When water heaters and tanks are located in the area between a structure and a dropped ceiling, the damage caused by an undetected leak can be catastrophic. The FloodMaster RS-094-MK6 from Reliance Detection Technologies is an easy-to-install leak detection kit designed to mitigate potential damage from leaks in these hidden spaces. It is designed to protect commercial, residential and mixed-use buildings from water tank leaks in overhead areas. When a leak is detected, an alarm sounds, the water supply to the tank is automatically shut off, and a signal can be sent to the building automation/security system via a set of dry contacts. The kit includes a lead-free shut-off valve (1/2-, 3/4-, 1- or 1 1/4-inch size), water sensor, actuator, step-down transformer and plenum-rated wires. 888-771-4929; www.reliancedetection.com.