This kit includes the standard RS-094 valve (3/4″ valve size only), receiver and sensor, plus a step-down transformer (120, 208 or 240V AC to 24V AC) and plenum-rated wires to the sensor and transformer. Ideal for tanks located in the space between the structural ceiling and the dropped ceiling, where the scale of the damage from an undetected leak can be even greater. UPC #857640005724.FloodMaster RS-094 Water Heater Leak Alarm and Automatic Shut-Off Systems are ideal for minimizing water damage when water heater/water tank failures occur, automatically shutting off the water supply to the tank when a leak is detected. Standard RS-094 kits include a full-port, lead-free valve; receiver box; (1) wired sensor puck; and power plug. Modified kits are also available for specific application conditions, including low-profile tanks, plenum spaces and installations requiring an electrical plug or gas flow interrupter.