Water Purifier
Manufacturer & Supplier in China
When you source water purifiers from Legom, you specify systems engineered around 1 invention patent and 6 innovation patents, combining a 40μm dual-net interception stage, 360° universal water inlet, dual water shut-off, anti-water-hammer structure, and a lead-isolated safe copper waterway that is non-toxic, antibacterial, and corrosion resistant. Fitted with the RO reverse osmosis cartridge, the central filter reaches 0.01μm and produces drinkable water that complies with the national Reverse Osmosis Treatment Device standard. This patented no-tool, 5-second cleaning design, washable without closing the main valve, is something most conventional Chinese pre-filter manufacturers do not offer.
Product Range
Legom manufactures a range of central water filters and quick-disassembly washable pre-filters for whole-house, point-of-entry water filtration. The range is built around a dual-net rotation system with 40μm interception, a gear linkage mechanism for clog-free cleaning, a 360° universal water inlet, and an anti-water-hammer structure that protects downstream appliances. Every unit carries 1 invention patent and 6 innovation patents, and is produced at our own facility in Jiaxing, Zhejiang Province, with full OEM and ODM customization available across every model.
Water Filter Categories
| Category | Format | Core Function | Typical Use |
|---|---|---|---|
| Central Water Filter | Whole-house, point of entry | 40μm dual-net plus interchangeable cartridges | Whole-house filtration, drinkable with RO cartridge |
| First-Generation Pre-Filter (S07) | Point of entry, pipe-mounted | 40 to 60μm precision interception | Whole-house pre-filtration |
| Second-Generation Pre-Filter | Point of entry, pipe-mounted | 40 to 60μm interception, higher flow | Whole-house pre-filtration at 7000 L/H |
| Filter Cartridges | Replaceable inserts | PP cotton, activated carbon, carbon fiber, RO | Matched to water quality and drinkability |
Core Technologies and Features
Legom water filters share the same core engineering across the range, with nine key features carried from one model to the next:
| Feature | What It Does |
|---|---|
| Dual-Net Rotation (40μm) | Intercepts particles, hair, rust, sediment, and insect eggs |
| Gear Linkage System | Drives smooth rotation and clog-free cleaning of the filter |
| No Tools, 5-Second Quick Release | Disassemble and wash without tools or closing the main valve |
| Dual Water Shut-Off | Stops inlet and outlet flow together to prevent backflow when cleaning |
| 360° Universal Water Inlet | Freely switchable inlet for flexible installation in any layout |
| Anti-Water-Hammer System | Prevents pressure surges and protects downstream water appliances |
| Lead Isolation Waterway | Lead-isolated safe copper head, non-toxic, antibacterial, corrosion resistant |
| Aero-Grade Alloy Body | Aero engine alloy material with a double-layer body that slows aging |
| Filter Dynamic Stabilization | Keeps multi-spec filters calibrated and sealed during use |
Central Water Filter
A whole-house central filter with a double-layer body, dual water shut-off, and an observation window to check filter status. It accepts a range of cartridges, from PP cotton through to a reverse osmosis cartridge for drinkable water, so a single unit can be configured for sediment removal or full drinking-water purification. See the Central Water Filter for full details.
Filter Cartridge Options
The central filter works with several cartridge types, so the same body can be matched to local water quality and to whether drinkable water is required:
| Filter Option | Drinkable | Precision | Replacement |
|---|---|---|---|
| PP Cotton | No | 5 μm | 3 months |
| PP Cotton + Activated Carbon | No | 5 μm | 4 months |
| PP Cotton + Carbon Fiber | No | 5 μm | 1 year |
| PP Cotton + RO Reverse Osmosis | Yes | 0.01 μm | 1 year or more |
First-Generation Pre-Filter (S07)
The first-generation precision central pre-filter, using dual-net rotation at 40 to 60μm to intercept particles, rust, and sediment at the point of entry. It installs with a freely switchable universal inlet and washes in seconds without tools. See the First Pre-Filter for full details.
Second-Generation Pre-Filter
The upgraded second-generation quick-detachable washable pre-filter, with the same 40 to 60μm interception and a higher purification flow of 7000 L/H for homes that need more throughput. See the Second Pre-Filter for full details.
The Legom water filter range is regularly expanded with new models and cartridge configurations. The models above reflect the current lineup. Contact the Legom Technical Team for the latest models, full specifications, and flow data to match your water source and market.
How to Select the Right Water Filter
Choosing the correct unit comes down to where it sits in the water line, what you need to remove, and the flow and pressure of your supply. Confirm these three points before ordering:
Where it sits in the water line
Decide the role. A pre-filter sits at the point of entry to protect the whole house and downstream appliances from coarse particles, while a central water filter can both pre-filter and, with the right cartridge, produce drinkable water at the same location.
What you need to remove
Match the cartridge to the water. The 40μm dual-net stage captures particles, hair, rust, sediment, and insect eggs, PP cotton and carbon cartridges refine down to 5μm and reduce odour and chlorine, and a reverse osmosis cartridge reaches 0.01μm for drinkable water. Pick the stage that fits your supply.
Flow, pressure, and water source
Size the unit to the supply. Legom filters run on municipal tap water and well water at 0.1 to 1.5 MPa and 0 to 40°C, with purification flow up to 7000 L/H. A larger household or higher demand favours the higher-flow second-generation pre-filter.
Once you have these three points, the Legom engineering team can recommend the right model and cartridge, or start a custom OEM project. Contact us via WhatsApp or info@legomsmart.com.
Manufacturing Capacity
Legom's water filters are produced at our facility in Jiaxing, Zhejiang Province, China, with in-house alloy body machining, gear linkage and dual-net mechanism assembly, lead-isolated copper waterway integration, and pressure and leak testing on every unit. This integrated production gives consistent quality and batch-to-batch repeatability for distributors and brand owners worldwide, and lets us add new models to the range without disrupting supply.
| Parameter | Detail |
|---|---|
| Production Location | Jiaxing, Zhejiang Province, China |
| Product Types | Central water filter, first and second generation pre-filters, filter cartridges |
| Core Features | Dual-net rotation, gear linkage, anti-water hammer, lead isolation, universal inlet |
| Filtration Accuracy | 40 to 60μm pre-filter, down to 0.01μm with RO cartridge |
| Water Purification Flow | Up to 7000 L/H |
| Applicable Water Pressure | 0.1 to 1.5 MPa |
| Applicable Water Temperature | 0 to 40°C |
| Applicable Water Source | Municipal tap water, well water |
| Patents | 1 invention patent, 6 innovation patents |
| Quality Inspection | Pressure and function testing on every unit |
| Primary Export Markets | 90+ countries served globally |
| Shipping Methods | Sea freight / Air freight / Express courier |
| OEM Partners | 400+ globally |
As a direct manufacturer, Legom supplies water filters to HVAC distributors and brand owners across 90+ countries through 400+ OEM partners. The company also produces a full range of HVAC and underfloor heating products, including heat pumps, manifolds, floor heating pipe, room thermostats, and air purifiers.
Production Process
7-Stage Production Process
Every Legom water filter passes a structured 7-stage process, ensuring the build quality, sealing integrity, and verified pressure performance that B2B buyers depend on at scale.
Material Intake
Alloy body, copper heads, filter media, and gears inspected for grade and specification
Body Machining
Aero-grade alloy and double-layer body machined and prepared for the internal mechanism
Dual-Net and Gear Assembly
Dual-net filter and gear linkage fitted for smooth rotation and clog-free cleaning
Waterway Integration
Lead-isolated safe copper head and dual shut-off waterway integrated and sealed
Stabilization and Sealing
Filter dynamic stabilization set so multi-spec cartridges stay calibrated and sealed
Pressure and Leak Testing
Each unit pressure tested and checked for leaks, backflow, and water hammer control
Final QC and Packaging
Function, finish, and labelling verified before packaging for export
Each Legom water filter is produced through this controlled process at our Jiaxing facility. Inspected materials are machined into the alloy body, then the dual-net filter, gear linkage, and lead-isolated copper waterway are assembled and sealed. The filter dynamic stabilization is set, and every unit is pressure and leak tested before passing a final quality check and packaging for export.
What Legom's OEM Service Covers
Legom's OEM and ODM service for water filters covers the full development and production cycle:
- ● Model selection: Legom's engineering team helps you select the right model, from a point-of-entry pre-filter to a full central water filter, based on your target water source and market.
- ● Cartridge configuration: PP cotton, activated carbon, carbon fiber, and RO cartridges can be matched to the contaminants and the level of purification you need.
- ● Branding and appearance: Body finish, logo, and packaging can be customized to your brand for private-label supply.
- ● Sample and approval cycle: Samples are produced and pressure tested against your specification before production commitment.
- ● Production batch testing: Pressure and function test records are available for production batches.
- ● Confidentiality: All OEM and ODM projects are handled under strict NDA.
Applications
Legom water filters are used wherever cleaner, safer water is needed at the point of entry, from a single apartment to a whole building. The range covers residential, commercial, and renovation projects on both municipal and well water.
Whole-House Point of Entry
Central filters and pre-filters at the main inlet remove sediment, rust, and particles before water reaches taps, heaters, and appliances throughout the house.
Kitchen and Drinking Water
Fitted with the RO reverse osmosis cartridge, the central water filter reaches 0.01μm precision to deliver drinkable water at the kitchen.
Apartments and Residential
The compact body and 360° universal inlet suit tight utility spaces in apartments and houses, with tool-free cleaning that any resident can manage.
Well Water and Rural Supply
Rated for well water as well as municipal supply, the dual-net stage handles the heavier sediment and rust loads common on private and rural sources.
Commercial Premises
Higher-flow pre-filters at up to 7000 L/H protect plumbing and equipment in restaurants, offices, and small commercial buildings.
New Build and Renovation
The anti-water-hammer structure and flexible inlet make these filters easy to design into new plumbing and refurbishment projects where appliance protection matters.
Frequently Asked Questions
Legom manufactures central water filters and quick-disassembly washable pre-filters for whole-house, point-of-entry filtration, along with a range of replaceable cartridges. The range includes a central water filter, a first-generation pre-filter (S07), and a higher-flow second-generation pre-filter, all produced in-house at our Jiaxing facility.
The 40μm dual-net stage intercepts particles, hair, rust, sediment, and insect eggs from the incoming water. It uses a dual network rotation design for fast, thorough cleaning, which protects taps, heaters, and other appliances downstream from coarse contaminants.
The PP cotton plus RO reverse osmosis cartridge produces drinkable water, filtering down to 0.01μm. The PP cotton, PP cotton plus activated carbon, and PP cotton plus carbon fiber cartridges filter to 5μm and are intended for general filtration rather than drinking water.
No. The dual water shut-off stops flow at both the inlet and outlet at the same time, so you can disassemble and wash the filter in about 5 seconds without tools and without closing the main valve. This is one of the features that sets the Legom design apart from conventional pre-filters.
Water hammer is the pressure surge that happens when flow stops suddenly, which over time can damage pipes and appliances. Legom's anti-water-hammer structure absorbs these surges, protecting all downstream water appliances in complex residential plumbing.
Legom water filters are rated for municipal tap water and well water, at a water pressure of 0.1 to 1.5 MPa and a temperature of 0 to 40°C. Purification flow runs up to 7000 L/H on the second-generation pre-filter, which suits larger households and higher demand.
It depends on the cartridge and local water quality. As a guide, PP cotton lasts around 3 months, PP cotton plus activated carbon around 4 months, PP cotton plus carbon fiber around 1 year, and the RO reverse osmosis cartridge 1 year or more. The 40μm dual-net stage itself is washable and reusable, not replaced.
A pre-filter sits at the point of entry and removes coarse contaminants down to 40 to 60μm to protect the whole plumbing system. A central water filter does the same coarse filtration but also accepts finer cartridges, including a reverse osmosis option, so it can refine the water further and even produce drinkable water from the same unit.
Yes. Legom is a direct manufacturer offering full OEM and ODM services for water filters, including model selection, cartridge configuration, body and branding, and packaging. All customization projects are handled under strict confidentiality. Contact our team to discuss your requirements.
Legom is a manufacturer. Our water filters are produced at our own facility in Jiaxing, Zhejiang, China, with in-house body machining, dual-net and gear assembly, lead-isolated copper waterway integration, and pressure testing. The range holds 1 invention patent and 6 innovation patents, and we supply distributors and brand owners in 90+ countries directly.