A Comprehensive Guide to Cartridge Filter Housing

Filtration systems are indispensable tools when it comes to water treatment. With cartridge filter housings, the functionality of these filters is elevated massively. To boost your comprehension of filter systems and their respective housings, this piece centers on cartridge filter housings and their variations in construction materials, functionality, and compatibility.

Cartridge Filter Housing.

What is a Cartridge Filter Housing?

A common design for cartridge filter housing involves a housing that can be either cylindrical or rectangular and is usually made from materials like stainless steel, plastic, or aluminum. The housing contains an inlet and outlet for the fluid or gas to pass through, while the cartridge filter itself is situated within the housing. These filter housings are utilized across various industries including water treatment, chemical processing, pharmaceutical manufacturing, food and beverage production, and more.

Filter housings utilized across various industries.

The Importance of Cartridge Filter Housings

● Shielding the Filter Cartridges

Water filter cartridges are generally susceptible to damage caused by water pressure, high temperatures, and other factors. The housing provides a secure and stable environment for the cartridge filters, preventing them from getting damaged or dislodged due to fluid flow pressure.

● Enhancing Filtration Efficiency

Cartridge filters housed in befitting filter housings lead to improved filtration efficiency, as contaminants are more effectively captured and removed from the fluid. This is because the cartridge filter housings securely and perfectly align the filters consequently eliminating bypass risk.

● Safe Filter Replacement

With filter housings, the cartridges are held in place, making it easy to remove and replace them without having to disassemble the entire filtration system.

● Reducing Maintenance Costs

By using cartridge filter housings, maintenance costs are reduced as the filters are protected and last longer. Additionally, the ease of replacement means that maintenance can be carried out more quickly and efficiently.

Figure 1 Cartridge filter housing.

Types of Cartridge Filter Housings

1. Single Cartridge Filter Housings

Housings for single cartridge filters are intended for accommodating a sole filter cartridge, and are compact and lightweight, making them suitable for low flow rate applications. Such filter housings are typically employed in laboratories and small-scale industrial settings where a relatively small volume of liquid needs to be filtered. These housings can be installed and maintained with ease, and are manufactured in various materials to cater to specific application needs.

2. Multiple Cartridge Filter Housings

These housings are engineered to house more than one filter cartridge. They are suitable for applications with high flow rates and high contamination levels. Multiple cartridge filter housings are commonly used in the food and beverage, chemical, and pharmaceutical industries, where large volumes of liquids need to be filtered. These housings can be configured in various ways to meet the specific requirements of the application. They are available in varied materials and sizes, and they can be used with a range of filter cartridges.

Figure 2 High-flow cartridge filter housing.

3. High-Flow Cartridge Filter Housings

High-flow cartridge filter housings are designed to hold one or more large-diameter filter cartridges. They are suitable for applications with very high flow rates and high contamination levels. The application fields of high-flow cartridge filter housings are diverse and they transcend numerous fields. They are currently highly exploited in power generation, and petrochemical industries among others. These housings are available in different sizes and materials and can be configured in various ways to meet the specific requirements of the application.

Materials for Cartridge Filter Housing

The choice of materials for cartridge filter housings can vary depending on various factors, such as the intended application, the properties of the fluid being filtered, and the surrounding environmental conditions.

● Stainless Steel

Stainless steel is a popular material for cartridge filter housings thanks to its extreme resistance to corrosion,  durability, and maintenance simplicity. It is suitable for applications involving high temperatures, pressures, and aggressive fluids. Stainless steel housings are available in different grades, including 304, 316, and 316L, which vary in their composition and performance.

● Carbon Steel

Carbon steel is another material used in cartridge filter housings. It is a strong and durable material that is suitable for applications with high flow rates and pressures. However, carbon steel is prone to rust and corrosion, and it requires regular maintenance to prevent contamination of the fluid being filtered.

Figure 3 PVC cartridge filter housing.


Polyvinyl chloride (PVC) is a thermoplastic material used in cartridge filter housings for applications involving corrosive fluids or environments. PVC housings are lightweight, resistant to chemical attacks and easily installed. Their application is however restricted to applications that do not necessitate high temperatures.

● Polypropylene

Polypropylene is a thermoplastic material used in cartridge filter housings for applications involving high flow rates and low pressures. It is resistant to chemicals and corrosion, and it can withstand temperatures up to 200°F. Polypropylene housings are often used in the pharmaceutical, food, beverage, and water treatment industries.

● Fiberglass Reinforced Plastic (FRP)

Fiberglass-reinforced plastic (FRP) is a composite material made of a polymer matrix reinforced with fiberglass. FRP housings are lightweight, durable, and resistant to corrosion, making them suitable for harsh environments. They are often used in the chemical, petrochemical, and oil and gas industries.

Figure 4 FRP Cartridge Filter Housing.

Sizing of Cartridge Filter Housings

Since filter housings differ in diameter and length, so do cartridge filter housings.  To ensure a secure fit, the housing must correspond to the size of the cartridges. Cartridges are available in different lengths, such as 10-inch, 20-inch, 30-inch, and 40-inch, with diameters ranging from 2.5 inches to 4.5 inches, which are commonly used.

Cartridge Filter Housing Selection

Cartridge filter housing selection is not as easy as it sounds. One has to deliberate on numerous elements to guarantee optimal filtration results without incurring excessive costs.

  • Construction Material: Certain materials may react with the fluid or gas being filtered so it is important that you consider the material of construction. When it comes to construction materials, you are spoiled for choice. Common materials include FRP, carbon, and stainless steel.
  • Size and Configuration: The size and configuration of the cartridge filter housing should be selected based on the flow rate and capacity required for the application. The housing size should be large enough to accommodate the required number of filter cartridges and allow for proper flow distribution.
  • Pressure and Temperature Ratings: The cartridge filter housing should be selected based on the maximum pressure and temperature of the fluid or gas being filtered. The pressure rating of the housing should be higher than the maximum operating pressure of the application, and the temperature rating should be higher than the maximum operating temperature.
  • Maintenance and Replacement: The cartridge filter housing should be designed for easy maintenance and filter cartridge replacement. The housing should have a quick-release mechanism to facilitate easy access to the filter cartridges.
  • Cost: The cost of the cartridge filter housing should be considered along with other factors to ensure cost-effectiveness. The housing should be selected based on the overall cost of ownership, including initial purchase cost, maintenance, and replacement costs.
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