Checking the valve

Check the valve in the following order:

- unscrew the valve cap;

- apply liquid to the valve so that it fills the valve cavity;

– when a bubble forms, tighten the valve spool with the back of the cap;

- check the valve again in the specified way, if bubbles continue to form and if it is impossible to tighten the spool, replace the valve;

- screw the cap onto the valve.