I have 12 LeakSmart sensors all over the house. bathrooms (near toilet AND in vanity), laundry room, crawlspace, AC condenser pan overflow. They all are connected to SmartThings and Alexa. I also have 4 LeakSmart electric ball valves (brass). main water in, pressure release (bleeds off all pressure in system in 3 seconds of alarm), and hot and cold lines, in the crawlspace, going to an outdoor shower at the spa. If a drop of water is detected by ANY sensor, the main closes, the pressure release valve opens, alarm siren sounds, a text is sent to mobile devices. If the text is not answered in two minutes a voice call is placed and email sent. Tested every 3 months with an eye dropper over a sensor. Also had an actual when the maid put a wet (dripping) wash cloth on the towel rack over a sensor. This system senses, corrects the water flow, then notifies us. all within 5 seconds. maximum leakage, less than a tea cup. Works when we are on the road or at home. About $1200 for peace of mind. (Ray)