NSF 61 O-Rings

NSF 61 O-ring & Seal Materials:

The National Sanitation Foundation (NSF), not to be confused with FDA or 3A, ensures the safety of products involved in the treatment and distribution of water. NSF 61 (also referred to as NSF/ANSI Standard 61) restricts certain substances from breaching into drinking water at any point in the production process.

What is FDA, 3A, & NSF?

FDA Information NSF 51 Food & Beverage Information

NSF 61 Ethylene Propylene (EPDM) Compounds:

Brand	Compound Number	Hardness (Shore A)	Low Temp	High Temp	Color
Parker	E1583-70 (63017)	70 +- 5	--	--	Black
Parker	E1561-60 (63446)	60 +- 5	--	--	Black
Parker	E1549-70 (63447)	70 +- 5	--	--	Black
Parker	E1570-70	70 +- 5	--	--	Black
Parker	E1571-70	70 +- 5	--	--	Black
Parker	E1244-70	70 +- 5	--	--	Black
Parker	E1257-70	70 +- 5	--	--	Black
Parker	E3609-70	70 +- 5	--	--	Black
Parker	EJ151-80 (3958)	80 +- 5	--	--	Black
Freudenberg	60 EPDM 290	60 +- 5	--	--	Black
Freudenberg	70 EPDM 291	70 +- 5	--	--	Black
Freudenberg	85 EPDM 292	85 +- 5	--	--	Black