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

Q: 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.

Q: 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

Q: 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.

Q: 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.

Product ID: 253575592

Secure Transaction

Details

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

⚡Low pressure drop radical flow

💧25 micron sediment reduction

🛡️NSF certified safety

Frequently Bought Together

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

Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20" x 4.5", 5 Micron, Pack of 1, White

Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)

Description

💧 Elevate your water game with pure, powerful filtration!

RADICAL FLOW TECH - Unique design minimizes pressure drop and carbon fines for smooth, pure flow.
CERTIFIED PEACE OF MIND - NSF International certified to guarantee water safety and quality.
CRYSTAL CLEAR HYDRATION - Reduces sediment & chlorine for fresher, cleaner water every sip.
LONG LASTING PERFORMANCE - Massive 100,000-gallon capacity—replace annually or when flow dips.
UNIVERSAL FIT ZERO HASSLE - Fits all 20" Pentair Pentek Big Blue & heavy-duty housings—easy swap, instant upgrade.

The Pentek 155247-43 RFC-20BB is a 20" x 4.5" granular activated carbon filter cartridge designed to reduce sediment and chlorine taste and odor, delivering clearer, better-tasting water. Featuring a unique radical flow design, it ensures low pressure drop and minimizes carbon fines release. Compatible with all 20" Pentair Pentek Big Blue and similar heavy-duty housings, it boasts NSF certification and a robust 100,000-gallon capacity for reliable, long-term whole-house filtration.

Specifications

Brand	Pentek
Model Number	155247-43
Color	White
Product Dimensions	11.43 x 11.43 x 50.8 cm; 1.13 kg
Material	Granular Activated Carbon
Compatible Models	155247, 175792, 155247-43, 56027-01, AP817, RFC20
Item Weight	1.13 Kilograms

Have a Question? See What Others Asked

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

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

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

Is this good enough for a spotless car wash filter?

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

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