What is Reddit's opinion of Leviton GFNT2-W Self-Test SmartlockPro Slim GFCI Non-Tamper-Resistant Receptacle with LED Indicator, Wallplate Included, 20-Amp, White?

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> would what /u/lordfili suggested above work?

I don't believe so, because I think that timer requires 120v for operation.

> Would something like this work?

YEP! That's exactly what you need. I think I might order one myself. Sorry I didn't search for one before, I was on my phone and it was late.

https://imgur.com/7Ui76SH

So, the new wiring diagram would look something like that. Sorry, I don't have the right CAD program to make the wires look the same, so it might look weird, but that should basically be correct. I added new red circles where you would need wire nuts for the timer.

Disclaimer: I am not an electrician, and this comment does not suffice as a substitute for consulting an electrician. Electricity is dangerous. Consult a qualified electrician for all electrical work, especially around water.

Oh, you should also swap the outlet in that guide with a 20A GFCI outlet. It's cheap insurance and could save your life or your belongings in the case of an accident.