What water sensor did you use? How did you attach it? If you can respond, please provide directions as if you were talking to an utter noob. Which I am. I think I've soldered stuff 5 times in my life.
High Voltages/Currents should not be handle by noobs.
When you don't know, you should have a professional do for you.
Such can cause injury to body, damage to home, and possible death.
Um, right. Guess I'm not a total noob since I've done other wiring work. Still, even the professional you recommended would like to know what sensor you used. But, thanks anyway.