Choosing the right filter housing is only one part of building an effective filtration system. The filter cartridge inside the housing also plays an important role in determining what types of particles and impurities can be removed from a liquid.
A 304 stainless steel filter housing with a replaceable cartridge provides a flexible solution for different filtration requirements. Depending on the application, the housing can be configured with a PP cotton, string wound, or stainless steel filter cartridge.
With 5-inch, 10-inch, and 20-inch housing options and 1/2″ (DN15), 3/4″ (DN20), and 1″ (DN25) port sizes, this type of filter housing can be used for a wide range of household, commercial, and industrial liquid filtration applications.
What Is a 304 Stainless Steel Filter Housing?
A stainless steel filter housing is a reusable container designed to hold a replaceable filter cartridge.
The liquid enters the housing, passes through the filter cartridge, and then exits through the outlet. Particles and other suspended impurities can be captured by the filter media, depending on the cartridge type and filtration rating.
The 304 stainless steel construction provides a durable housing for applications where a metal filter vessel is preferred over a plastic housing.
The quick-connect clamp design also allows the housing to be opened for cartridge installation, replacement, and routine maintenance.
Three Filter Cartridge Options
One of the advantages of this filter housing is that it can be configured with different types of filter cartridges.
The three available options are:
- PP Cotton
- String Wound
- Stainless Steel
Each cartridge has different characteristics and can be selected according to the application.



1. PP Cotton Filter Cartridge
PP cotton cartridges are commonly used for general sediment and particle filtration.
They can help remove suspended particles such as:
- Sand particles
- Rust particles
- Dirt
- Sediment
- Other suspended solids
PP cotton cartridges are often used as a pre-filtration stage before finer filtration or other water treatment processes.
For example, a PP cotton cartridge can be used to protect downstream equipment by reducing larger suspended particles before the liquid enters the next filtration stage.
For household and light commercial applications, PP cotton can be a practical choice when the main requirement is general sediment filtration.
2. String Wound Filter Cartridge
A string wound cartridge is made by winding filtration material around a central core.
Its structure provides a large filtration surface and is commonly used for sediment and suspended particle filtration.
Depending on the cartridge specification, string wound filters can be used for applications involving:
- Sand
- Dirt
- Rust
- Sediment
- Suspended particles
String wound cartridges can be useful when a filtration system needs a different type of sediment filter compared with a standard PP cartridge.
They can also be used as part of a multi-stage filtration system.
3. Stainless Steel Filter Cartridge
The stainless steel cartridge provides a metal filtration option inside the 304 stainless steel housing.
Compared with disposable filter media, a stainless steel cartridge may be preferred in applications where the user wants a durable metal filter element.
Typical applications can include:
- Industrial liquid filtration
- Process filtration
- Pre-filtration
- Reusable filtration systems
- Applications where a stainless steel filter element is preferred
The actual filtration performance depends on the design and filtration rating of the stainless steel cartridge.
PP Cotton vs. String Wound vs. Stainless Steel
So which cartridge should you choose?
There is no single cartridge that is best for every application.
| Filter Cartridge | Main Use | Typical Application |
|---|---|---|
| PP Cotton | General sediment and particle filtration | Household, commercial, pre-filtration |
| String Wound | Sediment and suspended particle filtration | Water and general liquid filtration |
| Stainless Steel | Durable metal filtration option | Industrial and process applications |
The correct choice depends on the liquid being filtered, the type of particles present, the required filtration rating, and the design of the overall filtration system.
Can a 304 Stainless Steel Filter Housing Be Used at Home?
Yes, depending on the application and system design.
A small stainless steel cartridge filter housing can be used as part of a household water filtration or pre-filtration system.
For example, it may be installed to help reduce sediment and suspended particles before water enters downstream equipment.
The 5-inch and 10-inch configurations can be suitable for compact systems where space is limited, while larger configurations can provide more filter capacity depending on the system requirements.
However, a filter housing itself should not be considered a complete drinking-water purification system.
The ability to remove bacteria, viruses, dissolved chemicals, heavy metals, or other specific contaminants depends on the filter media, filtration rating, treatment process, and applicable certifications.
Therefore, customers should select the cartridge according to the actual water quality and filtration requirements.

Can It Be Used for Industrial Applications?
Yes.
The 304 stainless steel construction and replaceable cartridge design make this type of filter housing suitable for various industrial and process liquid filtration applications.
Potential applications include:
Process Water Filtration
Used as a pre-filtration stage to reduce suspended particles before downstream equipment.
Industrial Fluid Filtration
Suitable for general liquid filtration where a stainless steel filter housing is required.
Food and Beverage Processing
Can be used as part of appropriate liquid filtration systems, subject to the specific system design, material requirements, and applicable regulations.
Equipment Protection
A pre-filter can help reduce larger particles entering pumps, valves, pipelines, or downstream filtration equipment.
Commercial Water Systems
The housing can also be incorporated into commercial or building-level water filtration systems where the selected cartridge meets the application requirements.
How Does the Quick-Connect Design Make Maintenance Easier?
Routine filter replacement is an important part of cartridge filtration.
This housing uses a quick-connect clamp design, allowing the housing to be opened without removing the entire vessel from the system.
A typical maintenance process involves:
- Shut down the filtration system.
- Relieve pressure according to the system procedure.
- Open the quick-connect clamp.
- Remove the used cartridge.
- Install the replacement cartridge.
- Check the seal and close the housing.
- Restart the system and check for leaks.
The exact maintenance procedure should always follow the requirements of the installed system.
Available Housing Lengths and Port Sizes
The HaoqinTech 304 stainless steel quick-connect filter housing is available in three housing lengths:
- 5 Inch
- 10 Inch
- 20 Inch
Three port size options are also available:
- 1/2″ (DN15)
- 3/4″ (DN20)
- 1″ (DN25)
This allows customers to select a configuration that matches their filtration system and existing pipe connection.
The housing can be supplied with:
- PP Cotton Cartridge
- String Wound Cartridge
- Stainless Steel Cartridge
How to Choose the Right Configuration
Before ordering a stainless steel filter housing, consider these five factors:
1. What liquid are you filtering?
Determine whether you are filtering water, process liquid, or another compatible fluid.
2. What type of particles need to be removed?
Consider whether the main concern is sediment, rust, sand, dirt, or other suspended particles.
3. Which cartridge type is appropriate?
Choose between PP cotton, string wound, and stainless steel according to the application and required filtration performance.
4. What housing length do you need?
Select 5″, 10″, or 20″ according to the available installation space and filtration requirements.
5. What port size matches your system?
Choose 1/2″ (DN15), 3/4″ (DN20), or 1″ (DN25) according to the connection requirements of your piping system.
Why Choose a 304 Stainless Steel Cartridge Filter Housing?
A reusable stainless steel housing provides flexibility because the housing can be used with different cartridge configurations.
Instead of replacing the complete filter housing, users can replace the cartridge when required.
For different applications, customers can choose:
304 Stainless Steel Housing + PP Cotton Cartridge
or
304 Stainless Steel Housing + String Wound Cartridge
or
304 Stainless Steel Housing + Stainless Steel Cartridge
This makes the same basic housing platform adaptable to different filtration requirements.
Final Thoughts
A 304 stainless steel filter housing can be a practical solution for both household and industrial liquid filtration applications when properly matched with the right filter cartridge.
The three cartridge options provide different choices:
- PP Cotton — a practical option for general sediment and particle pre-filtration
- String Wound — suitable for sediment and suspended particle filtration
- Stainless Steel — a durable metal filter option for applications requiring a stainless steel filter element
With 5-inch, 10-inch, and 20-inch housing lengths and 1/2″ (DN15), 3/4″ (DN20), and 1″ (DN25) port options, customers can select a configuration based on their filtration system and application requirements.
HaoqinTech supplies 304 stainless steel quick-connect filter housings with PP cotton, string wound, and stainless steel cartridge options for different filtration applications.

Looking for a stainless steel cartridge filter housing for your application?
Contact HaoqinTech for product information, configuration options, and factory-direct supply.











