20 x 4.5 Big Blue Carbon Water Filters
Shop 20 x 4.5-inch carbon filter cartridges for 20-inch heavy-duty / Big Blue-style housings at All Filters. This category includes several carbon-media designs, including carbon block, granular activated carbon, radial-flow carbon and carbon-impregnated media, with different models intended for different filtration goals and operating conditions. Confirm the housing size and exact replacement model first, then compare media type and verified product specifications. Use the individual product page and supporting documentation for contaminant-reduction claims, certifications, micron rating, flow or pressure-drop data, application and replacement guidance.
10-Inch vs 20-Inch Big Blue
Big Blue-style housings are commonly sold in both 10-inch and 20-inch lengths. A 20-inch cartridge is not interchangeable with a 10-inch cartridge simply because both are approximately 4.5 inches in diameter. If your housing uses the shorter format, shop the 10 x 4.5 carbon filter page instead.
Size |
Rating |
SpiroPure |
Pentek |
Hydronix |
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Carbon Block Series |
4.5" x 20" |
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CC1 Series |
4.5" x 20" |
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GAC Series |
4.5" x 20" |
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RFC Series |
4.5" x 20" |
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C1 Series |
4.5" x 20" |
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NCP Series |
4.5" x 20" |
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Choose by Carbon Media
Not sure what carbon media family matches your filtration needs? Learn more about carbon block, GAC, radial-flow, catalytic carbon, and carbon-impregnated dual-purpose media.
- Carbon Block: Dense bonded block media used in selected cartridges. Specific chlorine, cyst, sediment, or other contaminant-reduction claims vary by model; verify individual product specifications.
- Granular Activated Carbon (GAC): Loose granular carbon used in selected cartridges for product-specific taste, odor, and chlorine-reduction applications. Always verify exact claims and application compatibility on the product page.
- Radial-Flow Carbon: A distinct flow-path design used in selected models to optimize flow and reduce pressure drop. Compare exact flow and pressure-drop specifications rather than assuming all radial-flow cartridges offer the same performance.
- Catalytic Carbon: Specialized carbon media used in targeted cartridges. Do not assume chloramine or other advanced reduction performance without checking the specific product page for verified claims.
- Carbon-Impregnated Dual-Purpose Media: Pleated or cellulose/polyester media that combine particulate sediment filtration with carbon treatment in a single cartridge. Exact micron ratings, flow rates, and reduction capabilities are model-specific.
Compatible 20 x 4.5 Water Filter Cartridges
Use our cross-reference chart to find the right carbon filter for your specific system. Start by finding the make and model number of your current filter in the chart, then check across the row to find compatible SpiroPure replacements. If your model number isn’t available, you can also search by filter size and micron ratings, and compare specifications to find the right filter. Here are some of the uses of each series:
- Carbon Block Series: Designed for fast and efficient removal of contaminants, Carbon Block Series 4.5 x 20 carbon block filters are ideal for drinking or cooking water, such as in restaurants or home countertop or under-sink systems.
- CC1 Series: CC1 Series 20 x 4.5 water filter cartridges can be ideal for uses like whole-house water systems, aquariums, and commercial kitchens.
- GAC Series: Made with coconut shell filter material, GAC Series filters are often used in commercial kitchens, whole-house, under-sink, and countertop systems.
- RFC Series: RFC carbon filters are commonly used in commercial kitchens, restaurants, and whole-house water systems, as they provide effective chlorine, taste, and odor reduction.
- C1 Series and NCP Series: Designed for long-lasting chemical and odor reduction, C1 and NCP Series filters are used in whole-house systems, commercial kitchens, reverse osmosis (RO) pre-filtration, and light industrial applications.
Shop 20 x 4.5 Big Blue-style sediment filters to find pre-filtration and whole-house water filter applications.
Order 20 x 4.5 Water Filter Cartridges
Upgrade your water filtration system with carbon block filters from All Filters. Enjoy friendly and reliable customer service on live chat, email, or phone 7 days a week. Orders over $99 and most Super Value deals come with free shipping. Order 4.5 x 20 carbon block filters online today and enjoy high-quality filters at affordable prices.
