My outside hose pressure relief valve leaks when the water is on. It comes out near the top of the valve where it connects to the facet.
I have been unable to remove it, the set screw is shot after 18 years, I can turn it about 3/4 of a turn and that is it.
Any secrets for a quick fix without having to replace the facet.
Best Answer
The anti-siphon valves I installed on my outside faucets are brass and one could drill multiple holes in the brass around the set screw to weaken it, then tear out the screw.