Berkefeld products by Doulton are manufactured in an EPA-registered establishment.

Ultra Sterasyl Filters are NSF Certified.

What is NSF Certification of  Water Filter Systems?
In the United States, NSF International (formerly the National Sanitation Foundation) works to protect consumers by providing third-party testing, written standards, and validation of products available to the public.

The table below is a visual to help consumers understand the gravity water filter space.

Understanding NSF 42, 53, and 372 Codes

  • NSF/ANSI 42 – Drinking Water Treatment Units – Aesthetic Effects
  • NSF/ANSI 53 – Drinking Water Treatment Units – Health Effects
  • NSF/ANSI/CAN 372 – Drinking Water System Components – Lead Content

British Berkefeld Ultra Sterasyl vs Alexapure® Pro

Company

Best Choice



British Berkefeld®

/ Doulton®


Alexapure®

Filters

British Berkefeld® Ultra Sterasyl

Alexapure® Pro

Manufacturer Country Of Origin

UK

USA

NSF/ANSI 42 Accreditation


Aesthetic Effects

NSF/ANSI 53 Accreditation


Health Affects

NSF/ANSI 372 Accreditation


Lead Content

NSF/ANSI 401 Accreditation


Emerging Compounds /

Incidental Contaminants

Pour Through NSF

Microplastics

Micro Biological Klebsiella

Micro Biological E-coli

Cyst

Chlorine Reduction

Heavy Metals Reduction

Lead Reduction

Glyphosate Reduction

Pesticide Reduction

Herbicide Reduction

Pharma Reduction

Chemical Reduction

Average Price Per Filter (Not Sets)

$34.99

$83