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Alert System Type
Water / Leak
Sensor Type
Water Leak / Flood
Auto-Shut Off
Battery Operated
Relay Output Support
Ease of Installation
Intermediate (Installs < 60 minutes)
Onsite Pro
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Water Heater Shutoff Valve Prevents Leaks From Damaging Your Home
Water Heater Auto-Shutoff, 3/4" Compression
FloodStop 3/4C Water Heater Auto-Shutoff, 3/4 Inch Compression Valve
FloodStop 3/4C Water Heater Auto-Shutoff, 3/4 Inch Compression Valve
Item# 7115H2C
Price: Normally $180.00 
Hot Deal $157.95
Free shipping on orders over $175 - See Details


  • Shuts off water immediately upon detecting the presence of water
  • Audible alarm alerts you to the detection of a leak
  • 3/4-inch compression fittings provide a secure attachment
  • Two output contact wires make is easy to integrate with INSTEON

Essential Info

Stop flood damage before it really starts with the Water Heater Auto-Shutoff valve, which automatically turns off the water supply to your water heater seconds after the leak starts, thus preventing any serious damage to your most prized possession, your home. Since you won't always be around the moment a leak begins, the Water Heater Auto-Shutoff valve protects your home, shutting off the water and emitting an audible alert when its sensor detects the presence of water. Incorporate the Flood Stop into your INSTEON or X10 network - the control unit has two output contact wires and plugs with 6" leads.

What's Included

  • Control unit
  • Valve assembly
  • Power supply
  • Velcro strips
  • Mounting hardware
  • Sensor
  • 4-pin connector
  • Instructions
  • More Info

    The Water Heater Auto-Shutoff connects to your heater through 3/4-inch compression fittings, which provide a secure attachment for added peace of mind. The system's water sensor is placed under the water heater to detect any leak immediately and signal for an immediate response. Automatic ball valve responds, eliminating the water supply when your leak is detected. The valve can also be opened and closed manually.

    The Water Heater Auto-Shutoff is so easy to install, it can take as little as 10 minutes. Connect the valve on the cold water supply side, mount the control unit to your wall, and place the water sensor on the floor. Plug in the valve assembly, and it's ready to connect to the AC/DC power supply. Four AA batteries can be installed in the control unit as backup power; the batteries are sold separately. If your water heater isn't right near an electrical outlet, a 9-foot extension cable for the sensor is available and sold separately.

    The Water Heater Auto-Shutoff valve is also available without compression fittings.



    Manufacturer:OnSite Pro
    Manufacturer Product No.:FS3/4C
    Dimensions:Sensor: 1.25" x 7.5"; control unit: 5" x 3.5" x 1.5"; valve assembly: 3.5" x 4" x 1.75"
    Power:AC/DC and 4 AA batteries for backup power, or can be powered with batteries only
    PSI Rating:Rated 0-180 psi, Max. 250 psi
    Materials:Lead-Free brass
    Alarm:Beeping with mute button
    Valve:Full-Port Motorized Ball Valve
    Connection:3/4" compression
    Approvals:UL listed
    Warranty:1 year, limited

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
    Manufacturer contact information: AQUA MANAGERS, Tel: (949) 362-2959


    13 Ratings
    5 star: 69%  (9)
    4 star: 15%  (2)
    3 star: 0%  (0)
    2 star: 0%  (0)
    1 star: 15%  (2)
    Average Customer Rating
    (13 customer ratings)
    Share your thoughts with other customers
    carter -- new jersey, United States   12/19/2013
    Leak detector help to find where the problem of my plumbing contractor as me to bring that one for the safety of next time problem. Its quiet good to have such kind of parts.
    RAY -- chelsea, MI   10/31/2013
    Very quickly installed. Tested and worked
    Glenn -- truckee, CA   4/17/2012
    I have had this unit installed in my vacation condo for about 8 years. My unit is on the second floor and I also wanted to be able to turn off all water going to the unit. I had a contractor install the valve in the crawl space, I extended the wires and then mounted the controller in the water heater closet with the sensor under the water heater. I now have both protection for water heater leakage and an easy way to turn off the water to my unit. Product has been reliable and passes my once a year test.
    CHEUNG -- brooklyn, NY   2/22/2011
    I think the product is excellent. It could potentially save me from a flooding disaster. However, I think the installation guide could use a little more detail. Also, I think the brass compression ring is a little bit to hard, copper rings may be better. I had a hard time getting a tight fit with the compression rings. Eventually, I had to wrap some teflon tapes around the rings to stop it from leaking. Once the valve is installed, I tested the motor operations and I found it worked fine. Overall, I am happy with the product. Thanks.
    SANFORD -- colorado springs, CO   7/8/2009
    It installed extremely well and appears to be working just as advertised. Very pleased.
    RAN -- canton, CT   6/6/2009
    The Device is easy to install and performs the task correctly
    VINCENT -- staten island, NY   4/24/2009
    This unit is terrific. I have installed many of them. The one on this particlar order had a problem with the gear on the motor that drives the closing of the valve but Smarthome supported the product and replaced it. Great to do business with. Product still highly recommended!!!
    CHARLES -- abington, MA   3/21/2008
    The installation was very easy. Of coure this is one of those products that you hope you will never need. But it gives great peace of mind knowing you have it.
    VINCENT -- staten island, NY   7/19/2007
    Performed as it should
    STEPHEN -- baltimore, MD   5/23/2007
    Very easy to install. I hope I never have a situation where I need the value to close, but it is a comfort knowing it is there.
    ANN -- hiltonhead, SC   2/8/2006
    Items shipped direct to my plumber. He was impressed with the product.


    Extra Sensors for Shutoff Kit       
    Extra Sensors for Shutoff Kit       

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