Description
The 20″ Big Blue Housing with 1″ Caps is a durable, high-capacity filter housing designed for whole-home water filtration systems. Built to accommodate 20″ filter cartridges, this robust unit delivers exceptional flow and protection for your plumbing, fixtures, and downstream treatment equipment. With standard 1″ inlet/outlet connections, it’s easy to install into most residential and light commercial water systems.
This housing is ideal for sediment pre-filtration, carbon filtration, and specialty media cartridges — providing cleaner, clearer water throughout your home.
Key Features
- Large 20″ Capacity — Holds standard 20″ cartridges for high flow and extended service life
- 1″ Connection Caps — NPT/standard 1″ ports make plumbing installation straightforward
- Durable Construction — Made from rugged polypropylene or reinforced plastic for long-lasting performance
- Pressure Rated — Built to handle typical residential water pressure
- Easy Cartridge Changes — Front-loading design simplifies maintenance
- Versatile Application — Compatible with a wide range of 20″ filters
What It’s Used For
This housing can be paired with virtually any 20″ filter cartridge, including:
- Sediment filters (5, 10, 20, 50 micron)
- Pleated filters (20 micron or finer)
- Activated carbon filters (GAC, CTO)
- Specialty media cartridges (iron, sulphur, manganese)
Filter cartridges are sold separately.
Specifications
- Housing Size: 20″ (standard Big Blue)
- Port Size: 1″ inlet/outlet (caps included)
- Material: Reinforced polypropylene or engineered plastic
- Max Pressure: Typical residential rating (check label or manual)
- Application: Whole-house or point-of-entry filtration
- Cartridge Compatibility: Standard 20″ filter cartridges
Applications
The 20″ Big Blue Housing with 1″ Caps is ideal for:
- Whole-house sediment filtration
- Pre-softener protection
- Pre-UV system protection
- Carbon filtration for taste & odor
- Well water systems
- Commercial or high-flow residential systems
It’s especially useful in homes with high sediment load or heavy water usage.
Why Choose Big Blue Housing?
✔ Higher Flow Capacity than standard 10″ housings
✔ Longer Filter Life thanks to larger cartridge sizing
✔ Easier Maintenance with front-loading design
✔ Versatile Filtration Options — from sediment to specialty media
✔ Reliable Whole-Home Protection for plumbing and appliances
Installation Tips
- Install upright and level near main water line
- Leave clearance below for cartridge replacement
- Use thread seal tape on all pipe threads
- Flush system after installation before everyday use
The 20″ Big Blue Housing with 1″ Caps is a dependable foundation for any whole-home water filtration system — giving you the flexibility to choose filtration cartridges that match your water quality needs.

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