The setup is basically a whole in the tube that has a hose connection supplying water to a compartment that has a vertical up and down jet. When I did the repair a couple years, I removed all the existing. Drilled a 1/4” hole in the casing. Used a small plastic bulkhead that had the 1/4” tube insert into it. The tube to bulkhead connection is what’s failing.
Do the make brass bulkheads?