PrimaPlus Solder Ring fittings are a premium copper fitting with integrated solder. No need to add additional solder when installing, saving time. PrimaPlus Solder Ring can be used for a variety of installations including water and gas. Manufactured from copper 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 other manufacturers. Kite marked approval BS Standard. WRAS approved for use with drinking water. Manufactured to EN 1254 standard.