inches
The APEC Water RO-Hi is a 5-stage reverse osmosis system designed for single-family under-sink installation. It features a 3/8-inch fast-flow output to reduce wait times for filling glasses or pots. The unit is WQA certified to remove over 1,000 impurities, including fluoride, arsenic, and lead. It measures 16 by 18 by 6 inches and includes a lead-free metal faucet. This system suits households prioritizing durable, USA-assembled components and high flow rates.
- WQA certified to remove 1,000+ impurities
- 3/8-inch fast-flow output design
- USA designed, engineered, and assembled
- Includes lead-free metal luxury faucet
- 16 by 18 by 6 inches footprint
- Standard 5-stage filtration configuration
- You want a WQA certified system
- You prefer a fast-flow output
- You need a USA-assembled unit
- You require a tankless design
- You need a countertop model
- You want UV filtration added
Verdict: APEC Water RO-Hi High Output RO System delivers reliable purification with a fast-flow design for single-family homes. It fits buyers who value certified performance and durable, USA-built components over tankless convenience.
APEC ROTL-AIO Tankless RO
Best for: tight under-sink spaces
- Installation Type
- Under the counter
- Pure to Drain Ratio
- 2:1
- Features
- Tankless
- Target Contaminant
- Heavy Metals
- Dimensions
- 11.8 × 5.75 × 17.5 inches
This APEC tankless system saves under-sink space with a compact footprint measuring 5.75 by 11.8 by 17.5 inches. It produces 600 gallons per day with a 2:1 pure-to-drain ratio. The four-in-one filter reduces over 1,000 impurities, including heavy metals and PFAS. You get quick installation and smart filter alerts. It suits buyers who want high output without a storage tank.
- Produces 600 gallons per day of pure water
- Compact tankless design fits tight under-sink spaces
- Reduces over 1,000 impurities down to 0.0001 microns
- Single four-in-one filter simplifies maintenance
- Lower daily output of 600 GPD compared to 900+ GPD models
- Requires a power adapter for operation
- Higher water waste ratio than some high-efficiency competitors
- You have limited under-sink space for a storage tank
- You need a compact system that fits a small footprint
- You want to reduce heavy metals and PFAS from your water
- You require a higher output than 600 gallons per day
- You prefer a system that does not need electrical power
- You want a model with a more efficient water waste ratio
Verdict: APEC ROTL-AIO-A Tankless RO System delivers strong filtration in a small footprint for kitchens with space constraints. It fits you if you prioritize compact design and specific contaminant removal over maximum flow rates.
APEC ROCT-Plus Countertop RO System
Best for: Renters needing hot water and UV safety
- Installation Type
- Countertop
- Filtration Stages
- 3 stages
- Pure to Drain Ratio
- 3:1
- UV Purification
- UV Light
- Features
- UV Filter, Child Safety Lock, LED Display
- Dimensions
- 7.87 × 15.4 × 15.6 inches
The APEC ROCT-Plus is a countertop reverse osmosis system that adds UV purification to its three-stage filtration. It features an instant heating element that reaches 203°F and includes a child safety lock. The unit offers a 3:1 pure-to-drain ratio and displays filter life on a digital interface. It suits renters or offices needing a plug-and-play solution with heated water options.
- UV light purification for added safety
- Heats water up to 203°F
- 3:1 pure to drain ratio
- Child safety lock included
- Digital display for filter status
- Only three filtration stages compared to five-stage models on this list
- Heavier build at 14 pounds
- Larger footprint with a 15.4-inch width
- You need a countertop system without plumbing
- You want instant hot water for tea
- You require UV filtration for extra safety
- You prefer a five-stage filtration system
- You need a tankless under-sink model
- You want a system that chills water
Verdict: APEC ROCT-Plus Countertop RO System delivers UV purification and instant heating in a plug-and-play design. It fits renters or small offices who need hot water and a child-safe interface without installing plumbing.
02 Specifications side by side
| Spec | APEC ROES-50 5-Stage Under Sink RO | APEC Water 20 Gallon RO Storage Tank | APEC Water RO-90 Chrome 90 GPD | APEC Water 50 GPD Under Sink RO | APEC ROES-50X 5-Stage RO System | APEC ROTL-A1000 1000 GPD Tankless RO | APEC Water ROCT-C1 Countertop Chiller | APEC RO-90 90 GPD Chrome RO System | APEC Water RO-CTOP-C Countertop RO | APEC ROCT-C1 Countertop Chiller | APEC ROTL-AIO-A Tankless RO System | APEC Water RO-CTOP-PH Portable Countertop RO | APEC Water RO-Hi Stainless Steel RO | APEC ROTL-AIO Tankless RO | APEC ROCT-Plus Countertop RO System |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Installation Type | Under Sink | – | Under Sink | Under sink | – | Under-sink | Countertop | – | Countertop | Countertop | Under the counter | Countertop | – | Under the counter | Countertop |
| Daily Production Rate | 50 GPD | – | 90 GPD | 50 GPD | – | 1000 GPD | – | 90 GPD | – | – | – | 90 GPD | – | – | – |
| Filtration Stages | 5-Stage | – | 5-Stage | 5-Stage | 5-Stage | 3-stage | 6-stage | – | – | 4-stage | – | 4-Stage | – | – | 3 stages |
| Pure to Drain Ratio | – | – | – | – | – | 2:1 | 3:1 | – | – | 3:1 | 2:1 | – | – | 2:1 | 3:1 |
| Certifications | NSF/ANSI 372 & 58 | – | NSF Certified 372 & 58, WQA Gold Seal | WQA Certified | WQA Gold Seal | NSF 372, NSF 58, IAPMO | NSF 372, NSF 58 | WQA | – | NSF 372 & 58 | – | – | WQA | – | – |
| Remineralization | – | – | – | – | – | – | – | – | – | – | – | Alkaline Mineral | – | – | – |
| UV Purification | – | – | – | – | – | – | UV filtration | – | – | UV filter | – | – | – | – | UV Light |
| Features | – | – | – | – | – | Tankless | UV Filter | – | – | – | Tankless | Alkaline | – | Tankless | UV Filter, Child Safety Lock, LED Display |
| Faucet Finish | Brushed Nickel | – | – | – | – | – | – | Chrome | – | – | – | – | – | – | – |
| Use | Drinking Water | – | – | – | Drinking Water | – | – | Drinking Water | – | – | – | – | Drinking Water | – | – |
| Target Contaminant | – | – | – | – | – | – | – | – | – | – | Heavy Metals | – | – | Heavy Metals | – |
| Form Factor | – | – | – | – | – | – | – | – | Portable | – | – | Portable | – | – | – |
| Intended Use | – | – | – | Home | – | – | – | – | – | – | – | – | – | – | – |
| Dimensions | 15.5 × 5.25 × 17 inches | 16 × 16 × 32 inches | 16 × 5.25 × 17.5 inches | 15.5 × 5.25 × 17 inches | 15.5 × 5.25 × 17 inches | 18 × 10 × 10 inches | 15.7 × 8.3 × 18.1 inches | 16 × 5.25 × 17.5 inches | 15.5 × 6.5 × 6.5 inches | 15.7 × 8.3 × 18.1 inches | 11.8 × 5.75 × 17.5 inches | 14 × 6 × 6.5 inches | 6 × 16 × 18 inches | 11.8 × 5.75 × 17.5 inches | 7.87 × 15.4 × 15.6 inches |
| Weight | 24.9 pounds | – | 25 pounds | – | 25 pounds | 18.9 pounds | – | – | 10 pounds | 21.9 pounds | 10 pounds | 9.55 pounds | – | – | 14 pounds |
| Size | RO System | 20 Gallons | RO-90 (Chrome) | – | Value Bundle | System | – | RO-90 (Chrome) | – | – | – | – | Single Family | – | – |
| Color | White | White | Chrome | – | White | Brushed Nickel | – | Chrome | White | – | Black | White | Stainless Steel | – | White |
| Model | ROES-50 | TANK-20 | RO-90 | ROES-50X | ROES-50X | ROTL-A1000 | ROCT-C1 | RO-90 | RO-CTOP-C | ROCT-C1 | ROTL-AIO-A | RO-CTOP-PH | RO-Hi | AOI-ROTL-B | ROCT-PLUS |
03 Where APEC Water Fits
APEC Water covers most household needs through distinct form factors. You have compact countertop units like the RO-CTOP-C for renters, and larger under-sink tanks for permanent homes. The range spans small footprints, such as the 5.25-inch wide ROES-50, to bulky 20-gallon storage tanks. Finishes include white, chrome, and brushed nickel. You can choose between standard 5-stage filters or specialized alkaline and UV models. Notably, the list lacks whole-house systems or under-counter tankless units with less than 1000 GPD output, leaving a gap for high-volume, space-saving needs below the premium tier.
You can evaluate flow rates and stages across the best APEC Water reverse osmosis systems ranked strictly by specs.
04 How to choose the right one
Check installation space
Measure your under-sink cabinet before buying. The ROES-50 is 5.25 inches wide and fits most standard kitchens. If you have tight space, the ROTL-AIO-A is only 5.75 inches wide. Countertop models like the RO-CTOP-C are 6.5 inches wide and sit on your counter. Always verify your available width and height to ensure the unit fits without blocking other pipes or items.
Select filtration stages
More stages usually mean more contaminant removal. The ROCT-C1 has six stages and includes a UV filter for extra protection. Most under-sink systems like the ROES-50 use five stages. The ROTL-A1000 uses only three stages but delivers high flow. Choose five or six stages if you want thorough purification. Three stages are sufficient for basic filtration if you prioritize speed over multiple filter layers.
Consider water storage
Tank-based systems need space for a storage tank. The ROES-50 includes a tank for steady water access. If you need more volume, the TANK-20 holds 20 gallons but is large. Tankless options like the ROTL-A1000 produce water on demand. They save cabinet space but require a different plumbing setup. Decide if you prefer stored water or continuous flow based on your kitchen layout.
Check pure to drain ratio
This ratio shows how much clean water you get per drop of waste. The ROTL-A1000 has a 2:1 ratio, which is efficient. The ROCT-C1 has a 3:1 ratio, meaning it wastes less water. Higher ratios are better for saving water. Check this spec if you live in an area with water restrictions or want to reduce utility costs. Lower ratios indicate less efficient filtration performance.
Review faucet finish
Match your faucet to your kitchen decor. The RO-90 comes with a chrome faucet for a classic look. The ROTL-A1000 features a brushed nickel finish for a modern style. The ROCT-Plus has a white body with an LED display. Choose a finish that complements your existing fixtures. This is a simple aesthetic choice that ensures your new system looks good in your kitchen.
Look for special features
Some models offer extra conveniences. The ROCT-Plus includes a child safety lock and instant heating. The RO-CTOP-PH provides alkaline water for those who prefer higher pH levels. The ROTL-AIO-A targets heavy metals specifically. These features add value if you have specific needs. Decide if you need hot water, alkaline adjustment, or targeted contaminant removal before purchasing.
05 Frequently asked questions
Which APEC Water RO system is best for large families needing high volume?
The APEC ROTL-A1000 1000 GPD Tankless RO is designed for high-volume needs. It produces 1000 gallons per day without a storage tank. This model suits busy households that require rapid water access. Its efficient 2:1 pure to drain ratio helps manage water usage while maintaining steady output for daily cooking and drinking tasks.
What is the best APEC reverse osmosis system for renters?
The APEC RO-CTOP-C Countertop RO is ideal for renters. It requires no permanent plumbing installation. The unit is portable and weighs only 10 pounds. You can place it on a counter and connect it to a standard faucet. This makes it easy to move or take with you if you relocate.
Does APEC Water offer a tankless reverse osmosis system?
Yes, APEC Water offers the ROTL-A1000 and ROTL-AIO-A models. The ROTL-A1000 is a tankless system with a 1000 GPD output. The ROTL-AIO-A is a compact tankless unit measuring 5.75 inches wide. Both models save under-sink space by eliminating the need for a large storage tank.
Which APEC RO system includes a child safety lock?
The APEC ROCT-Plus Countertop RO System includes a child safety lock. This feature is useful for households with young children. The unit also features an LED display and UV purification. It provides hot and cold water options without requiring under-sink plumbing, making it safe and convenient for kitchen counters.
What is the difference between the APEC ROES-50 and RO-90?
The main difference is the output rate. The ROES-50 produces 50 gallons per day, while the RO-90 produces 90 gallons per day. Both are 5-stage under-sink systems with similar dimensions. The RO-90 also comes in a chrome finish option. Choose the RO-90 if you need faster water replenishment for your storage tank.
Can I get alkaline water from an APEC countertop system?
Yes, the APEC RO-CTOP-PH Countertop RO offers alkaline water. This model is designed for portable use and does not require permanent installation. It provides 90 GPD output with an alkaline feature. This system is suitable for renters or travelers who want to adjust the pH level of their drinking water easily.
Which APEC RO system is best for tight under-sink spaces?
The APEC ROTL-AIO-A Tankless RO System is best for tight spaces. It measures only 5.75 inches wide and 11.8 inches long. This compact footprint allows it to fit in smaller under-sink cabinets. It targets heavy metals and offers a 2:1 pure to drain ratio for efficient water use in constrained areas.
Does the APEC ROCT-C1 chiller require plumbing installation?
No, the APEC ROCT-C1 Countertop RO Chiller does not require plumbing. It is a countertop unit that you can place anywhere with an electrical outlet. It provides chilled, purified water through a 6-stage filtration process. This makes it a convenient option for users who want cold water without under-sink modifications.
