One direction

Both directions

Any direction

None of the above

On the right side

On the left side

Under the seat

None of the above

Swing check valve

Globe valve

Gate valve - rising stem

Gate valve - non-rising stem

To get good fitting

To fill up the gap between the fitting

To avoid leakage

To get easy engagement and disengagement

Spindle bent

Spindle threads worn out

Defective washer

Valve on the spindle loose