The different types of valves used in a water supply system with their functions are given. Identify the one which is NOT correctly matched.
1
Air Valve: To release the accumulated air
2
Scour Valve: To remove slit in a pipe line and drain the pipe for repair work.
3
Sluice Valve: To control the flow of water through pipe lines.
4
Check valve: To check Water flow in all directions.