if the knob is in line with the pipe it is on. if it is perpendicular to the pipe it is off. if the knob is made like the one on a water spigot with no indicator then all the way out is on and all the way in is closed.
To determine if a pool valve is open or closed, check the position of the valve handle. Typically, a valve handle that is aligned with the pipe indicates it is open, while a handle that is perpendicular to the pipe signifies it is closed. Additionally, you can observe the flow of water; if water is flowing through the system, the valve is likely open. In contrast, if there is no flow or pressure, the valve may be closed.
The position of the handle indicates the direction of the opening through the ball, IE. handle in line with pipe, valve is open, tangent to pipe, valve is closed.
Need to replace diaphragm an piston under large chrome cap on top. Repair kit can be purchased at most any plumbing supply house, you will need to tell them if it is for a urinal or a water closet . Be sure to turn off water supply before repairing, screwdriver stop slot located under small cap on right or left of main valve
This can very greatly from computer to computer. You will have to open the case of your computer to tell.
You can tell a bad valve by doing a compression test.
no you cant
Modulating Valve ???? If you can tell me what system this valve would be in I can tell you the correct name for it and its location. example IPR valve in the high pressure oil system.
The intake valve is bigger.
Noisy valve train. Remove the valve cover and inspect the valve train.
The intake valve is bigger.
You tell me that is why I'm asking
You can tell if the fuel shut-off valve is tripped by checking for a lack of fuel flow to the engine or appliance it serves. If the engine won't start or runs erratically, it may indicate that the valve is closed. Additionally, many fuel shut-off valves have a visual indicator or a distinct position (open/closed) that can be checked manually. Listening for a click or observing a change in the valve's position can also confirm if it has been tripped.