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The difference between open end and closed end tyre valve connectors – info supplied by PCL Air Technology

 

It is important when purchasing connectors to specify whether a closed or open-end type is required.

 

CO1A03 Tyre Valve Connector

CO1A03 Open end connector

CO1B03 Tyre Valve Connector
CO1B03 Closed end connector

 

What is an open-end connector?

An open-end connector has a pin which unseats the tyre’s valve when in use, this means that air will pass through the connector regardless if it is on a tyre valve or not. You should only use an open-end where you have control of your air output, for example with a handheld inflator or wall mounted pre-set version.

PCL’s hold-on and clip-on connectors can be distinguished as an open-end by the black rubber handle.


What is a closed-end connector?

PCL's closed end connector features a red rubber handle and is employed when air is supplied directly from a main air line, for example a compressor or air receiver. A non-return valve unseated on connection to the tyre’s valve, allowing air to flow into the tyre.

You should not use a closed-end version on a single hose, the only time you should use a closed end connection in conjunction with a tyre inflator is when using multiple hoses to inflate multiple tyres at once.