Opening And Joining Plug-In Couplings: Important:

Plug-in couplings are components that permit simple, fast and precise connection of pipelines.
These precision components must be handled carefully during repairs. Excess force during assembly work, damage to the sealing surface and soiling can cause leakage.
Perform preparations carefully when handling plug-in couplings - e.g. cleaning and fitting the plugs - as repairs are possible only by replacing the affected line in most cases.
After separating the plug and socket piece, carefully protect them against dirt and scratches with caps.
Join the plug-in connection only in a straight line. Never use excess force. Pull slightly to make sure the connection is locked properly.