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The flow/return valve is a key component in boiler and heating systems, regulating the direction and flow of water between the supply and return lines. This valve ensures proper circulation, maintaining efficient heat transfer and system balance. Commonly used in hydronic heating setups, it helps prevent backflow and supports temperature control. Durable construction allows it to withstand thermal expansion and pressure variations. Whether you are servicing a gas burner or upgrading a heating circuit, this valve is essential for reliable operation and energy efficiency.