I'm still playing with getting my new SWG adjusted and set, and no need for the below "yet", but while working on getting it dialed in it hit me that it would really be a pain once solar or a heater are added and be generating unknown amounts based on the weather each day. Or, I guess even right now when I get requests from company or the grandkid to turn the little cheap pressure waterfall on so pumps running in addition to the usual controlled window.
I searched and found other questions on it, but most ended with either saying it can't be done, or can be done with no details, or "use another relay" and no specifics.
So, correct me if I'm wrong here. Could I not cut the wire to the flow switch and run one leg of it through the Lights relay, then set the lights timer to only close the relay during normal pump runtime? The relay would otherwise show an open on the flow switch and prevent the SWG from running outside the normal window?