Product review (1 stars): These are NOT comparable due to the fact that these ...
Stay away NO NSF 53 Certification!  These are NOT 'comparable' due to the fact that these Tier1 filters only conform to NSF 42, and do not also filter for NSF 53 which the LG OEM filters (manufactured by 3M) DO filter!  Buyer beware, false advertising calling these 'comparable'!

Read:
http://www.nsf.org/services/by-industry/water-wastewater/residential-water-treatment/residential-drinking-water-treatment-standards/

"NSF/ANSI 42: Drinking Water Treatment Units - Aesthetic Effects

NSF/ANSI 42 establishes the minimum requirements for the certification of POU/POE filtration systems designed to reduce specific aesthetic or non-health-related contaminants (chlorine, taste, odor and particulates) that may be present in public or private drinking water.

The scope of NSF/ANSI 42 includes material safety, structural integrity and aesthetic, non-health-related contaminant reduction performance claims. The most common technology addressed by this standard is carbon filtration.

NSF/ANSI 53: Drinking Water Treatment Units - Health Effects

NSF/ANSI 53 establishes the minimum requirements for the certification of POU/POE filtration systems designed to reduce specific health-related contaminants, such as Cryptosporidium, Giardia, lead, volatile organic chemicals (VOCs) and MTBE (methyl tertiary-butyl ether), that may be present in public or private drinking water.

The scope of NSF/ANSI 53 includes material safety, structural integrity and health-related contaminant reduction performance claims. The most common technology addressed by this standard is carbon filtration."