DZR BRASS Dezincification of brass is a critical aspect of the fitness for purpose (quality) of plumbers fitting that is in contact with water. The risk and rate of dezincification increases with water hardness and the acidity or alkalinity of water away from a PH of 7. Dezincification is the name given to the corrosion of brass. Dezincification resistant brass, or DZR brass, (something designed CR or DR) is the name given to brass that has exceptional resistance to this corrosion. The resistance is imparted by the adherence to SABS specifications for chemical composition and careful process controls. In order to be called DZR brass each batch must pass an ISO 6509 dezincification resistance laboratory test. In South Africa the use of DZR brass for components of brass plumber’s fittings that are in contact with water is national law. Building inspectors are being trained to demand the removal of plumber’s brassware that does not conform to statutory law.