You can also get a 120v click for projects like this.
Looks good
Thanks! I looked at at the 120V version, but I already had the 18-2 CL3 speaker wire on hand for all the field wiring, and running everything as as low voltage control made it easy.
I used Functional Devices' RIBs (Relay In a Box) to control the valve and pump.
-rpoet