A solder ring fitting, also known by the trademarked name Yorkshire fitting, is a pre-soldered capillary connector for joining copper pipes used in plumbing.The Yorkshire suite of integral solder ring capillary fittings has the solid reputation of an established product range and suits a broad spectrum of applications in the domestic, commercial and industrial sectors. A wide range of fittings are available at BES from 6mm to 54mm. You can buy fittings individually or go for our value 200 pack.