Filter Housing: Complete Guide to Types, Price, Uses, Cartridge Housings, 20-Inch Filter Housings, Pre-Filter Sets, and Best Options for RO Systems

Filter housing is one of the most important components in water purification systems, RO plants, industrial filtration processes, and domestic water purifiers. It is the protective casing that holds the filter cartridge and ensures smooth, contamination-free water flow through the filtration system. Without a high-quality filter housing, even the best filter cartridges cannot perform efficiently.

This comprehensive guide covers everything you need to know about filter housing, including water filter housing types, cartridge filter housing, 20-inch filter housing, bag filter housing, transparent housings, filter housing price, RO filter housing kit, pre-filter housing, filter housing HS code, replacement options, and more.
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What Is a Filter Housing?

Filter housing is a protective casing made of plastic, stainless steel, or industrial polymer that encloses the filter cartridge. It creates a sealed environment that forces water to pass through the filter media, ensuring particles, sediments, contaminants, and impurities are removed.

A water filter housing plays three essential roles:

1. Holding the filter cartridge securely

2. Maintaining pressure inside the filtration unit

3. Preventing contamination during filtration

Without a reliable filter housing, filtration efficiency decreases, leakage may occur, and membranes or downstream equipment may get damaged.

Importance of Filter Housing in Water Purification

Filter housing plays an essential role in:

RO systems
Industrial water treatment plants
Domestic water purifiers
Commercial filtration units
Swimming pools
Food and beverage filtration
Pharmaceutical industries
Chemical filtration systems

Key benefits include:

Dust, rust, sand, and sediment removal
Protecting downstream filters
Maintaining water pressure
Increasing purification efficiency
Extending RO membrane life

Every treatment stage in an RO system uses a filter housing, including pre-filter housing, carbon filter housing, and sediment filter housing.

Water Filter Housing: An Overview

Water filter housing is most commonly used in:

Household RO purifiers
Under-sink water filters
Whole-house water filters
Industrial RO plants
Commercial establishments
Hotels and restaurants
Hospitals and laboratories

The housing material is usually:

Polypropylene (PP)
ABS
Stainless steel
Polycarbonate (for transparent housings)

Transparent filter housings make it easier to check cartridge condition without opening the unit.

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Filter Housing Types

There are several types of filter housings depending on size, application, and material. Understanding the types helps in selecting the right filter for your RO system or industrial plant.

1. Standard PP Filter Housing

These are made of polypropylene and used in domestic and small commercial RO systems.

2. Transparent Filter Housing

Made from polycarbonate, suitable for monitoring cartridge condition.

3. 10-Inch Filter Housing

Commonly used in domestic RO systems and under-sink purifiers.

4. 20-Inch Filter Housing

Used for whole house filters, commercial RO units, and industrial plants.

5. Bag Filter Housing

Typically used in industrial filtration to remove large contaminants.

6. Stainless Steel Filter Housing

Used in chemical, pharmaceutical, and food industries for high durability.

7. High-Flow Filter Housing

Designed for systems requiring higher water flow rates.

8. Multi-Cartridge Filter Housing

Used in industrial treatment where multiple cartridges operate together.

9. Jumbo Filter Housing

Designed for large sediment and carbon filters.

10. Pre Filter Housing

Installed before the RO membrane to enhance filtration efficiency.

Each type of filter housing serves specific filtration needs.

Cartridge Filter Housing: What You Must Know

Cartridge filter housing is widely used in domestic, commercial, and industrial water treatment applications. It hosts a cartridge that removes:

Sediments
Chlorine
Bad odor
Impurities
Rust
Suspended particles

Cartridge filter housing types include:

Spun filter housing
Carbon cartridge housing
Pleated filter housing
Micron filter housing

Cartridge filter housing ensures filters fit securely and operate at optimal pressure.

Filter Housing Transparent: Why It Is Popular

Transparent filter housing is widely preferred for home RO systems and commercial pre-filter units. The clear body allows users to see the filter cartridge’s condition instantly.

Benefits include:

Easy sediment visibility
Timely filter replacement
Better monitoring
Convenience during servicing

Transparent filter housings are typically available in 10-inch and 20-inch sizes.

Filter Housing 20 Inch: Best for High-Flow Systems

20-inch filter housing is essential for:

Whole house water purification
Industrial RO plants
Commercial water filtration
Large-scale pre-filter systems

20-inch housings can handle:

Higher water flow
Higher sediment load
Larger filter cartridges
Longer operational life

A 20-inch filter housing is available in both:

20-inch standard
20-inch jumbo

Bag Filter Housing

Bag filter housing is used in industrial filtration applications where large impurities need to be removed. It is typically used in:

Chemical industries
Pharmaceutical filtration
Food processing
Oil and petrochemical filtration
High-flow industrial water treatment

The filter bag sits inside the housing and captures contaminants as water flows through.

Filter Housing HS Code

The filter housing HS code is:

HSN Code: 8421

This includes:

Water filter housings
Cartridge filter housings
Bag filter housings
RO pre-filter housings

HS code 8421 is applicable to filtering or purifying machinery for liquids.

RO Filter Housing Price

RO filter housing price depends on:

Material
Size
Brand
Type
Pressure rating
Application

General price range:

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RO Filter Housing Kit

RO filter housing kit typically includes:

Filter housing
Housing wrench
O-ring
Wall mount bracket
Screws
Connectors (including RO Tap Connector)

This kit is commonly used during:

New RO installation
Filter housing replacement
Upgrading domestic RO systems

RO filter housing kit ensures easy and quick replacement.

RO Filter Housing Replacement

Filter housings may need replacement due to:

Cracks
Leakage
Pressure damage
Thread wear
Discoloration
Odor buildup

Signs you need a replacement:

Frequent leakage
O-ring not sealing
Cartridge doesn’t fit properly
Housing becomes brittle

Replacement is simple and requires:

Unscrewing housing
Removing old unit
Installing new housing
Connecting pipes
Testing for leakage

RO Filter Housing Cost

RO filter housing cost varies by:

Size (10 inch, 20 inch, jumbo)
Material (PP, ABS, PC, SS)
Brand
Application

Domestic housing is cheap while industrial housing costs more due to higher build quality and pressure rating.

RO Filter Housing for Home

RO filter housing for home use includes:

10-inch pre-filter housing
Transparent housings
Wall mount pre-filter housing sets
Cartridge housings

These housings are used for:

Domestic RO systems
Under-sink RO
Kitchen water purification
Sediment filtration

Benefits:

Better flow
Improved water taste
Cleaner drinking water
Longer RO membrane life

Pre Filter Housing and Pre Filter Housing Set

Pre filter housing is an essential part of the water purifier, installed before the main RO unit.
Its purpose is:

To block dust
To trap sand
To remove sediments
To protect the RO membrane

A complete pre filter housing set includes:

10-inch housing
Spun filter
Wall bracket
Connectors
RO Tap Connector
Wrench

This set is easy to install and significantly improves RO performance.

Filter Housing Material Comparison

Filter housings are made from:

1. Polypropylene (PP)

2. ABS Plastic

3. Polycarbonate (transparent housings)

4. Stainless steel

5. FRP (for industrial units)

Comparison:

How to Choose the Best Filter Housing

Consider these factors:

Water TDS
Flow rate
Filter size
Cartridge type
Material
Pressure capacity
Housing transparency
Brand reliability

Also ensure compatibility with RO Tap Connector and piping dimensions.

Common Problems with Filter Housing

Leakage
Cracked body
Loose threads
Damaged O-rings
Sediment blockage
Airlock
Low flow

These can be prevented with timely maintenance and proper installation.

Maintenance Tips for Filter Housing

Clean housing every 3–6 months
Check for cracks
Replace O-rings regularly
Avoid over-tightening
Use correct wrenches
Flush before and after cartridge replacement
Ensure proper sealing

With proper care, filter housings last for years.

Conclusion

Filter housing is an essential part of any water purification system, from domestic RO purifiers to industrial water treatment plants. This guide covered filter housing types, sizes, 20-inch housings, cartridge housings, bag housings, transparent housings, RO filter housing price, pre-filter housing sets, HS code, installation, maintenance, and complete buying advice.