FloodStop FS3/4NPT Automatic Shut-off for Water Heater - 3/4" NPT Fittings

FloodStop FS3/4NPT Automatic Shut-off for Water Heater - 3/4" NPT Fittings

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FloodStop FS3/4NPT Automatic Shut-off for Water Heater - 3/4" NPT Fittings


The FloodStop (FS 3/4-NPT) kit automatically shuts off the water supply to the Water Heater and sounds an alarm, leaving all other household fixtures and appliances operational.Powered by AC adapter/Transformer and 4 AA Batteries as a battery backup in case of a power outage, or the batteries may serve as the sole power source if there’s no nearby electrical outlet to utilize the transformer. The controller will beep to alert you of low or no batteries.One output contact (normally open) available, which allow the Controller to connect with Alarm, Home Automation or Auto-Dialer systems if desired. Easily installed in fifteen minutes. 1-Year Manufacturer's Warranty.


Additional Sensors can be added by wiring one sensor to another in a chain format. There is no max # of sensors; however you will want to use a larger gauge (20AWG or larger) if splicing more than 50 feet to the furthest sensor.


How Does It Work?:

  • The FloodStop valve is installed between the Water Heater and its manual shutoff valve.
  • Water/leak sensor is placed at the base of the Water Heater
  • Valve stays open until water loss is detected
  • Water on sensor closes FloodStop valve and sounds alarm
  • Valve stays closed until problem is attended to and system is reset


  • UL listed class 2 wall adaptor, 115AC/9VDC
  • UPC listed Full‐Port Motorized Ball Valve: CNC machined.
  • Motor operates at 6VDC.
  • Signal Output: 1 Normally Open, 24 Volt / 2 amp rated
  • Motorized Ball Valve: CNC machined with MIP X FIP.
  • Rated 0‐180 PSI. Max 250 PSI. Solid brass. AB1953, UPC, CUPC, NSF61 cert.
  • Rated 32‐212 degrees F
  • Sensor: 1.25 X 7.5 inch, double sided. Additional sensors may be added in series.
  • Alarm: Beeping with Mute button.
  • Wire Lengths : valve to control box approx. 2 1/2', valve to sensor approx 7', power supply 5 1/2'

Whats in the Box?:

  • Motorized Full-Port Ball Valve (3/4 inch NPT pipe threaded)
  • Control Unit
  • Water/Leak Sensor (1.25” X 7.5”)
  • AC/DC Power Adaptor (or use 4 X AA Batteries as Primary Power Source, not included)
  • Output Contact Wires (2)


Spec Sheet Spec Sheet
Installation Sheet Installation Instructions

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SDS Supply Corp.
13731 S. Route 30, Unit 105
Plainfield, IL 60544
Call us: (800) 236-9029

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