20" x 4.5" Whole House Water Filter Systems

Compare full-size 20-inch x 4.5-inch whole-house water filter systems by your household needs and filtration priorities. Explore standard multi-stage, PFAS-focused, fluoride-focused, combined fluoride and PFAS, and Aragon configurations.

Explore the system for your priorities

Standard filtration: view the Aquarius stainless-steel triple-stage system and its included cartridge configuration for sediment, chlorine-related taste and odour, and scale-control treatment.

PFAS-focused filtration: explore the Aquarius PFAS Stainless Steel system for its dedicated configuration and full product specifications.

Fluoride-focused filtration: compare the Aquarius Fluoride Triple system, with standard and stainless-steel-cover options.

Fluoride and PFAS: view the Aquarius Fluoride & PFAS Stainless Steel system when comparing configurations designed for both priorities.

Aragon filtration: the AquaCo Three Stage system combines sediment, carbon and Aragon filtration.

Whole-house filtration plus kitchen reverse osmosis

The RO20 Pack combines a whole-house filtration system with a separate Frizzlife PD600 kitchen reverse-osmosis system. Reverse-osmosis treatment is provided at the kitchen drinking-water outlet, not at every tap in the house.

More configurations and ongoing support

The Aquarius Twin system offers a two-stage option. You can also explore the established Aquarius Whole-Home Triple configuration.

Compare the included cartridges, flow and pressure specifications on each product page. Need help choosing? Contact Aquarius Water or call 03 9981 3588.

For servicing, shop 20-inch x 4.5-inch replacement filters. For the compact format, compare 10-inch x 4.5-inch whole-house systems.