FloodStop 1-1/4" Flood Protection System

For commercial water heaters, filters, and other 1-1/4" NPT connections


Many commercial water heaters, air conditioners, and filtration systems are only checked on scheduled maintenance days, meaning many leaks can go undetected for weeks - even months - until the next time they're checked for problems, and that is plenty of time for a small leak to cause big damage. FloodStop Systems for Commercial Water Heaters, Conditioners, and Filters can help prevent costly damage by shutting off the water to the unit that's leaking and prevents damage from getting to the point of major repairs or construction.

FloodStop for Commercial Water Heaters, Conditioners, & Filters

FloodStop system for Commercial use
FloodStop #FS 125NPT Components and Specifications:
  • One Motorized Ball Valve: Full port 1-1/4" Female NPT inlet, 1-1/4" Male NPT outlet
  • One Control Unit with Battery Backup and 30" cord to the valve
  • One Water/Leak Sensor with 7' cord
  • One 120 Volt AC Transformer: plugs into 120v electrical receptacle and converts to 9 Volt DC Control Unit with 6' cord
  • Power Option: Can use 4 each "AA" Batteries as Primary Power Source (batteries not included) and batteries should be installed for battery back-up when used with the 120 volt transformer
  • One 6" Output Contact Wire

Some leaks start small and go unnoticed until significant water damage is finally discovered. Such a leak can continue to collect and then seep between flooring and sub-flooring. The damage often goes unnoticed until the floor is visually buckled or warped, and by that time the damage and cost to replace can be extensive. You can help prevent water damage from failed appliances such as water softeners and commercial water heaters simply and easily by installing the FloodStop FS 125NPT. Easily installed within 15 minutes this system is designed to detect water, automatically shut off the water valve to the water softener (or water heater or other appliance) and sound an alarm to alert you to the problem.


Model Description Price & Quantity
FS 125NPT 1-1/4" NPT - Motorized Ball Valve (Brass)
Works with any 1-1/4" MIPT supply line - rated 0-110 psi
$194.00

- OR - View Cart

Optional Accessories

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
$16.45
FSTEW Transformer Extension Wires for Water Heater FloodStops (86" length) $14.16
FSC2VEW Controller to motorized ball valve extension wire
extends reach by 9 feet
$14.15

- OR - View Cart

to stainless steel flexible water connectors
for commercial water heaters and water conditioners

More Information About This FloodStop System

Water damage is not only due to leaks in the roof. Quite often, water damage can be traced to failed appliances such as water softeners and water heaters. Water conditioner overflows can also be the cause of significant property damage. The actual overflow event typically takes only a few minutes to begin and often goes unnoticed long after if has begun, especially if the equipment is installed in a closet or room closed to normal household activity.

Some leaks start small and go unnoticed until significant water damage is finally discovered. Such a leak can continue to collect and then seep between flooring and sub-flooring. The damage often goes unnoticed until the floor is visually buckled or warped, and by that time the damage and cost to replace can be extensive. No matter what initially caused the problem, from a small continuous leak to a broken component, a leaking seal or an accidental overflow, FloodStops can help you avoid unnecessary property damage by ensuring that an appliance failure is quickly identified.

Easily installed within 15 minutes the FloodStop system is designed to detect water, automatically shut off the water valve to the appliance and sound an alarm to alert you to the problem. The FloodStop FS 125NPT automatically shuts off the water supply as soon as water is detected on your strategically placed sensor.

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

120 Volt AC Input - 9 Volt DC Output transformer with 30" cord is included to easily plug into the nearest 120 Volt AC outlet. The controller includes one output contact to allow for an easy connection to your existing home alarm, home automation or auto-dialer systems if desired.

1-Year Manufacturer's Warranty.

FloodStop #FS 125NPT Components and Dimensions

  • One Motorized Ball Valve - 4-1/4"(L) x 4-1/2"(H) x 2-1/4"(W)
  • One Control Unit with Battery Backup and 30" cord to the valve - 4-3/4"(L) x 4-3/4" (H) x 1" (W)
  • One Water/Leak Sensor with 7' 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) and batteries should be installed for battery back-up when used with the 120 volt transformer
  • One 6" Output Contact Wire

How this FloodStop #FS 125NPT works:

  1. The FloodStop valve is installed between the water heater or water conditioner and its manual shutoff valve
  2. Water/leak sensor is placed at the base of the appliance or fixture (commercial water heater, water softener, whole house filter, etc.)
  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 (included in your FloodStop package) regular maintenance and inspections 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 X AA size batteries, which will serve as a battery backup in case of a power outage. The same batteries will 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. Unlike the washing machine and the icemaker, the water heater is not always located next to an electrical outlet, and so you may need to use the approximate 7-foot-long (86" length) 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 click here.


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