20″ Big Blue Water Filter Housing – Single O Ring
R637.56
20″ Big Blue and Big Black Heavy Duty Filter Housings offer the versatility to meet all of your large-capacity filtration needs, including high-flow and heavy-sediment applications. The extra-large housing allows for greater cartridge capacity, reducing the number of vessels required for high flow-rate applications.
Out of stock
20″ Big Blue Water Filter Housing – Taiwan (Single O-Ring)
The 20″ Big Blue Water Filter Housing – Taiwan is a durable, high-capacity housing designed for residential, commercial, and pre-RO filtration systems. Additionally, it features a single O-ring for reliable sealing, ensuring leak-free performance. It accommodates standard 20″ × 4.5″ filter cartridges, making it ideal for sediment removal, carbon filtration, or whole-house water treatment. Moreover, its Taiwan-manufactured construction guarantees long-term stability even in demanding water conditions.
Key Features
- Single O-Ring Seal: Ensures a tight, leak-free connection while allowing easy maintenance.
- Fits 20″ × 4.5″ Cartridges: Accepts sediment, carbon block, CTO, GAC, and specialty filters.
- High-Capacity Housing: Perfect for whole-house and high-flow filtration setups.
- Taiwan Quality Build: Strong polypropylene body designed for durability and pressure stability.
- Easy Servicing: Compatible with standard Big Blue wrenches, brackets, and cartridges. In addition, replacement cartridges are widely available.
Technical Specifications
- Housing Type: 20″ Big Blue (single O-ring)
- Cartridge Size: 20″ × 4.5″
- Material: Heavy-duty polypropylene
- Port Size: Typically 1″ (confirm your model)
- Operating Pressure: Up to approx. 6 bar
- Temperature Range: ~4°C – 38°C
Benefits for Your Filtration System
This Taiwan-made Big Blue housing provides large filtration capacity and improved water flow, making it suitable for borehole systems, municipal water polishing, or pre-filtration for reverse osmosis. Furthermore, the single O-ring design ensures easy sealing without over-tightening. Consequently, it reduces leaks and maintenance hassles, while the large internal diameter allows high flow with minimal pressure drop.
Installation & Maintenance Tips
- Mount vertically with enough clearance to remove the sump during cartridge replacement.
- Always depressurise the system before opening the housing.
- Additionally, lubricate the O-ring with food-grade silicone before re-installing.
- Replace filters based on water quality (typically every 6–12 months).
- Finally, check for leaks after re-pressurising the system.


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