Valves are important plumbing components designed metal or PVC and used for regulating flow of liquids or gases in an industrial, commercial, or residential facility. They can be categorized into four main groups: 1) Ball valve
: These valves are designed with rotating spheres that have holes. The lever handle runs a valve that blocks or allows water to flow. The handle also acts as an indicator of whether the valve is closed or open.2) Gate valve
: This type of valve control water flow by raising or lowering a gate. The gate, in this case, is a piece of metal that moves up to allow water to flow through or down to stop the flow. 3) Check valve
: This valve is used for allowing water to move only in one direction. Good examples of valves in this category include a back-flow valve, ball-check valve, and stop-check valve. 4) PVC valves
: These are water control valves that are designed using PVC. They are preferred because PVC is corrosion-free. Most of them work well in low-pressure flows.