NSF/ANSI 58 Reverse osmosis systems incorporate a process that uses reverse pressure to force water through a semi-permeable membrane. Most reverse osmosis systems incorporate one or more additional filters on either side of the membrane. These systems reduce contaminants that are regulated by Health Canada and EPA.
NSF/ANSI 42 Filters are certified to reduce aesthetic impurities such as chlorine and taste/odor. These can be point-of-use (under the sink, water pitcher, etc.) or point-of-entry (whole house) treatment systems.
NSF/ANSI 372 This standard establishes a standardized methodology for the determination and verification of product compliance with a maximum weighted average lead content requirement of 0.25 percent as required by the U.S. Safe Drinking Water Act. Currently eight states reported requirements for compliance with NSF/ANSI 372 and two additional states have regulations or legislation requiring certification or conformance to a 0.25 percent weighted average lead content for products conveying or dispensing drinking water.
NSF/ANSI 401 Treatment systems for emerging contaminants include both point-of-use and point-of-entry systems that have been verified to reduce one or more of 15 emerging contaminants from drinking water. These emerging contaminants can be pharmaceuticals or chemicals not yet regulated by the EPA or Health Canada.
CSA B483.1 This Standard was developed in response to a request to specify plumbing, mechanical, requirements for drinking water treatment components and complete systems.
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