What does the NSF/ANSI Standard 61, Annex G mean?
This standard was developed to reduce the amount of lead products used in materials, components, products or systems that come into contact with drinking water or drinking water treatment chemicals. The exact verbiage (as stated on www.nsf.org) of Annex G states that “This annex was developed to establish a lead content evaluation procedure for use when product is required to meet a <= 0.25% weighted average lead content requirement as exists in California and Vermont effective January 1st, 2010.”
Click to read the the full requirements of NSF/ANSI 61: http://www.nsf.org/business/mechanical_plumbing/annexg.asp?program=MechanicalPluSysCom.
Effective July 1, 2012, the chemical extraction requirements of NSF/ANSI 61 will be tightened considerably
- The measurement of lead that leaches from samples collected by NSF (and other accredited certifiers) will be reduced by an average factor of three.
- Products currently qualifying for NSF/ANSI 61 certification will be tested for lead extraction limits of 5 parts-per-billion instead of the previous 15 ppb.
- The new, tightened standard is detailed within the recently-created Annex F of NSF/ANSI 61.
What is currently regarded as NSF/ANSI 61, Annex G will be identified as NSF/ANSI 372 and measure lead content only
- Manufacturers who produce prodct destined for many USA municipalities and government-operated building plumbing systems will need to maintain certification to NSF/ANSI 372 and NSF/ANSI 61.
Click to read the entire Annex G: http://nsf.org/business/water_distribution/pdf/AnnexG.pdf