Developed by FSI
Filter Specialists Inc. developed the X100 as a lightweight and corrosion-resistant alternative to conventional metal filter housings.
FSI X100® Filter Housing Replacement
The FSI X100® Convertible Filter Housing has been a trusted solution for industrial liquid filtration for many years. Originally developed by Filter Specialists Inc. (FSI) and later supplied under the Pall product portfolio, the X100 became well known for its lightweight polypropylene construction and unique convertible design that allowed the same housing to be used for either bag filters or cartridge filters.
Although the original X100 housing has become increasingly difficult to source, thousands of installations remain in operation worldwide. Engineers and maintenance teams continue to search for compatible replacement housings, spare parts and filter elements that fit their existing systems.
Filtra International offers a modern compatible alternative that maintains the flexibility of the original X100 concept while incorporating modern materials, reliable sealing technology and durable glass fibre reinforced polypropylene construction.
Why our Engineers Continue Choosing the X100 Platform
Compatible replacement for the former FSI X100®
Suitable for both bag and cartridge filtration
Glass fibre reinforced polypropylene
Excellent chemical resistance
Lightweight & corrosion resistant
Worldwide supply & technical support
Compatible Filter Bags Available
Keep Your Existing X100 System Running
Replacing the filter housing is only part of the solution. Filtra International also supplies compatible X100 Size 5 filter bags in a wide range of materials and micron ratings, allowing you to keep existing filtration systems operating without modification.
Whether you require polypropylene felt, polyester felt, nylon mesh or specialty filter media, we can help you select the correct filter bag for your application.
Looking for an FSI X100® or Pall X100® Filter Housing?
If you're searching for an FSI X100®, Pall X100®, X100B or X100C filter housing, chances are you're not designing a new filtration system, you are maintaining, upgrading or replacing an existing one.
The X100 platform has been trusted in industrial filtration systems for decades. Its durable polypropylene construction, compact design and unique ability to operate as either a bag filter housing or a cartridge filter housing made it a popular choice across a wide range of industries.
Although the original X100 housing is no longer widely available, many systems remain in operation around the world. Industrial filter housings often have a service life of 15, 20 or even 30 years, making replacement availability an important consideration for maintenance engineers and purchasing teams.
Today, many companies are looking for a compatible replacement that allows them to keep existing installations operating without the need for expensive modifications or complete system replacements.
Filtra International supplies a modern alternative designed around the same proven filtration concept, providing a reliable solution for companies that continue to depend on the X100 platform.
Why replace only the housing?
Many existing filtration systems remain perfectly functional. Replacing only the filter housing is often faster, more economical and less disruptive than replacing an entire filtration skid. A compatible housing allows maintenance teams to extend the service life of existing installations while maintaining familiar operating procedures.
From industry standard to compatible replacement
The History of the X100® Filter Housing
Originally developed by Filter Specialists Inc. and later supplied by Pall Corporation, the X100 became a widely recognised polypropylene filter housing for industrial liquid filtration. Although the original Pall FSI product range has been officially discontinued, many X100 filter housings remain in use worldwide.
Convertible Filtration
The housing could be configured for either bag filtration or cartridge filtration by changing its internal components.
Supplied by Pall
After FSI became part of Pall Corporation, the X100 continued within the Pall FSI filtration portfolio.
Officially Discontinued
Pall announced that production of all FSI products, including the X100 plastic filter housing, would stop on 31 December 2020.
Compatible Filtra Replacement
Filtra International supplies a compatible replacement for users who want to continue using the proven X100 bag or cartridge filtration concept.
The original X100
From Filter Specialists Inc. to Pall Corporation
The FSI X100® Convertible Filter Housing was developed as a practical plastic filter housing for industrial liquid filtration. Its polypropylene construction provided a lightweight and corrosion-resistant alternative to many conventional metal housings.
One of the defining characteristics of the X100 was its convertible design. Depending on its internal configuration, the housing could operate with an X100 Size 5 filter bag or with a cartridge filter.
This flexibility made the X100 suitable for applications including water treatment, chemical processing, cooling water, surface treatment, desalination and general industrial liquid filtration.
After Filter Specialists Inc. became part of Pall Corporation, the product continued to be associated with both names. This is why it is still referred to as the FSI X100, Pall X100, X100B or X100C.
The current situation
Officially Discontinued, but Still Widely Used
On 27 October 2020, Pall issued an official customer notification announcing the discontinuation of the Pall FSI product range.
The notice confirmed that all FSI products would stop being manufactured on 31 December 2020. The affected product list specifically included the X100 plastic filter housing.
Original Pall FSI X100 housings are therefore no longer manufactured as part of the former product range. Many X100 filter housings nevertheless remain in use because of their practical construction and long service life.
Maintenance engineers and purchasing teams therefore continue searching for a reliable FSI X100 replacement or Pall X100 alternative without having to change the established filtration concept.
Complete X100 Product Support
X100 Filter Housings, Filter Bags and Cartridges
Filtra International supplies the complete range of products required to support existing FSI and Pall X100 installations. This includes compatible X100B bag filter housings, X100C cartridge filter housings and the replacement filter elements used inside them.
Whether you require a complete replacement filter housing or only the consumable filter elements, our team can help select the appropriate housing, filter bag or cartridge for your process.
FiltraHOUSING-X100B
X100B Bag Filter Housing
A compatible plastic bag filter housing for installations that use an FSI or Pall X100 bag configuration.
- Polypropylene filter housing construction
- Designed for industrial liquid filtration
- Suitable for compatible X100 filter bags
- Available with application-specific seal options
Consumables Available
X100 Replacement Bags
Filter Bags for X100 Housings
Filtra International supplies compatible replacement filter bags for X100B bag filter housings in a wide selection of micron ratings, materials and constructions.
Polypropylene felt
Polyester felt
Nylon mesh
Polypropylene mesh
High-efficiency media
Specialty materials
Different ring, seam, media and micron configurations can be supplied according to the liquid, operating conditions and required filtration performance.
View replacement filter bags
FiltraHOUSING-X100C
X100C Cartridge Filter Housing
A compatible plastic cartridge filter housing for installations configured around the FSI or Pall X100 cartridge arrangement.
- Polypropylene filter housing construction
- Cartridge-based filtration configuration
- Suitable for industrial liquid applications
- Replacement cartridges available separately
Replacement Cartridge Elements
Cartridges for X100C Filter Housings
In addition to the X100C filter housing, Filtra International can supply the cartridge elements required for the housing. Cartridge selection is based on the required micron rating, liquid, temperature, flow conditions and filtration objective.
Spun-bonded
Depth filtration cartridges
Pleated
High-surface-area cartridges
String-wound
Graded-density filtration
Specialty media
Application-specific options
Explore filter cartridges
Engineering Reference
X100 Filter Housing Operating Characteristics
The X100 is a compact polypropylene filter housing designed for industrial liquid filtration. The required housing configuration, sealing material and filter element should always be selected according to the actual process conditions.
Maximum permissible pressure and temperature can be influenced by the process liquid, connection type, sealing material and operating conditions. Confirm the final selection before installation.
| Housing type | Standalone plastic filter housing |
|---|---|
| Housing material | Polypropylene |
| Configurations | X100B bag housing or X100C cartridge housing |
| Maximum operating pressure | Up to 100 psi / approximately 6.9 bar* |
| Maximum operating temperature | Up to 110°F / approximately 43°C* |
| Connection options | BSP or NPT, depending on configuration |
| Flow arrangement | Side inlet and lower outlet configuration |
| Seal options | Application-dependent elastomer options |
| Filter elements | Compatible filter bags or cartridge elements |
| Primary use | Industrial liquid filtration |
* General reference values. The permissible operating limits must be confirmed for the selected housing configuration and process liquid.
Before Requesting a Quotation
Information That Helps Us Select the Correct Product
Providing the following information helps our team identify the correct housing and compatible filter element for your installation.
Existing model
FSI, Pall or other identification shown on the housing
Bag or cartridge
The type of filter element currently installed
Micron rating
The required particle-retention level
Process liquid
The fluid that will pass through the filter housing
Pressure and temperature
Normal and maximum operating conditions
Connection details
Connection size, thread type and pipe arrangement
One Supplier for the Complete X100 Range
Request a Housing Together with the Correct Filter Elements
Filtra International can supply the X100B or X100C filter housing together with the compatible filter bags or cartridge elements required for your application.
Send us the existing model number, filter details, operating conditions or photographs of the current installation. Our team will use this information to prepare an appropriate quotation.
Request an X100 Quotation
Housings, filter bags and cartridges available
Technical Selection & Quotation
Need an X100 Housing, Filter Bags or Cartridges?
Send us the details of your existing FSI or Pall X100 installation. Filtra International can help identify the correct replacement filter housing and supply the compatible filter bags or cartridge elements required for your application.
X100B bag filter housings
X100C cartridge filter housings
Filter bags in multiple media and micron ratings
Compatible replacement cartridges
Request a Complete X100 Quotation
Include a model number, photograph, process liquid, operating temperature, pressure and required micron rating where available.
Request an X100 QuotationQuotations can include the housing and its compatible filter elements.
X100 Technical Information
Frequently Asked Questions About X100 Filter Housings
Find answers about replacing discontinued FSI and Pall X100 filter housings, selecting the correct X100B or X100C configuration and ordering compatible filter bags or cartridge elements.
Housing Replacement
Is the original FSI or Pall X100 filter housing discontinued?
Yes. Pall officially discontinued the original X100 plastic filter housing range. Manufacturing ceased on December 31, 2020. Filtra International supplies compatible standalone replacement filter housings for existing X100 installations.
Does Filtra International supply a replacement for the Pall X100 filter housing?
Yes. Filtra International supplies compatible replacement housings for both principal X100 configurations:
- FiltraHOUSING-X100B: a bag filter housing for compatible liquid filter bags.
- FiltraHOUSING-X100C: a cartridge filter housing for compatible cartridge elements.
The correct version depends on the filter element and configuration used in the existing installation.
What is the difference between the X100B and X100C?
The X100B is configured as a bag filter housing and uses a replaceable liquid filter bag. The X100C is configured as a cartridge filter housing and uses cartridge filter elements. Although the housings are related, their internal element arrangements are different.
X100B
Bag filter housing
X100C
Cartridge filter housing
Can the replacement housing be installed in existing X100 pipework?
The replacement housing is designed for applications where an existing FSI or Pall X100 filter housing must be replaced. Connection size, thread standard, dimensions, available space and pipe alignment should still be confirmed before ordering.
Providing photographs and measurements of the existing installation allows our team to check the required configuration before quotation.
Is the X100 a complete filtration system?
No. The X100 is a standalone plastic filter housing. It holds a filter bag or cartridge element through which the process liquid flows. Pumps, pipework, valves, instrumentation and other process equipment are not part of the filter housing itself.
Filter Bags & Cartridges
Does Filtra International also supply filter bags for X100B housings?
Yes. Filtra International supplies compatible replacement filter bags for X100B bag filter housings. Bags are available in a broad range of commonly used micron ratings, media and constructions for industrial liquid filtration.
Available media can include:
- Polypropylene felt
- Polyester felt
- Nylon mesh
- Polypropylene mesh
- High-efficiency and specialty filter media
Are X100 filter bags available in different micron ratings?
Yes. Compatible filter bags can be supplied in multiple micron ratings. The correct rating depends on the particle size that must be retained, the required product quality, flow rate and acceptable differential pressure.
A lower micron rating provides finer particle retention but can also create a higher pressure drop or shorter service life when the liquid contains a high solids load.
Can you supply every type of filter bag for an X100 housing?
We supply a wide selection of compatible filter bags in the commonly required media, micron ratings and constructions. Selection can include different filter materials, seams, rings and performance levels.
Because not every material is suitable for every chemical, temperature or operating condition, the final bag should be selected according to the specific application.
Does Filtra International supply cartridges for X100C housings?
Yes. We can supply compatible cartridge elements for X100C cartridge filter housings. Available technologies can include spun-bonded depth cartridges, pleated cartridges, string-wound cartridges and application-specific media.
View filter cartridgesCan the filter housing and filter elements be ordered together?
Yes. A quotation can include the X100B or X100C replacement filter housing together with the appropriate filter bags or cartridge elements. This makes it possible to source both the housing and its consumable filter elements from one supplier.
Technical Selection
What pressure can an X100 filter housing withstand?
The X100 housing platform is generally associated with a maximum operating pressure of up to 100 psi, approximately 6.9 bar. This value should not be treated as an unconditional operating limit.
The permissible pressure can be affected by temperature, process liquid, housing configuration, connection type, sealing material and operating conditions. The final duty point must therefore be confirmed before installation.
What is the maximum operating temperature of an X100 housing?
A general reference value for the polypropylene X100 housing is up to 110°F, approximately 43°C. The actual permissible temperature depends on the process liquid, pressure, seal material and complete housing configuration.
Pressure and temperature limits must always be evaluated together rather than as separate specifications.
What material is the X100 filter housing made from?
The housing is manufactured from polypropylene. This provides a lightweight and corrosion-resistant alternative for many industrial liquid applications where a compatible plastic housing is appropriate.
Polypropylene is not compatible with every liquid or process condition. Chemical compatibility should therefore be checked before selecting the housing.
Can an X100 housing be used with chemicals?
It can be suitable for various chemical applications, provided that the process liquid is compatible with the polypropylene housing, seals, filter element and all wetted components.
Chemical name, concentration, temperature and pressure should be provided so that the proposed materials can be reviewed.
Which seal material should I choose?
The seal material must be selected according to the process liquid, chemical concentration, temperature and required operating life. No single elastomer is suitable for every application.
Include the complete process conditions in your quotation request so that an appropriate seal option can be considered.
Identification & Ordering
How do I identify whether I have an X100B or X100C housing?
The clearest distinction is the type of filter element inside the housing. An X100B uses a filter bag, while an X100C uses cartridge elements.
The original identification label, internal support components and photographs of the opened housing can also help determine the correct version.
What information is needed to request an X100 quotation?
Include as much of the following information as possible:
- Existing manufacturer and model number
- Photographs of the housing and product label
- Bag or cartridge configuration
- Process liquid and chemical concentration
- Normal and maximum pressure
- Normal and maximum temperature
- Connection size and thread standard
- Required micron rating
- Required quantity of housings and filter elements
Can you identify an X100 housing from photographs?
Photographs can often provide enough information for an initial identification. Useful images include the complete housing, product label, top closure, inlet and outlet connections and the internal bag or cartridge arrangement.
Measurements or additional process information may still be required before a final configuration is confirmed.
Where can I order an X100 replacement housing?
Filtra International supplies compatible X100B bag filter housings and X100C cartridge filter housings. You can request a technical quotation using the quotation page.
Request an X100 quotation