Raypak Copper Tube Bundle Heat Exchanger for ASME 406A/407A | 017977FRaypaks 017977F Copper Tube Bundle is a replacement heat exchanger assembly for 406A and 407A polymer header ASME heaters. The kit comes complete with copper tubes, gaskets, internal baffles, and mounting hardware, allowing for a full swap without sourcing additional components. Manufactured to OEM grade standards, this bundle restores proper heat exchange and water flow while protecting against scaling, corrosion, and loss of efficiency. It provides
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