Ultima 4.5 x 20 in. Big Blue Dual-Gradient Sediment Filter
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A longer dual-gradient sediment cartridge for 4.5 x 20 in. Big Blue housings, giving higher dirt-holding capacity for whole-house sediment control.
- Dual-gradient polypropylene melt-blown media (a coarser and finer micron rating combined in one cartridge)
- Available in 25/1, 50/05, and 75/25 micron gradient ratings
- Fits standard 4.5 x 20 in. Big Blue housings
- 6 in a case; sold individually here unless noted
Please note: this is the official OEM replacement for your Ultima system, sold under the same part number. Depending on what Ultima has in stock, the filter may ship with a different brand label.
Not sure which size fits your home? Send us a message with your household size and water source and we'll size it for you.
Water Solutions Online is an independent Ultima dealer. Ultima is a trademark of its owner.