An email discussion suggested the Champion hose nozzle might, once upon a time, have had a washer between the conical and cylindrical sections.
So I made one:
The details:
- OD = ½ inch
- ID = 9/32 inch
- 2.5 mm stamp pad rubber
It sealed perfectly, but, just before shutting off, the washer vibrated in the water flow and gave off an ear-shattering (even to my deflicted hearing) howl.
Perhaps a stiffer and thinner washer with a slightly larger OD would work better.
A quick check of similar nozzles in the Box o’ Hydraulics shows none of them feel like they have a compliant washer in there, but any sufficiently old rubber will have long since fossilized.
This seems like a good job for a 3D printed washer with a conical face, made from slightly squishy TPU plastic to ease it past the nozzle’s internal threads. All I need is the ability to print TPU …
The Smell of Molten Projects in the Morning 