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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Pentek - 155247-43 RFC-20BB Carbon Filter (20" x 4.5"), 25 Micron

Pentek - 155247-43 RFC-20BB Carbon Filter (20" x 4.5"), 25 Micron

Product ID: 253575592

Details

Brand
Pentek
External testing certification
NSF ANSI
Item weight
1.13 kg
Material
Granular
Product benefits
Reduces

💧25 Micron filtration precision

🔄Radial Flow design for low pressure drop

🛡️NSF certified for trusted safety

VT86758

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Description

💧 Elevate your water game with every drop—because your home deserves the best!

CERTIFIED PEACE OF MIND - NSF International certified, ensuring your water meets the highest safety and quality standards.
CRYSTAL CLEAR HYDRATION - Reduces sediment, chlorine taste & odor for pure, refreshing water every time.
RADICAL FLOW INNOVATION - Unique radial flow design minimizes pressure drop and carbon fines for smooth, clean water flow.
LONG LASTING PERFORMANCE - Impressive 100,000-gallon capacity means you replace less and enjoy more—up to 1 year of premium filtration.
UNIVERSAL FIT ZERO HASSLE - Fits all 20" Pentair Pentek Big Blue and other heavy-duty housings—easy swap, no stress.

The Pentek 155247-43 RFC-20BB is a 20" x 4.5" granular activated carbon filter cartridge designed for whole-house filtration. Featuring a 25-micron filtration rating and a unique radial flow design, it reduces chlorine taste, odor, and sediment while maintaining low pressure drop. NSF certified and boasting a 100,000-gallon capacity, this filter fits all standard 20" heavy-duty housings, delivering cleaner, better-tasting water for up to one year.

Specifications

ASIN	B003SRQG0U
Best Sellers Rank	#189,669 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #627 in Replacement Water Filters
Brand	Pentek
Brand Name	Pentek
Customer Reviews	4.6 out of 5 stars 724 Reviews
External Testing Certification	NSF, ANSI
External testing certification	NSF, ANSI
Global Trade Identification Number	00051678247433
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
Item weight	2.5 Pounds
Manufacturer	Pentair Industries
Manufacturer Part Number	155247-43
Material	Granular Activated Carbon
Material Type	Granular Activated Carbon
Model Number	RFC20-BB
Number of Items	1
Product Benefits	Reduces Chlorine
Product benefits	Reduces Chlorine
UPC	051678247433
Unit Count	1.0 Count

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VT86758

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In stock

Sold byAmazon VanuatuDelivered 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 Vanuatu.

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