I'm also a big fan of YoLink water sensors. I installed them under every sink and have probes going into the sump pumps to detect high water levels. We have a

I'm also a big fan of YoLink water sensors. I installed them under every sink and have probes going into the sump pumps to detect high water levels. We have a single hub in the basement and it has no issues reaching sensors two floors up at the far corners of the home.