Taking Apart a Home Water Purifier: Small Parts, Big Impact—Every One Matters for Your Drinking Water Health!
You use your home water purifier every day—just turn on the tap and clean water flows out—but do you really understand how it works?
Hidden inside its compact body are more than a dozen components of various sizes, from the core filter cartridges to the unassuming water hoses and wrenches, and from the circuit board controlling the electrical system to the solenoid valve regulating water flow. Each part plays a specific role, working together to safeguard your family’s drinking water safety.
Today, let’s take a comprehensive look at all the internal components of a home water purifier. By understanding their functions and roles, you’ll never be at a loss when replacing consumables or troubleshooting minor issues again!
I. The Core Filtration Team: The “Main Force” of Water Purification—Water Quality Depends Entirely on Them
The core mission of a water purifier is to filter out impurities, and the filter cartridges are the absolute main force behind this task. As consumables that require regular replacement, they directly determine the quality of the purified water.
1. PP Cotton Filter Cartridge
As the first line of defense in water purification, the PP cotton acts like a coarse filter, specifically designed to trap large particles such as silt, rust, insect eggs, and suspended solids. This prevents these impurities from clogging subsequent filter cartridges and components. It typically needs to be replaced every 3–6 months and is the “biggest consumer” among consumables.
2. Granular Activated Carbon/Compressed Activated Carbon Filter
After preliminary filtration by the PP cotton, the water passes through the activated carbon filter. Its primary function is adsorption, effectively removing residual chlorine, odors, pigments, and certain organic compounds from the water. This improves the taste, making the water fresher and sweeter, and eliminates the “bleach-like taste” often found in tap water. Its service life is typically 6–12 months.
3. RO Reverse Osmosis Membrane
This is the heart of the water purifier and the filter with the highest filtration precision. It precisely removes harmful substances such as heavy metals, bacteria, viruses, and scale-forming ions from the water. The filtered water meets direct drinking standards, making it the core component of the water purifier. It has a relatively longer lifespan and is generally replaced every 2–3 years.
4. Post-Filter Activated Carbon Cartridge
The final filtration stage further enhances the water’s taste and texture, adjusts its pH level, and makes the drinking water smoother and more pleasant, extending the overall drinking experience. It should be replaced approximately every year.
II. Electrical Control Components: The “Brain and Nervous System” of the Water Purifier, Controlling the Operation Rhythm
Filters alone are not enough; these electronic components are responsible for controlling the water purifier’s start/stop functions and regulating water flow, serving as the “command center” for the machine’s normal operation.
1. Control Board
Located in a prominent position on the water purifier’s body, this serves as the “brain” of the system. It displays the machine’s operational status in real time, presenting information such as water production, flushing, low water level, full tank, and fault alerts. This allows users to intuitively understand the machine’s operation and quickly troubleshoot any issues.
2. Inlet Solenoid Valve
This valve controls the flow of raw water into the purifier. When energized, it opens to allow tap water to enter the filtration system; when de-energized, it closes to cut off the water supply, preventing continuous inflow. It precisely regulates the water intake process to avoid wasting water resources.
3. Wastewater Solenoid Valve
Working in conjunction with the RO membrane filter, this valve discharges wastewater generated during the filtration process while regulating the wastewater ratio. This ensures the RO membrane produces water normally, maintaining filtration effectiveness while reasonably controlling wastewater discharge.
4. Low-Pressure Switch
When the tap water supply stops or water pressure drops too low, the low-pressure switch automatically cuts off the power, stopping the water purifier. This protects the machine from running under no load and prevents damage to components such as the water pump caused by idling.
5. High-Pressure Switch
When the purified water tank is full and water pressure reaches the preset value, the high-pressure switch automatically cuts off the power, stopping the water purifier from producing water. When the tank runs low and water pressure drops, it automatically restarts production, achieving automatic start-stop functionality that saves both energy and hassle.
III. Connections and Auxiliary Accessories: Unassuming Yet Indispensable, Ensuring Installation and Operation
These small accessories may seem ordinary, but they are crucial for the installation, operation, and maintenance of the water purifier. Without them, the machine simply cannot function properly.
1. Connection Hoses
The “blood vessels” of the water purifier, responsible for transporting raw water, purified water, and wastewater. Typically made of food-grade materials, they are non-toxic and odorless, ensuring smooth water flow. They connect all filter cartridges and components to form a complete water circulation system.
2. Filter Housing Wrench
A specialized tool for replacing filter cartridges, designed to unscrew the filter housing. It allows for easy removal of old cartridges and installation of new ones without excessive force, preventing damage to the housing. It is an essential tool for replacing consumables.
3. Scissors
An auxiliary tool for installing water hoses, used to trim the hoses to the correct length. This ensures a tighter, more secure connection and prevents leaks, making it a practical helper during installation and maintenance.
IV. Practical Tips: Component Maintenance + Replacement to Extend the Water Purifier’s Lifespan
1. Replace filter cartridges on schedule: Don’t wait until the water flow decreases or the water develops an odor to replace them. Strictly adhering to the replacement cycle ensures effective filtration and protects other components from wear caused by impurities.
2. Inspect Components Regularly: Periodically check for aging or leaking hoses, ensure solenoid valves and switches are responsive, and verify that the control panel display is functioning normally. Address minor issues promptly to prevent major malfunctions.
3. Use the Right Tools for Maintenance: When replacing filter cartridges, always use a dedicated filter housing wrench; do not use ordinary tools to force them open, as this can damage the housing and components. Use specialized scissors to cut hoses to ensure clean, even cuts.
Conclusion
A home water purifier is never just a single appliance; it is a “water purification system” where countless small components work in harmony. Every solenoid valve, every switch, every filter cartridge—even the smallest wrenches and scissors—silently plays its part, safeguarding every drop of water we drink.
After reading this teardown guide, do you have a new appreciation for your home water purifier? When it comes to future maintenance or replacing consumables, simply refer to these components to get started with ease. This will help keep your water purifier in top condition and ensure your family has access to healthy drinking water for years to come.
