Delta Dryden 3551
I found the install instructions. The instructions say once the fitting snaps together pull on it to insure it's set properly.
For disassembly I remove the outer clips and pull to separate from the tube but it seems like there is another step required to separate the fitting.
Thank you for your question. To remove the quick connect hose assembly, simply squeeze the lower half of the two black/gray plastic clips together. The top halves of the clips will then open up, like a claw. Next pull down on the hose assembly to remove it.
Date published: 2017-01-09