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The return pipe boiler DHW is a plumbing component that carries cooler water back from the domestic hot water (DHW) system to the boiler for reheating. This pipe is typically made of durable materials to withstand temperature fluctuations and pressure. Over time, return pipes can develop leaks or blockages due to scale buildup or corrosion. Replacing a faulty return pipe boiler DHW ensures proper water circulation and maintains the efficiency of your hot water supply. It is a common spare part for many boiler models with integrated DHW systems.