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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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Stop Water Heater Leaks From Becoming a Disaster!
Onsite Pro FS3/4NPT Water Heater Shutoff, 3/4 Inch Valve
Onsite Pro FS3/4NPT Water Heater Shutoff, 3/4 Inch Valve
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Setup Diagram
Onsite Pro FS3/4NPT Water Heater Shutoff, 3/4 Inch Valve
Item# 7115H2
Price: Normally $170.00 
Hot Deal $146.95
Free shipping on orders over $50 - See Details


  • Prevent avoidable water damage to your home
  • Automatically shuts-off water if leak is detected
  • Installs in minutes - no professional plumber is needed
  • Two output contact wires make is easy to integrate with INSTEON

Essential Info

Don't risk subjecting your floors, carpets and other personal belongings to costly and ruinous water damage when it can be avoided before it begins. Prevent flood damage and avoid costly repairs with the easy-to-install Water Heater Auto-Shutoff Valve. This system not only detects leaks early, but it automatically shuts your water off in the event of a leak, alerting you with the control panel's alarm. 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

  • Shut-off valve
  • Water sensor
  • FloodStop control unit
  • 2x - Output Contact Wire
  • Wall adaptor and mounting screws
  • More Info

    Designed for both residential and commercial dwellings, the Water Heater Auto-Shutoff Valve uses a 3/4-inch full port motorized ball valve powered by an AC/DC adaptor (or 4 AA batteries) to shut off the water supply whenever your water heater leaks. The non-intrusive devices can be installed in as little as 10 minutes; no professional plumbers are required.

    This kit includes everything you need to protect your property from costly water-leak damage: a valve installed on your cold water inlet, a water sensor to be placed on the floor, and the control unit, which is mounted to your wall with the included screws. The Water Heater Auto-Shutoff Valve can be installed using two adjustable wrenches in minutes, although some older homes' valves might be soldered to the pipes, which would require professional installation.

    If your water heater should begin to leak, the controller tells the water valves to close and alerts you with an 87db alarm.

    This shutoff valve is made for 3/4" valves. A water heater shutoff valve is also available for 1/2", 1" and 1-1/4" valves, each sold separately.



    Manufacturer:OnSite Pro
    Manufacturer Product No.:FS3/4NPT
    Dimensions:Sensor: 1.25" x 7.5" double-sided; 3/4" pipe thread fitting
    Alarm:Beeping with mute button
    Materials:Lead-Free brass
    PSI Rating:Rated 0-180 psi; Max. 250 psi
    Power:AC/DC and 4 AA batteries for backup power, or can be powered with batteries only
    ValveFull-Port Motorized Ball Valve
    ComplianceUL-listed class 2 wall adapter

    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


    Setup Diagram       
    Setup Diagram       


    75 Ratings
    5 star: 60%  (45)
    4 star: 20%  (15)
    3 star: 8%  (6)
    2 star: 1%  (1)
    1 star: 11%  (8)
    Average Customer Rating
    (75 customer ratings)
    Share your thoughts with other customers
    MATTHEW -- hamburg, NY   2/24/2014
    The first one I received had faulty servo. Smarthome was great in sending me a replacement. Product works great, but worried that in the future, servo may fail rendering unit useless. I always test when leaving home for more than a day
    John K. -- golden,CO   3/25/2013
    This is a great product--I wish that the sensor wires were a bit longer but overall, a well-designed device!
    Tre -- honolulu, Hi   1/11/2013
    Onsite has some good products that work as advertised. I use this particular valve for my fish tank display tank is inside and filtration tanks are outside to prevent pumping a hundred gallons of water in the house if the tank has a leak. I have called the Onsite team a couple of times trying to figure out the best way do to things with their products and they have been helpful and friendly overtime. And to top it off I had a problem with one of my valves and they immediately replace it. Really recommend this company.
    LAURENCE -- chandler, AZ   6/5/2012
    I tested the device before and after installation and it has performed perfectly. The sensor did have an oily film (or had oxidized) which reduced conductivity but was easily wiped clean with a damp paper towel. After installing batteries, I found the clamshell case difficult to allign in order to close properly. If the unit is mounted on a wall, the one half of the clamshell case containing the circuit board and the connections to the sensor and valve, dangles from short thin wires that connect it to the half that houses the batteries. This requires that caution be taken to avoid breakage of those wires especially when mounting.
    DAVID -- kailua kona, HI   5/7/2012
    This is a device that you hope never has to do anything. Installation was fairly straightforward, and the valve closes when the sensor gets wet. It does provide peace of mind if a leak ever occurs.
    GREG -- annapolis, MD   3/18/2012
    just installed this device for my old water heater, and it works perfectly and at the right price. Received quickly and no need to call for info as it was easy to set up with good instructions. A very good value that allows me to sleep at night and not worry about my basement flooding.
    THOMAS -- saint john, IN   3/8/2012
    Was very easy to install,instructions very easy too understand.tested the sensor and it worked just like it should.
    WILLIAM -- bradyville, TN   2/19/2012
    Item shipped quickly and arrived as described. Very flexible installment options.
    MIKE -- des moines, IA   2/12/2012
    Tom P -- Texas   2/12/2012
    Ordered two of these. One worked, the other did not. I suspect their quality control is not very good, after reading other reviews.
    TOM -- dripping springs, TX   1/28/2012
    The product seems very well constructed for the price. A good deal.
    Bob from Utah -- Salt Lake City   8/30/2011
    I’m on my third one. The first two failed within 6 months. Failure discovered when I tested the unit to make sure it was working. It was not. Third one same thing. You don’t find out it does not work until you come home and find a flooded basement. Poor design. Too much torque on the drive to work as it is supposed to. Gear fracture on all three units. I’m a retired Mechanical Engineer. I am now making my own control using a brass solenoid valve. It’s scary to think I was depending on this product to prevent a huge loss and it does not do the job.
    LYNN -- niantic, CT   8/29/2011
    Works perfectly. Nice to have the back-up battery as part of the unit since we are now without power due to Hurricane Irene.
    GEORGE -- palm beach, FL   8/25/2011
    Very well, although I found one one inch valve so far as I am installing them on all heaters in a condo. I will send it back for replacement with a 3/4 inch
    CHRISTINE -- san antonio, TX   7/7/2011
    Plumber was very happy with your product. Easy to install and maintain.
    BOB -- manahawkin, NJ   5/17/2011
    the h20 hot water value was installed in 15 minutes, now i will not worry about the hot water heater leaking and destroying my hardwood floors in my walk in closet. or my bath room floors or my insulation under my house. This happened to my next door neighbor.
    ARTHUR -- thousand oaks, CA   4/21/2011
    Waiting on the backorder was tedious. The product works as expected, and I would recommend that all water heaters have the sensor installed.
    WILLIAM -- suffolk, VA   4/7/2011
    Good product. I am refering my customers to it.
    JEFFERY L -- juction city, OR   4/3/2011
    My order was just two water heater shut offs. The sales girl was great.My order was shipped super fast. I am already a repeat customer, and have recommended your products to others. Thanks, Jeff
    KEVIN -- wake forest, NC   1/30/2011
    1/30/2011 Installed a few days ago. Dampened the sensor and the valve closed properly. Working fine. The hinged plastic controller housing was thin and needs a little care to snap closed after screwing the rear half to the wall or after opening to replace batteries.


    Extra Sensors for Shutoff Kit  9ft Transformer Extension Cable     
    Extra Sensors for Shutoff Kit  9ft Transformer Extension Cable     

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