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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Pentair Pentek RFC-20BB Big Blue Radial Flow Carbon Water Filter

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

🏠Fits all 20-inch Big Blue housings

💧100,000+ gallons filtration capacity

⚙️0.90 psi low pressure drop at 4 gpm

1251 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

Secure transaction

Description

💧 Elevate your home’s water game—taste the difference, feel the flow!

WHOLE HOME FRESHNESS - Eliminates chlorine taste & odor for fresher water at every tap
RADIAL FLOW INNOVATION - Advanced carbon design ensures smooth flow with minimal pressure loss
UNIVERSAL COMPATIBILITY - Seamlessly fits all 20-inch Big Blue and heavy-duty housings
LONG LASTING PERFORMANCE - Filters over 100,000 gallons—up to a year of reliable service
CERTIFIED QUALITY ASSURANCE - NSF/ANSI 42 certified for trusted, safe filtration

The Pentair Pentek RFC-20BB is a high-capacity, 20-inch radial flow carbon water filter cartridge designed for whole-house filtration. Utilizing granular activated carbon, it effectively reduces chlorine taste and odor across all taps with a low pressure drop of 0.90 psi at 4 gpm. Compatible with all 20-inch Big Blue housings, it delivers over 100,000 gallons of cleaner, better-tasting water—about a year of service—while meeting NSF/ANSI 42 certification standards for material safety and performance.

Specifications

ASIN	B003SRQG0U
Best Sellers Rank	#9,592 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #68 in Replacement Under-Sink Water Filters
Brand Name	Pentek
Customer Reviews	4.7 4.7 out of 5 stars (1,063)
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 Highlight	Granular Activated Carbon Reduces Chlorine Taste and Odor Whole-House; 20" x 4.5", 100,000-Gallon Capacity
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
Number of Packs	1
Product Benefits	Removes Odor
Set Name	Single Water Filter Cartridge
UPC	051678247433
Unit Count	1 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

1251 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews