Review on XtremepowerUS Adjustable Coupler Connector Adapter by Mike Wallace

Well made, all connections are tight and don't leak. The 'valve', which is actually a retractable Schrader valve pusher, allows for connection without line pressure and also allows for connector removal without line pressure. On the other hand, this is very useful. After the pressure medium has been withdrawn, the pipeline can be depressurized by opening the distribution valve and the connector can then be easily removed.