1. Iron material
Iron angle valves are cheap, easy to rust, easy to wear ceramic sheets, and cause water pipe blockage. Therefore, when purchasing angle valves, try not to choose iron angle valves, but some merchants will use iron angle valves to pretend to be copper angle valves. , when we distinguish, we can see whether the surface is rough, whether there are granular protrusions, if there is, it means that it is an iron angle valve
2. Alloy material
The alloy angle valve is slightly more expensive than the iron. This alloy angle valve is not easy to rust. The zinc alloy angle valve will automatically oxidize after entering the pipeline. It will be broken in the pipeline and not easy to remove. It needs a chisel and a hammer to remove it. Down. In addition, looking in from the water inlet along the light, there are small dots on the wall.
3. Brass material
Copper angle valve can be said to be such a good angle valve, it is not easy to oxidize, not easy to rust, and has a long service life, but the price is relatively expensive. This copper angle valve is yellow or yellow when viewed from the water inlet along the light. Yellow-white, very smooth inside.