Q: Garbage disposer and subpanel

[Terry Beck]

Q: what is common between a garbage disposer and an electrical sub panel?

A: Why its simple: they both share space under the kitchen sink!

[Jerry Peck]

Q: what is common between a garbage disposer and an electrical sub panel?

A: Why its simple: they both share space under the kitchen sink!

That's why the 'S' trap is there - to make sure the trap self-siphons dry and there is no water left to potentially leak out onto/into the panel. :D