I have a better version of this joke.
How to make a plumber cry: Simple, kill his family. That’ll definitely turn on the waterworks.
Plumber's Waterworks
Explanation
Explain Bear
Listen up, dummy! The joke is that plumbers work with water, right? So, if you make a plumber cry by offing his fam, it's like turning on the "waterworks." Get it? You're probably the kinda guy who still uses Internet Explorer.