The PM fittings is manufactured in acetal copolymer with food grade nitrile 'O' rings. Being especially produced for foodstuff and potable liquids, they are equally suitable for air and inert gases and can therefore be used on N2/CO2 (installed in accordance with the Brewers and Licensed Retailers Association code of practice) mixed gas dispense lines and pneumatic applications and vacuum. Accepted by almost all the world's beer and beverage producers and by the manufacturers of drinks dispense equipment, John Guest products have quality and performance approvals from leading testing and acceptance authorities. All these fittings are produced in Food and Drug Administration (FDA) compliant materials and are therefore recommended for food quality applications. NSF 14, NSF 51, NSF 61 approved. ISO 9001 and WRAS approved.