The average water leak causes $7000 in damage (source American Insurance Association) . Be notified of a water leak while it’s measured in drops. The Water Leak and Freeze Detector from Resideo detects water with sensors on base of unit or has expanded coverage with included 5 ft. water sensing cable. Additional cables CHWES41013 can be purchased to expand the sensing area. Entire cable detects water. YCHW4000W4004 is a 4-pack that includes 4 leak detectors, cables, batteries and mounting kits.