FloodStop 1/2" NPT Flood Protection System

For any 1/2" NPT faucet or water-using appliance connection

For a great way to protect your home from water damage, try a FloodStop system. These leak-sensing systems detect small amounts of water - before any real damage occurs - saving you money and the frustration of having to deal with the aftermath. Easily installed in under 15 minutes, the FloodStop is connected to the supply line, the sensor is placed at the base of the appliance being monitored, and it's ready to shut off the water and sound an alarm when a leak is detected - that's it! The valves stay closed until you reset the unit, reducing or eliminating the danger of additional water leakage.

FloodStop System for Multi-Purpose Applications

FloodStop (FS 1/2-NPT) Components:
  • One Motorized Ball Valve (1/2" NPT Fitting)
  • One Control Unit with Battery Backup and 30" cord to the valve
  • One Water/Leak Sensor with 7' cord
  • One Transformer: 120 Volt AC Input - 9 Volt DC Output with 6' cord
  • Power Option: Can use 4 each "AA" Batteries as Primary Power Source (batteries not included) - batteries should be installed for battery back-up when used with the 120 volt transformer
  • One 6" Output Contact Wire
  • Motorized ball valve rated 0-180 psi

Leaks happen, but that doesn't mean you want to ignore them. Even small leaks can cause damage to a cabinet or floor, and then seep between the flooring and sub-flooring. The FloodStop (FS 1/2-NPT) system is designed to automatically shut off the supply valve to any 1/2" NPT water valve you choose to monitor when a leak is detected. This system can easily be installed in 15 minutes and includes two output contact wires to allow the system to be connected to an auto-dialer, most home automation systems, or even your home alarm system to make you aware of the problem if you are out of town.

FS 1/2-NPT - FloodStop System - lead-free = $177.17

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Optional Accessories

image of flood stop extension wire

Model # Description Price & Quantity
FSAS Additional Sensors for FloodStop Systems
- Increases the area that is monitored for flooding
- Quicker detection of flooding which closes the valve sooner and helps reduce costly water damage
- Easy to connect, simply daisy chain as many sensors as you would like
- includes 1 meter (39.37") cord length
FSTEW Transformer Extension Wires for FS 1/2-NPT FloodStops (86" length) $7.50
FSC2VEW Controller to motorized ball valve extension wire - extends reach by 9 feet $28.99

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More Information About This FloodStop System

The FloodStop (FS 1/2-NPT) system is designed to automatically shut off the supply valve to any water valve you choose to monitor when a leak is detected, whether caused by a ruptured supply line, leaking water dispenser, water conditioner overflow, leaking water filter, dishwasher overflow, or other water supply failures and sounds an alarm.

Powered by AC Adaptor/Transformer (120 Volt AC Input - 9 Volt DC Output transformer with 30" cord) OR can be powered with 4 each "AA" Batteries as the primary power source if an electrical outlet is not readily available.

Once the problem has been repaired, simply wipe the sensors dry and press the green "open" button on the control unit to reset the system.

1-Year Manufacturer's Warranty.

Can be used anywhere requiring lead-free potable drinking water products.

FloodStop (FS 1/2-NPT) Components & Dimension:

  • One Motorized Ball Valve (1/2" NPT Fitting) - approx. 3-1/4"(L) x 3-1/4"(H) x 1-3/4"(W)
  • One Control Unit with Battery Backup and 30" cord - 4-3/4"(L) x 4-3/4"(H) x 1"(W)
  • One Water/Leak Sensor with 7 ft. wire cord - 7-1/2"(L) x 1-1/4"(W) x 1/8"(H)
  • One Transformer: 120 Volt AC Input - 9 Volt DC Output with 6' cord
  • Power Option: Can use 4 each "AA" Batteries as Primary Power Source (batteries not included) - batteries should be installed for battery back-up when used with the 120 volt transformer
  • One 6" Output Contact Wire

How FloodStop (FS 1/2-NPT) Works:

  1. The FloodStop valve is connected to the supply line feeding the desired appliance
  2. Water leak sensor is placed at the base of the fixture/appliance (any 1/2 inch appliance/application)
  3. Valve stays open until water loss is detected
  4. Water on sensor closes FloodStop valve and sounds alarm
  5. Valve stays closed until problem is attended to and system is reset

Always make sure that you take the precaution of following the regular maintenance and inspections (included in your FloodStop package) required to ensure that you are protected.

Note: FloodStops can help prevent flooding, but do not provide 100% guaranteed flood protection. We cannot be held liable for any damages that may occur when flood stops are installed. Always refer to the owner's manual and perform maintenance per the manufacturer's recommendations.

Related Items & Accessories

Frequently Asked Questions

Q. "How does it work?"
A. Simple! You'll install a FloodStop motorized ball valve(s) upstream of each supply line and place our water sensor on the floor behind the unit that needs detection. If water leaks due to a broken line or the failure of ANY internal component of your plumbing fixture, the control unit tells the motorized ball valve(s) to shut off the water and sound an alarm.

Q. "So these systems can help prevent leaks or flooding?"
A. They really can't help prevent leaks. They can help prevent flooding by shutting off the water if a leak happens.

Q. "If there is no electricity running to the valve (either because they haven't been hooked up or the sensor has touched water), are the valves normally open or closed?"
A. In their normal position, the FloodStop valves are open and will allow water to pass through; once water touches their sensor, the motorized ball valve is tripped and the valves are closed. The valve(s) will remain closed until the sensors are dried and the reset "Open" button is pressed. The Controller has a battery port for 4 each AA size batteries, which will serve as a battery backup in case of a power outage. These same batteries can serve as the primary power source if a nearby electrical outlet is not available (battery life 1 year).

Q. "Does the FloodStop system shut off water to the whole house?"
A. No, this is a point of use product; it only shuts the water off at the source of the leak. Why shut off the water to your whole house if the cause of the problem is just at the washing machine, for instance? Whole house systems are much more expensive and usually require a plumber to install.

Q. "What should I do after the system has detected a leak?"
A. If a leak has occurred, turn the manual valve(s) to the off position, investigate and repair/stop the leak, dry the sensor, and reset the controller by pressing the "Open" button.

Q. "Are FloodStop systems difficult to install?"
A. No, if you can install a garden hose, you can install FloodStop. Installation takes 5 to 10 minutes, and your home will be protected against many sources of water damage.

Q. "Why would I need to use the transformer extension wire?"
A. If the appliance or fixture you wish to protect isn't located next to an electrical outlet, you may need to use the approximate 7-foot-long (86") low-voltage extension wire.

Q. "Why would I need an additional sensor?"
A. You can increase your area of protection by adding extra sensors near the fixtures or appliances you have selected to protect. If you want more protection for your washing machine FloodStop valves you can add another sensor behind your dryer or laundry tray/sink or maybe a low spot on the floor where water tends to puddle. Or if the water heater FloodStop is purchased then additional sensors can also be placed in your water heater's drain pan, as well as on the floor nearby (in case a leak sprays outside the pan). Or if you want a quicker detection for your icemaker FloodStop, you may choose to install a sensor under your icemaker valve, another behind the refrigerator and a third near your icemaker's filter (if you have one).

Q. "What about braided hoses, aren't they burst proof?"
A. You should use braided hoses whenever you can (especially on your washing machine), and take every precaution to avoid water damage, but hoses are not the only source of flooding. And, braided hoses are not burst proof, but only burst resistant. There are a wide variety of clamps, valves, pumps, drains, etc. inside many fixtures that can fail. (FloodStop was designed after the inventor suffered a home flood due to a switch failure that did not tell his washing machine when to stop filling with water. Water continued to run into the washer and flooded the house for 3 hours before it was discovered).

Q. "I'm hearing a lot about lead-free these days. What does that have to do with plumbing products and how does the new lead-free legislation affect me?"
A. Basically, the laws implemented Jan. 1st, 2014 require plumbing products that come in contact with drinking water to be "essentially lead free" (less than 0.25% weighted average). For further information about how the law determines what is "lead free", rules regarding which plumbing products must be "lead free", and who these laws will affect, please view our page.

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