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20" x 4.5"
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Rain/Tank Water Twin Whole House Filter Combo | Washable Sediment + Coconut Carbon Block | 20" x 4.5" Big Blue Water Filter Cartridge Replacement Pack$187.50- This filter combo is ideal for use on Rain/Tank water*** in combination with UV sanitation.
- Pleased sediment filters can be washed and re-used - ideal for tanks!
- Select from your choice of carbon blocks specifically designed for tank water issues.
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Mains Water Max Chemical Reduction Chlorine/Chloramine Double Coconut Carbon | Twin 20" x 4.5" Big Blue Whole House Water Filter Cartridge Replacement Pack$248.50- This twin filter pack is ideal for mains water!
- Get the maximum level of chemical reduction with double carbon on your 20" x 4.5" Twin Whole-House System, since mains water typically doesn't have much sediment, and carbon blocks sediment anyway!
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Sediment + Coconut Carbon + Hard Water Scale/Heavy Metal Conditioning | Triple 20" x 4.5" Big Blue Whole House Water Filter Cartridge Replacement Pack (Suits GT1-108-OSP)$550.00- Replacement Pack Suit 3 Stage 20" x 4.5" Hard Water System GT1-108-OSP
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Sediment + Coconut Carbon | Twin 20" x 4.5" Big Blue Whole House Water Filter Cartridge Replacement Pack (Suits GT1-108-OSP)$145.00- 1 Year Replacement Pack to suit the GT1-108-OSP Whole House Filter System
