20" x 4.5" OptimH2O® Whole House Pre-filter Cartridge Replacement Filter

This pre-filter prevents dirt, sand, silt, rust and other sediment particles as small as 1 micron from entering the main OptimH2O whole house filter. Large 20" x 4.5" size and gradient density design help prevent clogging and water pressure loss. This pre-filter should be replaced every 6 months depending on water quality and sediment levels.

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  • MSRP: 35.28

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This sediment pre-filter replacement cartridge prevents dirt, sand, silt, rust and other sediment particles from entering the main OptimH2O Whole House Water Filter. The large 20" x 4.5" size and gradient density design help prevent clogging and water pressure loss.

This pre-filter should be replaced every 6 months depending on water quality and sediment levels. Change when color darkens or water flow slows. Download replacement instructions here.

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User Q & A

Is this 100237258?

Asked by: Niiwhole house

What’s the difference between this pre-filter and 4 pack one that’s a lot less expensive? Are they both for the whole house filter and one is better than the other or are they for different types of systems?

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