what is dzr in plumbing

What is DZR in Plumbing?

DZR is an acronym for “dezincification resistance” in plumbing. Brass is a copper-zinc alloy, but most plumbing fittings have too much zinc and not enough copper. Over time, brass loses its zinc content, becoming porous and brittle. It may also corrode. DZR valves are made of copper-rich brass. So, what are the advantages of DZR valves? what is dzr in plumbing

A dezincification-resistant valve must pass specific standards for lead-free plumbing. DZR brass must meet these standards, and building inspectors are trained to demand the removal of non-compliant brass. Brass has the same corrosion-affecting component as zinc, so the amount and types of additives are carefully controlled. A COBRA DZR brass, for instance, has a copper content of 62%. This brass meets stringent standards for impurity levels and additive quantities.

Dezincification resistance is a critical aspect of plumbing fitting quality. Brass will corrode more quickly in water with higher acidity or alkalinity than DZR brass. Fortunately, there is a solution to this problem. DZR brass is an alloy made to resist dezincification. This special alloy offers better strength, corrosion resistance, and oxidation resistance, while being NSF lead-free*. A unique heat-treatment process further improves the properties of DZR brass.

Dezincification resistant brass is made to prevent copper from corroding or leaching harmful substances. Brass is susceptible to dezincification when it is exposed to sulfur, carbon dioxide, and oxygen in water. Low-velocity or stagnant water promotes dezincification. Brass can be made to resist dezincification by adding arsenic, tin, or gunmetal. DZR brass is also sometimes referred to as corrosion-resistant brass.

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