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The Bard 8300-010 circulating pump is an OEM replacement pump used in Bard domestic hot water desuperheater pump module applications, where it circulates water through the heat recovery circuit so reclaimed compressor discharge heat can be transferred into a storage tank. If a desuperheater module is not moving water, is noisy, or will not prime after proper air bleeding, replacing the pump with the correct Bard part number helps restore proper flow and stable heat recovery performance while maintaining original fit with the module’s tubing and controls. Verify your equipment model and desuperheater kit documentation to confirm compatibility with the GVDM-26 pump module kit before ordering.