Plenum-Rated Water Leak Alarm with 2" Automatic Water Main Shutoff Valve

SKU: RS-080-2-MK6

The FloodMaster RS-080-MK6 makes it easy to detect and automatically shut down plumbing leaks in plenum spaces before extensive damage occurs. This kit is great for plenums, ceiling installations and other hard-wired applications, and it is easily expandable for multiple points of leak detection within a single room, floor, etc. It includes these commercial-grade components:

  • 1 – Receiver box
  • 1 – 2" full port lead-free shut-off valve and actuator assembly
  • 1 – Magnetized water sensor with 8' lead wire
  • 1 – Metal plate for sensor placement
  • 1 – Step-down transformer (120, 208, 240V AC to 24V AC), mounting plate and all plenum-rated wires (8' sensor and 12' power)
  • Automatically shuts off the main water supply line when a leak is detected – supports additional sensors for wider areas of leak detection
  • Includes everything you need for plenum spaces and other hard-wired installs, including a step-down transformer and plenum-rated wires
  • Compact, magnetized leak detection sensor features a 1/16” stand-off to allow for air circulation and eliminate false alarms caused by humidity from the floor
  • Sensor can be installed securely horizontally or vertically on the included metal plate
  • Audible alarm sounds when a leak is detected
  • System is reusable, with an easy reset button
  • Rigid, reliable automatic shut-off valve
  • Tie into an existing security panel or BMS

RDT recommends that installations be completed by a licensed plumber to ensure that all local code requirements are followed.




  • NSF/ANSI 61 and 372 approved valve – meets U.S. EPA Safe Drinking Water Standards
  • MA Board of Registration of Plumbers Approval Code # P3-0818-66

You are currently viewing the RS-080-2-MK6 kit, which features a step-down transformer for hard-wired installation and 2" automatic shut-off valve.

Standard Base Kit Configurations:

3/4", 1", 1-1/4", 1-1/2" and 2" valve sizes are available to order online. Contact us for 2-1/2", 3" and 4" valves.

ModelSensorPowerSecurity Tie-InRecommended for
RS-080-xStandardWall plugYesLocalized protection
RS-080-x-MK6StandardHard wiredYesPlenum space / ceiling installations