There are two types of tire valve connector. It is therefore important to specify whether a closed or open end type is required.
Closed End – used when air is supplied directly from a main air line (i.e. compressor or air receiver). A non-return valve unseats on connection to the tire’s valve allowing air to flow into the tire.
Open End – used with PCL MK3 tire inflators, ACCURA tire inflators and portable gauges. This connector has a pin which unseats the tire’s valve when in use.