As the core component for heat distribution and water return, it comes in two material options: brass and stainless steel. The brass model is integrally forged from HPb59-1, featuring a wall thickness of 3.3mm, a design that minimizes water resistance, compatibility with electric actuators, excellent cost-effectiveness, and suitability for wall-mounted boiler systems. The stainless steel model boasts a self-healing surface oxide film, exceptional corrosion resistance, high mechanical strength, ultra-low leaching, and requires virtually no maintenance. It is especially recommended for regions with hard water, dual-supply systems, or applications demanding exceptional durability.