Product review (1 stars): DO NOT BUY UNLESS NSF CLAIMS ARE VERIFIED
Water Quality Association (WQA) lists RFC0500A UNDER NSF42:
"This component is certified for Materials Safety and Structural Integrity only, but has been tested for Aesthetic Chlorine reduction up to 1500 gallons at 1 gpm."  This seems to be a PARTIAL CERTIFICATION TO NSF42.

NO NSF53 CERTIFICATION LISTED WITH WQA!

THIS APPEARS TO CONFLICT WITH WEBSITE CLAIMS RE NSF CERTIFICATION.