20” Twin Whole House Rainwater Filtration (Medium/Large Home)

20" Twin Big Blue Filter System Bundle – Specially Designed for Rainwater

This 20" Twin Big Blue Filter System is built for high-capacity rainwater filtration, delivering a powerful two-stage process that targets the common contaminants found in roof-collected water. Ideal for rural homes, lifestyle blocks, and off-grid properties, this system improves clarity and safety in tank water supplies.

What’s Included in the Bundle

1x 20" Twin Big Blue Jumbo Heavy Duty Filter Housing
1x 20" Polypleated 20 Micron Filter Cartridge
1x 20" Polyspun 1 Micron Filter Cartridge
Mounting bracket, spanner wrench, and four bolts

Product Description

Constructed from food-grade polypropylene, this dual-housing system is compatible with standard 20" x 4.5" cartridges. The first stage features a washable 20 micron pleated cartridge that captures large particles, sediment, colour, and organic debris without sacrificing flow rate. The second stage is a 1 micron polyspun filter that traps finer contaminants and assists in reducing protozoa like Giardia—making it a perfect pre-filter for UV disinfection setups.

With brass-threaded ports and pressure relief valves on each cap, this system is engineered for reliable operation in high-flow rainwater systems.

Key Features

Two-stage system using 20" x 4.5" jumbo filters
20 micron pleated pre-filter removes sediment and organics
1 micron polyspun filter helps reduce Giardia and other fine contaminants
Food-grade polypropylene construction
Brass-threaded ports with pressure relief valves
Temperature rating: 2°C to 37°C
Maximum working pressure: 125 psi
Includes mounting bracket, bolts, and spanner wrench

Why You Should Buy

Engineered for high-flow tank-fed rainwater systems
Removes both large particles and finer cysts like Giardia
Washable pre-filter reduces maintenance costs
Protects plumbing, appliances, and health
Ideal as a pre-treatment before UV sterilisation systems

FAQs

Q: What is this system best used for?
A: Filtering roof-collected rainwater in homes, rural properties, and off-grid systems.

Q: Is the 20 micron filter reusable?
A: Yes – the pleated cartridge can be washed and reused to extend its life.

Q: Do I need a UV system too?
A: Yes – for full protection from microbiological contaminants, use this system as a pre-filter before a UV steriliser.

Q: What’s included in the box?
A: The twin housing, 20 micron pleated and 1 micron polyspun filters, a mounting bracket, four bolts, and a spanner.

Q: Can this handle high flow rates?
A: Absolutely – it’s built for larger systems and higher water usage scenarios.