In what way is this filter diffrrent (better?) than the gac-20bb? for whole house chlorine removal before a water softener.

These are both carbon filters, and will fit the same housings, the main difference is how they are constructed, which affects the performance. RFC20-BB filters offer a radial flow design which greatly reduces the pressure drop (RFC20-BB is rated at 0.9 psi pressure drop at 4 gpm, while the GAC-20BB you are comparing to is rated at 10 psi pressure drop @ 4gpm). The RFC20-BB filters also have a higher filtration capacity. RFC20-BB are rated at >100,000 gallons of chlorine taste and odor reduction at 4gpm, while the GAC-20BB are rated at 25,000 gallons.

Would this work with other 20 x 4.5 filter systems, like a replacement for an american plumber wrc25hd20?

RandyYes this filter will work in other systems that take 4"x 20" filter

This filter is 1/2 " longer then the old one will it still work?

This filter is designed to fit into the 10 inch Big Blue filter housings which is similar in size to most other 10 inch heavy duty filter housings. We have not made changes to the length of these cartridges, so if you had this model previously, it should still fit correctly. Not knowing what specific housing you have, I cannot for certain tell if this cartridge will fit. If you would like further details, please reach out to our technical support team (USA based) at 800-279-9404.

Is this good enough for a spotless car wash filter?

The RFC can be used as pretreatment for equipment that actually provides spotless rinse. This filter in itself does not provide spotless rinse.

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Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Activated Carbon (GAC) Filter, 20" x 4.5", 25 Micron

Product ID: 11468779

Details

External Testing Certification
NSF ANSI
Item Weight
2.5 Pounds
Material
Granular
Product Benefits
Removes Odor
Product Dimensions
4.5"D x 4.5"W

💧100,000 gallon capacity

⚙️Radial flow tech for low pressure drop

🛠️Fits standard 20" Big Blue housings

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Description

💧 Elevate your water game—because your home deserves the best sip!

EFFORTLESS FLOW - Radial flow design keeps water pressure high while filtering deeply
WHOLE HOME PURITY - Eliminates chlorine taste & odor for fresher water everywhere
CERTIFIED PEACE OF MIND - NSF/ANSI 42 certified for safety and structural integrity
LONG LASTING PERFORMANCE - Filters up to 100,000 gallons—up to a year of clean water
PLUG PLAY COMPATIBILITY - Seamlessly fits most 20" Big Blue filter housings for easy upgrades

The Pentair Pentek RFC-20BB is a 20-inch whole house carbon water filter cartridge featuring advanced radial flow technology and granular activated carbon. It effectively reduces chlorine taste, odor, sediment, and contaminants while maintaining water pressure. With a 100,000 gallon capacity, it provides up to one year of filtration and fits standard 20" Big Blue housings. Certified to NSF/ANSI Standard 42, it ensures safe, reliable, and long-lasting water purification for your entire home.

Specifications

ASIN	B003SRQG0U
Best Sellers Rank	#10,590 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #76 in Replacement Under-Sink Water Filters
Brand Name	Pentek
Customer Reviews	4.6 4.6 out of 5 stars (1,051)
EU Spare Part Availability Duration	1 Years
External Testing Certification	NSF, ANSI
Global Trade Identification Number	00051678247433
Item Dimensions D x W x H	4.5"D x 4.5"W x 20"H
Item Type Name	20-Inch, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Activated Carbon (GAC) Filter, 20" x 4.5", 25 Micron
Item Weight	2.5 Pounds
Manufacturer	Pentair Industries
Manufacturer Part Number	155247-43
Material Type	Granular Activated Carbon
Model Number	RFC20-BB
Number of Items	1
Product Benefits	Removes Odor
Set Name	Single Water Filter Cartridge
UPC	051678247433
Unit Count	1.0 Count

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₨4058

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In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

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