Nuonuo is hugging a filter cartridge and smiling.

Central Water Purifier – Multi-stage Filtration, Removing Impurities and Residual Chlorine from Water

A central water purifier is a device used for whole-house water purification, typically installed downstream of the pre-filter, aiming to provide more thorough purification of the entire water supply entering the home. It further absorbs and filters harmful substances such as residual chlorine, heavy metals, bacteria, organic matter, and chemicals in the water through materials such as activated carbon and KDF filter media, significantly enhancing the cleanliness and safety of the water. Additionally, it protects downstream equipment (such as water softeners, RO systems, etc.) from potential damage caused by poor water quality.

Central water purifiers are commonly installed on balconies, in kitchens, or equipment rooms for easy drainage and maintenance.

Two central water purifiers of different sizes
Structure
A blue and white central water purifier
Pressure-Resistant Housing

Made of food-grade material, it is explosion-proof and pressure-resistant, simple and elegant.

Intelligent filter valve at the back of the central water purifier
Intelligent Filter Valve

Equipped with an intelligent control system, it significantly improves water output efficiency.

Intelligent control panel at the top of the central water purifierr
Intelligent Control Panel

It allows users to set time and quantity easily, convenient operation, safe and reliable.

A filter cartridge of central water purifier
Food-grade Filter Cartridge

It contains KDF and activated carbon filter material for highly efficient filtration.

A pile of golden KDF filter material
KDF Filter Material

It is a high-purity copper-zinc alloy that can remove over 95% of residual chlorine, hydrogen sulfide, and water-soluble heavy metals through redox reactions, and inhibit bacterial growth.

A pile of black coconut shell activated carbon filter material
Coconut Shell Activated Carbon

It has a rich microporous structure and a large specific surface area, providing strong adsorption capabilities for organic matter, odors, heavy metals, etc.

Features
  • Food-grade plastic housing. Wear-resistant, corrosion-resistant, and long-lasting.
  • ≥ 1000 high iodine value coconut shell activated carbon. It filters impurities, residual chlorine, odors, etc.
  • KDF filter material.It purifies water through oxidation reaction and inhibits bacterial growth.
  • Intelligent filter valve. It offers high-flow intelligent filtration, with button settings for wash time, enabling timed automatic wash operations.
  • Quick replacement of filter cartridge. The product has a simple, compact structure, making the replacement of filter cartridges quick and convenient.
Principle

Filtration State

The water flows into the activated carbon layer, where it adsorbs and filters out tiny organic matter, residual chlorine, heavy metals, etc., and decolorizes and deodorizes the water to improve its taste. Then the water enters the central flow channel, passing through the KDF filter material to further remove impurities, residual chlorine, heavy metals, hydrogen sulfide, etc., and inhibit bacterial growth.

The working principle of internal filtration process of the central water purifier filter cartridge

Backwash State

In the backwash state, the water flow direction is opposite to that during normal filtration. Water enters from the central flow channel, causing the KDF and activated carbon to float. The water flow washes away impurities, silt, and other particles attached to the surface of the filter material from the outside. Impurities and pollutants carried by the reverse water flow are discharged into the sewage discharge pipeline.

The working principle of internal backwash process of the central water purifier filter cartridge
Specifications
Table 1: Central Water Purifier Specifications
Model CF-M1 CF-M2
Control Valve Type Automatic filter valve
Activated Carbon Capacity 6 Kg 12 Kg
KDF Capacity 150 g 300 g
Fiberglass Tank Size 1017 1035
Recommended Flow Rate ≤ 1.5 T/H ≤ 3.0 T/H
Rated Total Purified Water Volume 38 m³ 65 m³
Applicable Water Temperature 4–38 °C
Applicable Water Source Municipal tap water
Working Pressure 0.15–0.45 MPa
Power Standard 220V / 110V 50 Hz
Inlet and Outlet Size 3/4" or 1"
Drain Outlet Size Ф18 mm
Recommended House Area 80–110 m² 100–140 m²
Product Dimensions
(L × W × H)
332 × 427 × 570 mm 332 × 427 × 1028 mm
Outer Box Dimensions
(L × W × H)
345 × 425 × 640 mm 345 × 425 × 1090 mm
Installation Dimensions
(L × W × H)
380 × 440 × 580 mm 380 × 440 × 1040 mm
The dimensional diagram of central water purifier in 2 different sizes