Yep we finally got to make use of the water sensor when our water heater gave way. You can find the list on the forum. Just search for Glad for ST - saved me $$$
As of what I’m using, I’ve found the Utilitech water sensor (everspring) extremely reliable and with an awesome battery life. However do note that there is a bad manufacturing batch of Utilitech sensors out there. Here are the details. Just avoid this batch.
The other sensor I’m using a repurposed Monoprice door sensor. There was a thread on the forum which gave me an idea and the basic instructions on how to repurpose it as water leak sensor. Just open the sensor and add 2 wires to the external contact screws and then “stick” the bare wires to the lower side of the sensor. However it requires a custom DH to work as a water leak sensor in ST. If anyone is interested I can post the code and instructions.
It has been working brilliantly and is vey sensitive to any water presence. (In fact so sensitive that if your finger touched both the terminals simultaneously it would set it off).