The Pentair 074451 heat exchanger without heads is a replacement component designed for 250,000 BTU MiniMax and MiniMax Plus pool and spa heaters. This heat exchanger transfers heat from the burner assembly to the water circulating through the heater, enabling efficient water heating. Supplied as the tube bundle without headers, it is engineered for proper fit and performance in compatible Pentair heater systems.

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Key Features

• Replacement heat exchanger designed for compatible Pentair MiniMax and MiniMax Plus 250K BTU pool and spa heaters.
• Transfers heat generated by the burner assembly into the circulating pool water for efficient heating performance.
• Supplied as the tube bundle without headers, allowing reuse of existing header assemblies during repair.
• Precision-engineered tube bundle includes nine staggered heat transfer tubes for effective thermal exchange.
• Durable construction designed to withstand high operating temperatures and continuous heater operation.
• Ideal replacement component during heater service when the original heat exchanger becomes corroded or damaged.

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Product Overview

The Pentair 074451 heat exchanger without heads is a critical component used in 250K BTU MiniMax and MiniMax Plus pool and spa heaters. The exchanger functions as the heater’s primary heat transfer device, allowing heat produced by the burner assembly to pass into the water circulating through the heater system.

This assembly consists of a tube bundle with multiple staggered heat transfer tubes designed to maximize thermal efficiency while maintaining proper water flow through the heater. The unit is supplied without header plates, allowing technicians to reuse existing heater headers during installation. Replacing a worn or damaged heat exchanger restores efficient heat transfer and helps maintain reliable heating performance in compatible Pentair heater systems.