Aries AF-20-1042-BB 20″ x 4.5″ Chloramine Removal Filter

The Aries AF-20-1042-BB 20″ x 4.5″ chloramine removal filter is designed for chloramine and hydrogen sulfide reduction in compatible Big Blue or full-flow housings. It uses Calgon Centaur catalytic carbon to improve taste and odor in applications where standard carbon may not be sufficient, especially in city water treated with chloramines or in water with sulfur odor concerns.

Model number: AF-20-1042-BB

UPC: 705911267251

Gallon capacity: 8,750 gallons

Media type: Calgon Centaur catalytic carbon

Specifications of Cartridge Size and Housing Compatibility

• Product name: Aries 20-inch x 4.5-inch Chloramine Removal Filter
• Cartridge size: 20-inch x 4.5-inch standard
• Housing size compatibility: 20-inch x 4.5-inch Big Blue or full-flow housings
• Cartridge style: double-open-end cartridge
• Color: blue
• Country of origin: Made in the U.S.A.
• Application: chloramine and hydrogen sulfide reduction
• Case quantity: 2 (8 filters per case)
• NSF 42 Certified
• NSF 61 Certified
• NSF 372 Certified
• WQA Certified

*Use only if these certifications are shown on the product page and associated with this cartridge.

What is the Aries AF-20-1042-BB 20″ x 4.5″ Chloramine Removal Filter Used For?

• Chloramine reduction in city water applications
• Chlorine taste and odor improvement
• Hydrogen sulfide reduction for sulfur or rotten-egg odor concerns
• Point-of-entry or full-flow filtration, where a 20-inch x 4.5 inch housing is installed
• Residential and light commercial applications that need a catalytic carbon cartridge

Why catalytic carbon matters

Catalytic carbon is commonly used when the water problem is more difficult to treat than basic chlorine taste and odor. It is especially useful for chloramines and hydrogen sulfide because it is designed to support stronger contaminant reduction than standard activated carbon in the right application.

Compatibility checks

Before ordering, confirm:

• Your housing accepts 20-inch x 4.5-inch full-flow cartridges
• Your current cartridge or system documentation matches AF-20-1042-BB
• Your main goal is chloramine, chlorine taste and odor, or hydrogen sulfide reduction
• Your system has enough flow capacity for a Big Blue cartridge setup
• If you have heavy sediment, install sediment prefiltration before this cartridge to help extend cartridge life

What’s included

• (1) Aries AF-20-1042-BB catalytic carbon cartridge
  Cartridges sold individually. Case quantity: 2.

Install difficulty: Easy

Standard cartridge replacement in a compatible 20-inch x 4.5-inch housing.

Installation Guidance

1. Shut off water to the filter housing and relieve pressure.
2. Place a towel or pan under the housing to catch water.
3. Remove the sump with a housing wrench if needed.
4. Remove the old cartridge and clean the housing sump.
5. Inspect the O-ring and replace it if flattened, cracked, or damaged.
6. Insert the AF-20-1042-BB cartridge and confirm it is centered and seated properly.
7. Reinstall the sump and hand-tighten. Do not overtighten.
8. Turn the water on slowly and check for leaks.
9. Flush the cartridge until water runs clear and any carbon fines are cleared.
10. Recheck for leaks after a few minutes and again later the same day.

Replacement Triggers

Replace the cartridge when:

• Chloramine or chlorine taste and odor returns
• Sulfur or rotten-egg odor returns
• Flow drops noticeably
• Differential pressure increases across the housing, if monitored
• You reach the 8,750-gallon capacity or your planned maintenance interval

Maintenance Schedule

• Replace based on gallons used, water quality, and odor/taste return
• Inspect the housing O-ring during each cartridge change
• Use sediment prefiltration if your water has visible particulate or turbidity
• Keep a spare cartridge on hand if chloramine or odor reduction is critical

FAQS on the Aries AF-20-1042-BB 20″ x 4.5″ Chloramine Removal Filter

Q: What does the Aries AF-20-1042-BB reduce?
A: It is used for chloramine, chlorine taste and odor, and hydrogen sulfide reduction.

Q: What housing does this cartridge fit?
A: It fits compatible 20-inch x 4.5-inch Big Blue or full-flow housings.

Q: What is the capacity of the AF-20-1042-BB?
A: The listed capacity is 8,750 gallons.

Q: What is catalytic carbon?
A: Catalytic carbon is an enhanced carbon media commonly used for harder-to-treat taste, odor, chloramine, and hydrogen sulfide issues.

Q: Is this cartridge good for chloramine removal?
A: Yes. The product is designed for chloramine removal using catalytic carbon.

Q: Will this remove sulfur or rotten-egg odor?
A: It is used for hydrogen sulfide reduction, which is commonly associated with sulfur or rotten-egg odor.

Q: Is this a sediment filter?
A: No. It is a catalytic carbon cartridge. If you have sediment, use sediment prefiltration to help protect the carbon cartridge and maintain flow.

Q: How do I know when to replace it?
A: Replace it when taste or odor returns, flow drops, pressure drop increases, or the listed gallon capacity or service interval is reached.

Q: Is this cartridge made in the USA?
A: Yes. The product page lists it as Made in the USA.

Replace your 20-inch Big Blue cartridge with the Aries AF-20-1042-BB to target chloramine, chlorine taste and odor, and hydrogen sulfide with catalytic carbon filtration.