First, the valve core must be a combination of high-density ceramic and a copper valve body. Don't just look at the advertising claims; check the test reports for the opening and closing lifespan and resistance to thermal shock. These core components determine whether you'll be woken up by leaks in the middle of the night for the next five years.
Second, all concealed components must support maintenance without breaking the wall. Pay special attention to whether the mixing valve can be pulled out as a whole, whether the decorative cover has a magnetic quick-release mechanism, and whether the inlet has an anti-rotation positioning groove. These details determine whether the repair cost is a few hundred or several thousand dollars.
Third, the water flow experience must withstand frequent daily testing. For example, does the showerhead have a self-cleaning silicone nozzle? Does the overhead shower have air injection? Does the handheld shower support multi-angle hovering? No matter how beautiful the appearance, if the water flow is harsh, the water jet is scattered, or the switch is clunky, it's all for show.
