While cleaning my Alto, I noticed there is OPEN-CLOSE (marked) valved on CNG cylinder near in-lets/outlets pipes. I assumed it should stop gas flow from cylinder to CNG kit when positioned to CLOSE state. But I noticed that CNG pressure on gauge,installed under bonnet, did not changed even I rotated valve in either direction ( OPEN/CLOSE position)
Does this valved functions same or it is some thing else? Should it not close gas flow from cylinder to CNG kit?
Waiting for valuable comments!