FAQS
A pre-filter is a primary physical filtration device installed upstream of the main water supply pipe, after the water meter.
Its core functions include:
Physical interception: Utilizing an internal fine filter screen (usually made of stainless steel), it removes particulate contaminants larger than the filter screen pore size from tap water using purely physical methods, such as silt, rust, and solid impurities.
System protection: As the first line of defense for the water system, it effectively protects downstream water purification equipment, water heaters, washing machines, and other water-using appliances from clogging and wear caused by coarse impurities.
This is primarily determined by observing the amount of impurities accumulated inside the transparent filter cartridge and changes in water pressure. When a large amount of sludge is visible inside the filter cartridge, or when the water flow in the home slows significantly (indicating a drop in water pressure), a flushing operation is necessary. Modern pre-filters are typically equipped with a pressure gauge or a flushing reminder function.
The mesh size of a filter determines the minimum size of particles it can intercept. The mesh size of mainstream products on the market ranges from 40 to 100 micrometers (µm). Generally, a mesh size of 40-50 µm is sufficient to protect water pipes and critical water-using equipment. Local water quality should be considered when choosing a filter: in areas with poor water quality, a finer mesh can be selected, but it should be noted that this may increase the frequency of rinsing.
A properly designed and installed pre-filter has minimal impact on the water pressure of the water supply system and typically meets excellent engineering standards (low pressure loss, approximately 0.1-0.2 bar).
“For commercial or industrial projects prioritizing system reliability, long-term operational efficiency, and minimized maintenance costs, we strongly recommend selecting the Back-Flushing model. Although the initial investment may be slightly higher, its superior cleaning capability ensures maximum lifespan for both the filter element and subsequent purification equipment, ultimately achieving a better TCO (Total Cost of Ownership).”
Reverse Osmosis (RO) Membrane: Confirm that the equipment uses industry-standard reverse osmosis technology, which is the core for achieving high-precision water purification.
Rated Salt Degradation Rate: This is a key indicator of reverse osmosis membrane performance. Professional-grade equipment must guarantee a stable salt degradation rate of 95% or higher to reliably remove heavy metal ions, microorganisms, viruses, and other harmful substances.
Filter Cartridge Structure: Evaluate the configuration of its multi-stage filtration system (e.g., PP cotton, activated carbon, RO membrane, post-activated carbon). High-quality systems should employ composite or integrated filter cartridge designs to simplify maintenance and ensure purification efficiency at each stage.