
APEC CS-2500P
Score: 75/100
Icepure Under Sink Filter
Score: 85/100Rankings

The ICEPURE Under Sink Water Filter System is a single-stage, direct-connect unit certified to remove heavy metals and chlorine with a high flow rate exceeding 2.5 GPM. Its primary limitation is the lack of TDS reduction and multi-stage filtration depth compared to RO systems. It is ideal for DIY users with municipal water seeking quick installation and long filter life in tight under-sink spaces.

The APEC CS-2500P is a compact, non-reverse osmosis under-sink water filtration system designed for high-flow performance and long-lasting contaminant reduction. It utilizes US-made granular activated carbon filters to remove up to 97% of chlorine and 90% of lead, offering a simple installation process without the complexity or wastewater of RO systems. It is ideal for kitchens needing 1.67 GPM for quick filling and renters requiring easy installation.
| Attribute | ![]() | ![]() |
|---|---|---|
5,000 gallons | 22,000 gallonsbest | |
1.67 gpm | 2.5 gpmbest | |
1best | 1best | |
— | 0 percentbest | |
20 psi | 60 psibest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Safety & Compliance(1) | ||
Certifications | WQA | NSF/ANSI 42, 372, CAN372 |
Installation & Compatibility(2) | ||
Installation Type | Under-sink Quick-Twist | Under Sink |
Faucet Compatibility | City Tap | 1/2" or 3/8" Female NPT |
Filtration Performance(5) | ||
Filtration Technology | Granular Activated Carbon | Carbon Block |
Flow Rate (gpm) | 1.67 gpm | 2.5 gpm |
Contaminants Removed | Chlorine, Lead, Scale | Heavy Metals, Chlorine, Taste, Odor, Sediments, Scale, PFOA/PFOS, Pesticides, VOCs, Pharmaceuticals, Cysts, Microplastics |
TDS Reduction (percent) | percent | 0 percent |
Operating Pressure (psi) | 20-90 psi | 60 psi |
Capacity & Maintenance(2) | ||
Filter Life (gallons) | 5000 gallons | 22000 gallons |
Annual Operating Cost (usd) | usd | Low usd |

Products in the top-left offer the best value (high score, low price).

Professional reviewers and editors praise APEC under-sink systems for their exceptional value, build quality, and performance relative to price. While specific lab tests highlight the superiority of APEC's reverse osmosis models, the non-RO CS-2500P is recognized for its high flow rates and effective contaminant removal. Editors note that APEC's WQA Gold Seal certification in premium models ensures high standards, and the brand generally scores higher in filtration metrics than competitors like iSpring.
Everyday users frequently praise the APEC CS-2500P for its ease of installation and the noticeable improvement in water taste. Common themes include satisfaction with the high flow rate for daily use and the simplicity of the DIY setup. However, recurring complaints involve variability in filter lifespan, particularly in hard water conditions, and occasional installation-related leaks.

“a few minutes”

“great tasting water”




Professional reviewers and editors highlight the ICEPURE system as a high-capacity, budget-friendly alternative to shorter-life filters. Emphasis is placed on its authoritative NSF certifications, three times longer lifespan, and premium 0.5-micron filtration capabilities. It is positioned as an eco-friendly and easy-to-install solution for basic contaminant reduction, though it lacks the depth of multi-stage systems.
Everyday users generally praise the product for its improved water taste, long filter life, and simple installation process. Common themes include satisfaction with the quick setup time and the convenience of not needing a plumber. There are no recurring complaints documented in the available data, though potential fitment issues for non-standard faucets are noted indirectly.