Whole House & Under-Sink Water Filters
My name is Donghe Gao. I am an engineer with 11 years of experience in water and electrical work. Our factory directly supplies two kinds of equipment: whole house water filter systems, and under-sink ultrafiltration water filters — from stainless steel machining to filter R&D, production and assembly testing, every step is completed in our own factory. Before shipping, every unit goes through 100% inspection.
Three things I take responsibility for
01
Choosing the right system
We look at the water quality in your home and advise which whole house water filter system or under sink water filter fits it — hard water, high TDS, well water, municipal tap water, sediment, rust, water for daily use or water for drinking. We start from your situation, not from our product list.
02
Product quality
We are the source factory, with full quality control under one roof: material selection, machining and production, and final assembly all happen inside our factory. A complete quality management system means every unit passes 100% inspection before it leaves, and finished products meet the relevant testing requirements — certificates are available on request, just ask me.
03
After-sales and warranty
Because we put heavy resources into materials and R&D, our products last longer than most peers: the stainless steel housing stays rust-free and leak-free for 10 years, and is warranted for 10 years. The cartridges are designed for a 5-year life under ideal conditions — real-world water differs from home to home, so we warranty them for 3 years under normal maintenance.
Two product lines
Whole-house sediment pre-filter
Filtering yellow, muddy water and turbidity is its strength — and when the element clogs, a wash restores the flow substantially. The housing is 316L stainless steel for better corrosion resistance, tested through more than 100,000 water-hammer cycles. Inside is a 0.1 µm PVDF ultrafiltration membrane installed at the point of entry, easily handling the sediment, rust, suspended solids, parasite eggs and turbidity that wells, surface water and old pipe networks deliver — protecting the water for the whole house. If your water comes from a well or a river, start with the well water filtration guide.
It is backwashable: when the membrane clogs in daily use, a rinse restores most of the flow, so the cartridge keeps working for years instead of being replaced frequently — and besides turbidity it screens out some bacteria as well.
Under-sink water filter
No waste water, no electricity for filtration. A four-stage composite cartridge: a pleated pre-filter and PP cotton take out the large particles, activated carbon fiber adsorbs most of the residual chlorine and improves taste, and at the core is a 0.01 µm PVC hollow-fiber membrane that helps reduce the remaining chlorine while filtering out colloids, bacteria and some viruses — leaving the dissolved minerals in your water where they are. 8–10 L/min at normal household pressure. The right answer when the water is already safe, but you are not sure about the last stretch of pipe into your building. See the full under sink water filter specifications on the product page.
The four stages, in order: a pleated sediment filter, an activated-carbon-fiber stage, a second pleated sediment filter, and a chlorine-removal ultrafiltration membrane. The pleated stages catch the large particles, the carbon fiber takes out most of the residual chlorine and improves taste, and the final membrane gives the chlorine a second pass while filtering out bacteria, colloids and some viruses.
How to choose a water purifier: three steps first
The order matters more than the brand. Step one, look at your water source and its quality — well water, river water, or municipal tap water: different impurities call for different systems. Step two, look at two numbers — the rated capacity and the flow rate — because they decide what the system costs you in the years after. Step three, and only then, the brand — a brand decides the price, not the quality of the water. I walk through all three steps, with real cases, in my Buyer’s Guide.
Latest from the blog
Before you buy a water purifier, read this
How do you choose a whole house water filtration system for your home? Three steps. First, look at your water source and its quality — that decides which type of purifier you need. Second, read the parameters, not the advertising — it can save you a lot in maintenance costs. Third, a big brand or direct from the factory? Let your budget decide. The guides walk through each step in detail.
Frequently asked questions
How long are the housing and the cartridges covered?
The stainless steel housing is rust-free and leak-free for 10 years, and warranted for 10 years. The cartridges are designed for a 5-year life under ideal water conditions — real water differs from home to home, so they are warranted for 3 years under normal maintenance. When a cartridge gets clogged in daily use and the flow drops, a cleaning restores most of its capacity.
Can ultrafiltration handle well water?
It depends on how cloudy the well is. The backwashable 0.1-micron PVDF whole-house prefilter is built for high-turbidity sources like well and river water — its cartridge rinses clean and works again. The 0.01-micron PVC under-sink ultrafiltration is for compliant municipal water; if you want to drink well water safely, add a PVDF whole-house prefilter at the point of entry. The two stages divide the work — one guards the house, one guards the tap.
Ultrafiltration or reverse osmosis — how do I choose?
Ultrafiltration keeps the minerals in your water, runs without electricity and wastes no water — on compliant municipal water it is the low-hassle choice for most families. Reverse osmosis removes far more dissolved solids — it suits hard-water areas or families who want fully demineralised water. I have written both sides honestly; choose by your water source and your budget.