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Introducing the DZR inch double regulating valve by Pegler Yorkshire. It features ISO 228 parallel threads for secure connections. A Double Regulating Valve (DRV) is a type of valve used in heating, ventilation, and air conditioning (HVAC) systems to control and balance the flow of fluids within a pipeline. It combines the functions of a balancing valve and a shut-off valve. This valve offers both regulation and isolation functions. Available in various sizes to suit your needs. Built from durable DZR material, it ensures long-lasting performance. Ideal for precise flow control and reliable isolation. Ideal for both commercial and residential applications. Choose the DZR double regulating valve for top-notch performance and reliability.. Pegler Yorkshire 1200 DZR SF Double Regulating Valve - 1/2 inch DZR Brass 126002