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.

Save money and get free shipping with Water for Life, our no contract, no obligation auto-ship filter replacement program. Call 866-662-6885 to speak with a water expert and sign up today.

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User Q & A

Where are the whole house prefilters located? How do I replace/install?

Asked by: Joshua Tree Health
Good Morning, Thank you for reaching out to us. I have provided a link down below for the OPTIMH2O® WHOLE HOUSE PRE-FILTER instructions. https://cdn.aquasana.com/assets/EQ-PRE25_replace.pdf?_ga=2.81523991.1419123629.1599572644-773233525.1590676156 If you have any further questions please contact us at 866-662-6885. Thank you, Customer Support
Answered by: Aquasana S
Date published: 2020-09-08

Can these be used instead of the regular 20 inch pre filters?

Asked by: RJD47

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?

Asked by: No nicknames
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