When buying a angle valve, first look at the material. It is best to use copper material, copper material will be heavier, and the excellent material will greatly extend the service life of the product; although the zinc alloy on the market is relatively cheap, it is easy to break when used, and maintenance will be very uncomfortable; secondly, look at the valve core. Generally, ceramic spools are used. The spool is the heart of the product. It depends on it for tightness and service life, especially the sealing ring and ceramic sheet inside. But generally we can't see it, so we have to try the feel. The feel is too heavy, the switch is uncomfortable, the feel is too light, it will leak after a long time, and the soft feel will last longer. Finally, look at the electroplating gloss. Pay attention to the gloss, whether the product is blistered or scratched, the surface of a good product is smooth and shiny, and it is smooth and flawless to the touch.
