Filter Cartridge Menu

This page contains many of the filter cartridges we stock. If what you need isn't here, please ask. We have access to all standard-sized cartridges as well as many unusual sizes.

Arrangement by Size

Our cartridges are arranged by size. Each size category in the Cartridge Menu below provides a link (click on the picture) to our full offerings in that size category. To repeat, they are arranged by size, not by purpose, style or color of vessel, or manufacturer.

Here's a picture to help with size comparison (click picture for larger view). The numbers represent inches. It features the most popular sizes that we offer. Keep in mind that sizes may vary slightly — especially the diameter. 4.25" can mean anything from 4 1/4" to 4 1/2". Sizes, especially the diameter, may vary slightly.

Go here for more information about Sediment Cartridges. Go here for a list & explanations of commonly used filter-maker jargon used in descriptions.

Go by size, not by shape. A water filter that accepts a 9.75 x 2.5 axial cartridge (the blue cartridge in the picture) will also accept a 9.75 x 2.5 radial cartridge.

You don't have to replace your filter cartridge with the exact cartridge that came in it when it was new. The great thing about having a standard-sized water filter is that you have many optional cartridges to select from.

Filter Cartridge Menu

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Standard-sized 9.75" X 2.5" cartridges.

This is the most common size made in water filter cartridges. It is essentially a drinking water size, though some discount store manufacturers use this size in inexpensive whole house filters. Virtually every cartridge manufacturer makes a few cartridges in this size.

At left is a carbon block. We also have axial flow cartridges (like the blue cartridge in the picture above), sediment (wound string, spun polypropylene, etc.) cartridges, ceramic cartridges, and cartridges with specialty media in this style.

Click the picture at left for our list of 9.75" x 2.5" Cartridges.

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Standard-sized 20" X 2.5" cartridges

This is a favorite size of makers of light-duty whole-house filters both for sediment and chemical removal.

Many cartridges in this category are sediment filters and carbon block filters, like the one pictured at right.

Click the picture at left for our list of 20" x 2.5" Cartridges.

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Standard-sized 9.75" X 4.25" cartridges.

This is the popular “Big Blue” size used mainly for free-flowing whole house filters. It's a popular size for wells.

Most cartridges in this category are carbon blocks and sediment cartridges.

Click the picture at left for our list of 9.75" x 4.25" Cartridges.

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Standard-sized 20" X 4.25" cartridges

This is the popular 20" or double “Big Blue” size used mainly for free-flowing whole house filters. It's a popular size for wells and for residential chlorine removal filters.

Most cartridges in this category are carbon blocks and sediment cartridges.

Click the picture at left for our list of 20" x 4.25" Cartridges.

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Candle or Slimline Filters
Threaded or Doulton Candle Style Cartridges

This is the standard threaded cartridge that fits Doulton filters and our own slimline countertop series. We call them “Candles,” as Doulton does, or simply Slimlines.

This category includes several grades of ceramics, carbon blocks, and even some sediment and specialty cartridges.

Click the picture at left for our list of Candle Style Cartridges.

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Microline & Hydrotech Cartridges

Specialty Cartridges for RO Units by Hydrotech & Microline

We now stock standard sediment and carbon cartridges for Hydrotech and Microline reverse osmosis units.

Click the picture at left for Microline & Hydrotech Cartridges.

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Q Series Cartridges

Omnipure’s Q Series. We stock a limited number, but can order you anything. We stock mainly 12" sediment and granular carbon models for reverse osmosis and for general filtration purposes, but we also have specialty units for lead removal, scale reduction, and deionization.

Click the picture at left for Q-Series Cartridges.

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Inline Filters

Many styles and formats of easy-to-install disposable Inlines. We stock open end 1/4" port style as well as the quick connect style.

Click the picture at left for Inline Cartridges.

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Reverse Osmosis Membranes

We stock a wide variety of membranes for standard membrane housings. Also, some specialty items like Hydrotech and Q Series membranes.

Click the picture at left for R.O. Membranes.

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