Primaplus compression fittings are a premium brass fitting, manufactured in Britain. Primaplus compression fittings can be used for a variety of installations including water and gas. Made in Britain to EN 1254 standard, and fully WRAS approved, you can be sure of a perfect fit each time. PrimaPlus fittings are also kite marked, ensuring that they are to the highest British standard, setting them apart from others manufacturers. Kite marked approval BS Standard. WRAS approved for use with drinking water. Manufactured to EN 1254 standard."