After buying this crimped he was tried and worked flawlessly. In its nature, it may be only part of a range of connectors that should be kept in the motorhome.
A sliced Fahrradschlauch to garden hose flange (the most universal part), and a cone-shaped rubber grommet (apparently only available in French and Irish Camping supplies stores) are mandatory for me. These two are more universally applicable but you have to stick to the water bunkers there and they hold. When water thief this is not necessary.