We are hijacking the thread, but ya, (not ) looking forward to playing plumber this weekend installing the shut off valve that arrived yesterday.
Making up for hijacking
The new Iris ( most) are just standard Centralite and will work with ST. The advantage of the plug we are talking about is that it is a zigbee switch with a built in Z-Wave extender. So you get double the bang for your buck. There were some Lowe’s stores that had them on clearance for < $15 and we bought out the stock.